{"pageNumber":"370","pageRowStart":"9225","pageSize":"25","recordCount":10450,"records":[{"id":70014116,"text":"70014116 - 1987 - Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain","interactions":[],"lastModifiedDate":"2013-03-01T15:30:27","indexId":"70014116","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2682,"text":"Marine and Petroleum Geology","active":true,"publicationSubtype":{"id":10}},"title":"Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain","docAbstract":"Six submarine slope canyons in an area of the northwestern Mediterranean, offshore from the Ebro River and Delta, were surveyed with bathymetric swathmapping (SeaBeam) and mid-range side-looking sonar (SeaMARC I). All of the canyons have slightly winding paths with concave-upwards gradients that are relatively steep shallower than 1,200 m. Two major types of canyons are identified on the basis of their morphologic character at the base of the slope; Type-I canyons lead to an unchannelled base-of-slope deposit and Type-II canyons are continuous with channel-levee systems that cross the rise. Four Type-I canyons were surveyed in the area. Two of these are broad, U-shaped, steep (average gradients of 1:14), do not indent the shelf, and terminate downslope at debris-flow deposits. These two canyons, the most northern in the area, have rounded heads with extensive gullies separated by knife-edge ridges. Relief of the canyon walls is about equal on both sides of the canyons, although the right-hand walls (looking downslope) are generally steeper. The other two Type-I canyons in the area are similar in that they do not indent the shelf, but they are much smaller and shallower and coalesce before terminating in the base-of-slope region. The two Type-II canyons that feed leveed-channels are U-shaped with flatter floors, longer profiles and gentler gradients than Type-I canyons. They are closer to the Valencia Valley and have relatively small cross-sectional areas. We propose a four-stage evolutionary sequence to explain the development of the canyons observed in this section on the prograding Ebro margin. During the initial stage, slumping and erosion on the slope creates a network of small gullies. During the next stage, headward growth of one (or more) gully leads to a major indentation of the shelf. This is the critical factor for developing a channel that will incise the slope and provide a major conduit for moving sediment to the basin. Stage 3 is characterized by the development of a continuous channel accompanied by levee growth across the lobe. In the final stage, the channel-levee system becomes inactive either through destruction by mass wasting, infilling of the channel, or loss of the major sediment source. ?? 1987.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine and Petroleum Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0264-8172(87)90009-2","issn":"02648172","usgsCitation":"O'Connell, S., Ryan, W., and Normark, W.R., 1987, Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain: Marine and Petroleum Geology, v. 4, no. 4, Pages 308, IN1–IN2, 309–319, https://doi.org/10.1016/0264-8172(87)90009-2.","productDescription":"Pages 308, IN1–IN2, 309–319","costCenters":[],"links":[{"id":268654,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0264-8172(87)90009-2"},{"id":225295,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5ca6e4b0c8380cd6fe5b","contributors":{"authors":[{"text":"O'Connell, S.","contributorId":37060,"corporation":false,"usgs":true,"family":"O'Connell","given":"S.","affiliations":[],"preferred":false,"id":367628,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ryan, William B. F.","contributorId":86486,"corporation":false,"usgs":false,"family":"Ryan","given":"William B. F.","affiliations":[{"id":7135,"text":"Lamont Doherty Earth Observatory, Columbia University, Palisades, NY","active":true,"usgs":false}],"preferred":false,"id":367629,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Normark, W. R.","contributorId":87137,"corporation":false,"usgs":true,"family":"Normark","given":"W.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":367630,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014151,"text":"70014151 - 1987 - EFFECT OF AN ACID RAIN ENVIRONMENT ON LIMESTONE SURFACES.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:36","indexId":"70014151","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2696,"text":"Materials Performance","active":true,"publicationSubtype":{"id":10}},"title":"EFFECT OF AN ACID RAIN ENVIRONMENT ON LIMESTONE SURFACES.","docAbstract":"Salem limestone samples were exposed to weathering for 1 y in several urban and one rural environments. Samples exposed in the rural location were chemically indistinguishable from the freshly quarried limestone, whereas all samples collected from urban exposure sites developed gypsum stains on the ground-facing surfaces where the stones were not washed by precipitation. The gas-solid reaction of SO//2 with calcite was selected for detailed consideration. It appears from the model that under arid conditions, the quantity of stain deposited on an unwashed surface is independent of atmospheric SO//2 concentration once the surface has been saturated with gypsum. Under wet conditions, surface sulfation and weight loss are probably dominated by mechanisms involving wet stone. However, if the rain events are frequent and delimited by periods of dryness, the quantity of gypsum produced by a gas-solid reaction mechanism should correlate with both the frequency of rain events and the atmospheric SO//2 level.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Materials Performance","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00941492","usgsCitation":"Mossotti, V.G., Lindsay, J.R., and Hochella, M.F., 1987, EFFECT OF AN ACID RAIN ENVIRONMENT ON LIMESTONE SURFACES.: Materials Performance, v. 26, no. 11, p. 47-52.","startPage":"47","endPage":"52","numberOfPages":"6","costCenters":[],"links":[{"id":225941,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0456e4b0c8380cd508fb","contributors":{"authors":[{"text":"Mossotti, Victor G. mossotti@usgs.gov","contributorId":3494,"corporation":false,"usgs":true,"family":"Mossotti","given":"Victor","email":"mossotti@usgs.gov","middleInitial":"G.","affiliations":[],"preferred":true,"id":367723,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lindsay, James R.","contributorId":19714,"corporation":false,"usgs":true,"family":"Lindsay","given":"James","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":367725,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hochella, Michael F. Jr.","contributorId":16172,"corporation":false,"usgs":true,"family":"Hochella","given":"Michael","suffix":"Jr.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":367724,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014127,"text":"70014127 - 1987 - Stochastic simulation of spatially correlated geo-processes","interactions":[],"lastModifiedDate":"2012-03-12T17:19:29","indexId":"70014127","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2700,"text":"Mathematical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Stochastic simulation of spatially correlated geo-processes","docAbstract":"In this study, developments in the theory of stochastic simulation are discussed. The unifying element is the notion of Radon projection in Euclidean spaces. This notion provides a natural way of reconstructing the real process from a corresponding process observable on a reduced dimensionality space, where analysis is theoretically easier and computationally tractable. Within this framework, the concept of space transformation is defined and several of its properties, which are of significant importance within the context of spatially correlated processes, are explored. The turning bands operator is shown to follow from this. This strengthens considerably the theoretical background of the geostatistical method of simulation, and some new results are obtained in both the space and frequency domains. The inverse problem is solved generally and the applicability of the method is extended to anisotropic as well as integrated processes. Some ill-posed problems of the inverse operator are discussed. Effects of the measurement error and impulses at origin are examined. Important features of the simulated process as described by geomechanical laws, the morphology of the deposit, etc., may be incorporated in the analysis. The simulation may become a model-dependent procedure and this, in turn, may provide numerical solutions to spatial-temporal geologic models. Because the spatial simu??lation may be technically reduced to unidimensional simulations, various techniques of generating one-dimensional realizations are reviewed. To link theory and practice, an example is computed in detail. ?? 1987 International Association for Mathematical Geology.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mathematical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers-Plenum Publishers","doi":"10.1007/BF00893018","issn":"08828121","usgsCitation":"Christakos, G., 1987, Stochastic simulation of spatially correlated geo-processes: Mathematical Geology, v. 19, no. 8, p. 807-831, https://doi.org/10.1007/BF00893018.","startPage":"807","endPage":"831","numberOfPages":"25","costCenters":[],"links":[{"id":205637,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00893018"},{"id":225554,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9850e4b08c986b31bf84","contributors":{"authors":[{"text":"Christakos, G.","contributorId":87685,"corporation":false,"usgs":true,"family":"Christakos","given":"G.","email":"","affiliations":[],"preferred":false,"id":367655,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014643,"text":"70014643 - 1987 - Behavior of sensitivities in the one-dimensional advection-dispersion equation: Implications for parameter estimation and sampling design","interactions":[],"lastModifiedDate":"2018-02-21T11:09:03","indexId":"70014643","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Behavior of sensitivities in the one-dimensional advection-dispersion equation: Implications for parameter estimation and sampling design","docAbstract":"<p><span>The spatial and temporal variability of sensitivities has a significant impact on parameter estimation and sampling design for studies of solute transport in porous media. Physical insight into the behavior of sensitivities is offered through an analysis of analytically derived sensitivities for the one-dimensional form of the advection-dispersion equation. When parameters are estimated in regression models of one-dimensional transport, the spatial and temporal variability in sensitivities influences variance and covariance of parameter estimates. Several principles account for the observed influence of sensitivities on parameter uncertainty. (1) Information about a physical parameter may be most accurately gained at points in space and time with a high sensitivity to the parameter. (2) As the distance of observation points from the upstream boundary increases, maximum sensitivity to velocity during passage of the solute front increases and the consequent estimate of velocity tends to have lower variance. (3) The frequency of sampling must be “in phase” with the S shape of the dispersion sensitivity curve to yield the most information on dispersion. (4) The sensitivity to the dispersion coefficient is usually at least an order of magnitude less than the sensitivity to velocity. (5) The assumed probability distribution of random error in observations of solute concentration determines the form of the sensitivities. (6) If variance in random error in observations is large, trends in sensitivities of observation points may be obscured by noise and thus have limited value in predicting variance in parameter estimates among designs. (7) Designs that minimize the variance of one parameter may not necessarily minimize the variance of other parameters. (8) The time and space interval over which an observation point is sensitive to a given parameter depends on the actual values of the parameters in the underlying physical system.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR023i002p00253","usgsCitation":"Knopman, D.S., and Voss, C.I., 1987, Behavior of sensitivities in the one-dimensional advection-dispersion equation: Implications for parameter estimation and sampling design: Water Resources Research, v. 23, no. 2, p. 253-272, https://doi.org/10.1029/WR023i002p00253.","productDescription":"20 p.","startPage":"253","endPage":"272","costCenters":[],"links":[{"id":225522,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"5059ef7de4b0c8380cd4a285","contributors":{"authors":[{"text":"Knopman, Debra S.","contributorId":51472,"corporation":false,"usgs":true,"family":"Knopman","given":"Debra","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":368896,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Voss, Clifford I. 0000-0001-5923-2752 cvoss@usgs.gov","orcid":"https://orcid.org/0000-0001-5923-2752","contributorId":1559,"corporation":false,"usgs":true,"family":"Voss","given":"Clifford","email":"cvoss@usgs.gov","middleInitial":"I.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":368895,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014470,"text":"70014470 - 1987 - Benthic foraminifers on the continental shelf and upper slope, Russian River area, northern California ( USA).","interactions":[],"lastModifiedDate":"2013-03-24T12:09:49","indexId":"70014470","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2294,"text":"Journal of Foraminiferal Research","active":true,"publicationSubtype":{"id":10}},"title":"Benthic foraminifers on the continental shelf and upper slope, Russian River area, northern California ( USA).","docAbstract":"We analyzed benthic foraminifers from 71 surface samples collected from the sea floor of the continental margin. One hundred and six different taxa were identified, and Q-mode factor analysis was used to identify assemblages. Six foraminiferal assemblage factors explain 94% of the variation in the data matrix. The Inner Shelf Assemblage is characterized by Trichohyalus ornatissima, Rotalia columbiensis, Cassidulina limbata, Cibicides fletcheri, Elphidiella hannai and Elphidium sp. 1 and occupies water depths less than 50 m. The Middle Shelf Assemblage is characterized by Nonionella basispinata, Elphidium excavatum and Florilus labradoricus and occupies water depths between 50 and 90 m. A Middle Shelf to Upper Bathyal Assemblage is characterized by Uvigerina juncea, Globobulimina spp. and Nonionella basispinata and occupies depths between about 90 and 450 m. Two overlapping assemblages make up the Upper Middle Bathyal Assemblage and are most abundant between water depths of 500 and 1300 m. They are associated with low- oxygen conditions. The Mid-Bathyal Assemblage is dominated by Uvigerina proboscidea and occurs on the slope at water depths ranging from 1200 to 2500 m. -from Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Foraminiferal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsjfr.17.2.132","issn":"00961191","usgsCitation":"Quinterno, P., and Gardner, J., 1987, Benthic foraminifers on the continental shelf and upper slope, Russian River area, northern California ( USA).: Journal of Foraminiferal Research, v. 17, no. 2, p. 132-152, https://doi.org/10.2113/gsjfr.17.2.132.","startPage":"132","endPage":"152","numberOfPages":"21","costCenters":[],"links":[{"id":226087,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269895,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsjfr.17.2.132"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f0b9e4b0c8380cd4a8a1","contributors":{"authors":[{"text":"Quinterno, P. J.","contributorId":65465,"corporation":false,"usgs":true,"family":"Quinterno","given":"P. J.","affiliations":[],"preferred":false,"id":368471,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gardner, J.V.","contributorId":76705,"corporation":false,"usgs":true,"family":"Gardner","given":"J.V.","affiliations":[],"preferred":false,"id":368472,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014128,"text":"70014128 - 1987 - Valles Marineris, Mars: Wet debris flows and ground ice","interactions":[],"lastModifiedDate":"2018-10-23T11:45:24","indexId":"70014128","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Valles Marineris, Mars: Wet debris flows and ground ice","docAbstract":"<p>Detailed study of the Valles Marineris equatorial troughs suggests that the landslides in that area contained water and probably were gigantic wet debris flows: one landslide complex generated a channel that has several bends and extends for 250 km. Further support for water or ice in debris masses includes rounded flow lobes and transport of some slide masses in the direction of the local topographic slope. Differences in speed and emplacement efficiency between Martian and terrestrial landslides can be attributed to the entrainment of volatiles on Mars, but they can also be explained by other mechanisms. Support that the wall rock contained water comes from the following observations: (1) the water within the landslide debris must have been derived from wall rock; (2) debris appears to have been transported through tributary canyons; (3) locally, channels emerged from the canyons; (4) the wall rock apprarently disintegrated and flowed easily; and (5) fault zones within the troughs are unusually resistant to erosion. The study further suggests that, in the equatorial region of Mars, material below depths of 400-800 m was not desiccated during the time of landslide activity (within the last billion years of Martian history). Therefore the Martian ground-water or groundice reservoir, if not a relic from ancient times, must have been replenished.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(87)90183-7","issn":"00191035","usgsCitation":"Lucchitta, B.K., 1987, Valles Marineris, Mars: Wet debris flows and ground ice: Icarus, v. 72, no. 2, p. 411-429, https://doi.org/10.1016/0019-1035(87)90183-7.","productDescription":"19 p.","startPage":"411","endPage":"429","numberOfPages":"19","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":225555,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"72","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc106e4b08c986b32a415","contributors":{"authors":[{"text":"Lucchitta, Baerbel K. blucchitta@usgs.gov","contributorId":3649,"corporation":false,"usgs":true,"family":"Lucchitta","given":"Baerbel","email":"blucchitta@usgs.gov","middleInitial":"K.","affiliations":[],"preferred":true,"id":367656,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70015296,"text":"70015296 - 1987 - Stratification of a cityscape using census and land use variables for inventory of building materials","interactions":[],"lastModifiedDate":"2012-03-12T17:18:53","indexId":"70015296","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3543,"text":"The Annals of Regional Science","active":true,"publicationSubtype":{"id":10}},"title":"Stratification of a cityscape using census and land use variables for inventory of building materials","docAbstract":"A cityscape (or any landscape) can be stratified into environmental units using multiple variables of information. For the purposes of sampling building materials, census and land use variables were used to identify similar strata. In the Metropolitan Statistical Area of a cityscape, the census tract is the smallest unit for which census data are summarized and digitized boundaries are available. For purposes of this analysis, census data on total population, total number of housing units, and number of singleunit dwellings were aggregated into variables of persons per square kilometer and proportion of housing units in single-unit dwellings. The level 2 categories of the U.S. Geological Survey's land use and land cover data base were aggregated into variables of proportion of residential land with buildings, proportion of nonresidential land with buildings, and proportion of open land. The cityscape was stratified, from these variables, into environmental strata of Urban Central Business District, Urban Livelihood Industrial Commercial, Urban Multi-Family Residential, Urban Single Family Residential, Non-Urban Suburbanizing, and Non-Urban Rural. The New England region was chosen as a region with commonality of building materials, and a procedure developed for trial classification of census tracts into one of the strata. Final stratification was performed by discriminant analysis using the trial classification and prior probabilities as weights. The procedure was applied to several cities, and the results analyzed by correlation analysis from a field sample of building materials. The methodology developed for stratification of a cityscape using multiple variables has application to many other types of environmental studies, including forest inventory, hydrologic unit management, waste disposal, transportation studies, and other urban studies. Multivariate analysis techniques have recently been used for urban stratification in England. ?? 1987 Annals of Regional Science.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"The Annals of Regional Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01540229","issn":"05701864","usgsCitation":"Rosenfield, G., Fitzpatrick-Lins, K., and Johnson, T.L., 1987, Stratification of a cityscape using census and land use variables for inventory of building materials: The Annals of Regional Science, v. 21, no. 1, p. 22-33, https://doi.org/10.1007/BF01540229.","startPage":"22","endPage":"33","numberOfPages":"12","costCenters":[],"links":[{"id":224246,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205459,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01540229"}],"volume":"21","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b98c0e4b08c986b31c11e","contributors":{"authors":[{"text":"Rosenfield, G.H.","contributorId":94670,"corporation":false,"usgs":true,"family":"Rosenfield","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":370574,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fitzpatrick-Lins, K.","contributorId":78480,"corporation":false,"usgs":true,"family":"Fitzpatrick-Lins","given":"K.","affiliations":[],"preferred":false,"id":370572,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, T. L.","contributorId":91062,"corporation":false,"usgs":true,"family":"Johnson","given":"T.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":370573,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70015281,"text":"70015281 - 1987 - Depth-averaging effects on hydraulic head for media with stochastic hydraulic conductivity","interactions":[],"lastModifiedDate":"2018-02-21T11:07:39","indexId":"70015281","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Depth-averaging effects on hydraulic head for media with stochastic hydraulic conductivity","docAbstract":"<p><span>Hydraulic conductivity of a porous medium frequently is considered to be a single realization of a three-dimensional spatial stochastic process. The most common observations of flow in porous media are hydraulic-head measurements obtained from wells which are screened over extensive sections of the medium. These measurements represent, approximately, a one-dimensional spatial average of the actual three-dimensional head distribution, the actual head distribution being a stochastic process resulting from flow through a random hydraulic-conductivity field. This paper examines, via ensemble averages, the effect of such spatial averages of groundwater flow on the spatial autocovariance function for a simple, yet viable, stochastic model of a bounded medium. The model is taken to be three-dimensional flow in a medium that is bounded above and below and in which the hydraulic conductivity is a second-order stationary stochastic process. Spatial averaging of the hydraulic heads is considered to take place over the entire thickness of the medium. Ensemble variances and autocorrelations for depth-averaged heads are computed for the resulting two-dimensional flow system and compared with those from a fully three-dimensional flow system.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR023i004p00561","usgsCitation":"Naff, R., and Vecchia, A.V., 1987, Depth-averaging effects on hydraulic head for media with stochastic hydraulic conductivity: Water Resources Research, v. 23, no. 4, p. 561-570, https://doi.org/10.1029/WR023i004p00561.","productDescription":"10 p.","startPage":"561","endPage":"570","costCenters":[],"links":[{"id":224027,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"5059fd41e4b0c8380cd4e708","contributors":{"authors":[{"text":"Naff, R.L.","contributorId":86349,"corporation":false,"usgs":true,"family":"Naff","given":"R.L.","affiliations":[],"preferred":false,"id":370534,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vecchia, A. V.","contributorId":23533,"corporation":false,"usgs":true,"family":"Vecchia","given":"A.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":370533,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70015268,"text":"70015268 - 1987 - Unsaturated flow in a centrifugal field: Measurement of hydraulic conductivity and testing of Darcy's Law","interactions":[],"lastModifiedDate":"2020-01-18T10:33:21","indexId":"70015268","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Unsaturated flow in a centrifugal field: Measurement of hydraulic conductivity and testing of Darcy's Law","docAbstract":"<p>A method has been developed to establish steady state flow of water in an unsaturated soil sample spinning in a centrifuge. Theoretical analysis predicts moisture conditions in the sample that depend strongly on soil type and certain operating parameters. For Oakley sand, measurements of flux, water content, and matric potential during and after centrifugation verify that steady state flow can be achieved. Experiments have confirmed the theoretical prediction of a nearly uniform moisture distribution for this medium and have demonstrated that the flow can be effectively one-dimensional. The method was used for steady state measurements of hydraulic conductivity <i>K</i> for relatively dry soil, giving values as low as 7.6 × 10<sup>−11</sup> m/s with data obtained in a few hours. Darcy's law was tested by measuring <i>K</i> for different centrifugal driving forces but with the same water content. For the sand at a bulk density of 1.82 Mg/m<sup>3</sup> and 27% saturation, results were consistent with Darcy's law for <i>K</i> equal to 5.22 × 10<sup>−10</sup> m/s and forces ranging from 216 to 1650 times normal gravity.</p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR023i001p00124","usgsCitation":"Nimmo, J.R., Rubin, J., and Hammermeister, D., 1987, Unsaturated flow in a centrifugal field: Measurement of hydraulic conductivity and testing of Darcy's Law: Water Resources Research, v. 23, no. 1, p. 124-134, https://doi.org/10.1029/WR023i001p00124.","productDescription":"11 p.","startPage":"124","endPage":"134","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":223865,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505bbb3fe4b08c986b3285ba","contributors":{"authors":[{"text":"Nimmo, John R. 0000-0001-8191-1727 jrnimmo@usgs.gov","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":757,"corporation":false,"usgs":true,"family":"Nimmo","given":"John","email":"jrnimmo@usgs.gov","middleInitial":"R.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":779738,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rubin, J.","contributorId":26433,"corporation":false,"usgs":true,"family":"Rubin","given":"J.","email":"","affiliations":[],"preferred":false,"id":370500,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hammermeister, D.P.","contributorId":27066,"corporation":false,"usgs":true,"family":"Hammermeister","given":"D.P.","affiliations":[],"preferred":false,"id":370501,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70015261,"text":"70015261 - 1987 - Status of glacial Lake Columbia during the last floods from glacial Lake Missoula","interactions":[],"lastModifiedDate":"2013-01-26T07:20:34","indexId":"70015261","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Status of glacial Lake Columbia during the last floods from glacial Lake Missoula","docAbstract":"The last floods from glacial Lake Missoula, Montana, probably ran into glacial Lake Columbia, in northeastern Washington. In or near Lake Columbia's Sanpoil arm, Lake Missoula floods dating from late in the Fraser glaciation produced normally graded silt beds that become thinner upsection and which alternate with intervals of progressively fewer varves. The highest three interflood intervals each contain only one or two varves, and about 200-400 successive varves conformably overlie the highest flood bed. This sequence suggests that jo??kulhlaup frequency progressively increased until Lake Missoula ended, and that Lake Columbia outlasted Lake Missoula. The upper Grand Coulee, Lake Columbia's late Fraser-age outlet, contains a section of 13 graded beds, most of them sandy and separated by varves, that may correlate with the highest Missoula-flood beds of the Sanpoil River valley. The upper Grand Coulee also contains probable correlatives of many of the approximately 200-400 succeeding varves, as do nearby parts of the Columbia River valley. This collective evidence casts doubt on a prevailing hypothesis according to which one or more late Fraser-age floods from Lake Missoula descended the Columbia River valley with little or no interference from Lake Columbia's Okanogan-lobe dam. ?? 1987.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/0033-5894(87)90076-7","issn":"00335894","usgsCitation":"Atwater, B., 1987, Status of glacial Lake Columbia during the last floods from glacial Lake Missoula: Quaternary Research, v. 27, no. 2, p. 182-201, https://doi.org/10.1016/0033-5894(87)90076-7.","startPage":"182","endPage":"201","numberOfPages":"20","costCenters":[],"links":[{"id":223757,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266535,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0033-5894(87)90076-7"}],"volume":"27","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505b97bce4b08c986b31bc2d","contributors":{"authors":[{"text":"Atwater, B.F. 0000-0003-1155-2815","orcid":"https://orcid.org/0000-0003-1155-2815","contributorId":14006,"corporation":false,"usgs":true,"family":"Atwater","given":"B.F.","affiliations":[],"preferred":false,"id":370487,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70015236,"text":"70015236 - 1987 - Studies of Quaternary saline lakes-III. Mineral, chemical, and isotopic evidence of salt solution and crystallization processes in Owens Lake, California, 1969-1971","interactions":[],"lastModifiedDate":"2024-04-03T15:34:39.520601","indexId":"70015236","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Studies of Quaternary saline lakes-III. Mineral, chemical, and isotopic evidence of salt solution and crystallization processes in Owens Lake, California, 1969-1971","docAbstract":"<div id=\"preview-section-abstract\"><div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"aep-abstract-id4\" class=\"abstract author\"><div id=\"aep-abstract-sec-id5\"><p>As a consequence of the 1969–1970 flooding of normally dry Owens Lake, a 2.4-m-deep lake formed and 20% of the 2-m-thick salt bed dissolved in it. Its desiccation began August 1969, and salts started crystallizing September 1970, ending August 1971. Mineralogic, brine-composition, and stable-isotope data plus field observations showed that while the evolving brine composition established the general crystallization timetable and range of primary and secondary mineral assemblages, it was the daily, monthly, and seasonal temperature changes that controlled the details of timing and mineralogy during this depositional process. Deuterium analyses of lake brine, interstitial brine, and hydrated saline phases helped confirm the sequence of mineral crystallizations and transformations, and they documented the sources and temperatures of waters involved in the reactions.</p><p>Salts first crystallized as floating rafts on the lake surface. Natron and mirabilite, salts whose solubilities decrease greatly with lowering temperatures, crystallized late at night in winter, when surface-water temperatures reached their minima; trona, nahcolite, burkeite, and halite, salts with solubilities less sensitive to temperature, crystallized during the afternoon in summer, when surface salinities reached their maxima. However, different temperatures were generally associated with crystallization (at the surface) and accumulation (on the lake floor) because short-term temperature changes were transmitted to surface and bottom waters at different rates. Consequently, even when solubilities were exceeded at the surface, salts were preserved or not as a function of bottom-water temperatures. Halite, a nearly temperature-insensitive salt, was always preserved.</p><p>Monitoring the lake-brine chemistry and mineralogy of the accumulating salts shows: (1) An estimated 0.9 × 10<sup>6</sup><span>&nbsp;</span>tons of CO<sub>2</sub><span>&nbsp;</span>was released to the atmosphere or consumed by the lake's biomass prior to most salt crystallization. (2) After deposition, some salts reacted<span>&nbsp;</span><i>in situ</i><span>&nbsp;</span>to form other minerals in less than one month, and all salts (except halite) decomposed or recrystallized at least once in response to seasons. (3) Warming in early 1971 caused solution of all the mirabilite and some of the natron deposited a few months earlier, a deepening of the lake (though the lake-surface lowered), and an increase in dissolved solids. (4) Phase and solubility-index data suggest that at the close of desiccation, Na<sub>2</sub>CO<sub>3</sub>·7H<sub>2</sub>O, never reported as a mineral, could have been the next phase to crystallize.</p></div></div></div></div><div id=\"preview-section-introduction\"><br></div><div id=\"preview-section-snippets\"><br></div><div id=\"preview-section-references\"><br></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(87)90095-0","issn":"00167037","usgsCitation":"Smith, G., Friedman, I., and McLaughlin, R.J., 1987, Studies of Quaternary saline lakes-III. Mineral, chemical, and isotopic evidence of salt solution and crystallization processes in Owens Lake, California, 1969-1971: Geochimica et Cosmochimica Acta, v. 51, no. 4, p. 811-827, https://doi.org/10.1016/0016-7037(87)90095-0.","productDescription":"17 p.","startPage":"811","endPage":"827","numberOfPages":"17","costCenters":[],"links":[{"id":224244,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"51","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9c8ce4b08c986b31d430","contributors":{"authors":[{"text":"Smith, G.I.","contributorId":103694,"corporation":false,"usgs":true,"family":"Smith","given":"G.I.","email":"","affiliations":[],"preferred":false,"id":370405,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Friedman, I.","contributorId":95596,"corporation":false,"usgs":true,"family":"Friedman","given":"I.","email":"","affiliations":[],"preferred":false,"id":370404,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McLaughlin, R. J. 0000-0002-4390-2288","orcid":"https://orcid.org/0000-0002-4390-2288","contributorId":107271,"corporation":false,"usgs":true,"family":"McLaughlin","given":"R.","middleInitial":"J.","affiliations":[],"preferred":false,"id":370406,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70015238,"text":"70015238 - 1987 - Influence of late Quaternary climatic changes on geomorphic and pedogenic processes on a desert piedmont, Eastern Mojave Desert, California","interactions":[],"lastModifiedDate":"2013-01-26T07:19:40","indexId":"70015238","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Influence of late Quaternary climatic changes on geomorphic and pedogenic processes on a desert piedmont, Eastern Mojave Desert, California","docAbstract":"Radiocarbon dating of late Quaternary deposits and shorelines of Lake Mojave and cation-ratio numerical age dating of stone pavements (Dorn, 1984) on the adjacent Soda Mountains piedmont provide age constraints for alluvial and eolian deposits. These deposits are associated with climatically controlled stands of Lake Mojave during the past 15,000 yr. Six alluvial fan units and three eolian stratigraphic units were assigned ages based on field relations with dated shorelines and piedmont surfaces, as well as on soil-geomorphic data. All but one of these stratigraphic units were deposited in response to time-transgressive climatic changes beginning approximately 10,000 yr ago. Increased eolian flux rates occurred in response to the lowering of Lake Mojave and a consequent increase in fine-sediment availability. Increased rates of deposition of eolian fines and associated salts influenced pedogenesis, stone-pavement development, and runoff-infiltration relations by (1) enhancing mechanical weathering of fan surfaces and hillslopes and (2) forming clay- and silt-rich surface horizons which decrease infiltration. Changes in alluvial-fan source areas from hillslopes to piedmonts during the Holocene reflect runoff reduction on hillslopes caused by colluvial mantle development and runoff enhancement on piedmonts caused by the development of less-permeable soils. Inferred increased in early to middle Holocene monsoonal activity resulted in high-magnitude paleo-sheetflood events on older fan pavements; this runoff triggered piedmont dissection which, in turn, caused increased sediment availability along channel walls. Thus, runoff-infiltration changes during the late Quaternary have occurred in response to eolian deposition of fines, pedogenesis, increased sheetflood activity in the Holocene, and vegetational changes which are related to many complicated linkages among climatic change, lake fluctuations, and eolian, hillslope, and alluvial-fan processes. ?? 1987.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/0033-5894(87)90072-X","issn":"00335894","usgsCitation":"Wells, S.G., McFadden, L.D., and Dohrenwend, J.C., 1987, Influence of late Quaternary climatic changes on geomorphic and pedogenic processes on a desert piedmont, Eastern Mojave Desert, California: Quaternary Research, v. 27, no. 2, p. 130-146, https://doi.org/10.1016/0033-5894(87)90072-X.","startPage":"130","endPage":"146","numberOfPages":"17","costCenters":[],"links":[{"id":266534,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0033-5894(87)90072-X"},{"id":224295,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a3b4be4b0c8380cd623de","contributors":{"authors":[{"text":"Wells, S. G.","contributorId":81257,"corporation":false,"usgs":false,"family":"Wells","given":"S.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":370411,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McFadden, L. D.","contributorId":15765,"corporation":false,"usgs":false,"family":"McFadden","given":"L.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":370409,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dohrenwend, J. C.","contributorId":40960,"corporation":false,"usgs":true,"family":"Dohrenwend","given":"J.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":370410,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014167,"text":"70014167 - 1987 - Moment tensor solutions estimated using optimal filter theory for 51 selected earthquakes, 1980-1984","interactions":[],"lastModifiedDate":"2013-02-13T13:20:21","indexId":"70014167","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3071,"text":"Physics of the Earth and Planetary Interiors","active":true,"publicationSubtype":{"id":10}},"title":"Moment tensor solutions estimated using optimal filter theory for 51 selected earthquakes, 1980-1984","docAbstract":"The 51 global events that occurred from January 1980 to March 1984, which were chosen by the convenors of the Symposium on Seismological Theory and Practice, have been analyzed using a moment tensor inversion algorithm (Sipkin). Many of the events were routinely analyzed as part of the National Earthquake Information Center's (NEIC) efforts to publish moment tensor and first-motion fault-plane solutions for all moderate- to large-sized (mb>5.7) earthquakes. In routine use only long-period P-waves are used and the source-time function is constrained to be a step-function at the source (??-function in the far-field). Four of the events were of special interest, and long-period P, SH-wave solutions were obtained. For three of these events, an unconstrained inversion was performed. The resulting time-dependent solutions indicated that, for many cases, departures of the solutions from pure double-couples are caused by source complexity that has not been adequately modeled. These solutions also indicate that source complexity of moderate-sized events can be determined from long-period data. Finally, for one of the events of special interest, an inversion of the broadband P-waveforms was also performed, demonstrating the potential for using broadband waveform data in inversion procedures. ?? 1987.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Physics of the Earth and Planetary Interiors","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/0031-9201(87)90068-9","issn":"00319201","usgsCitation":"Sipkin, S., 1987, Moment tensor solutions estimated using optimal filter theory for 51 selected earthquakes, 1980-1984: Physics of the Earth and Planetary Interiors, v. 47, no. C, p. 67-79, https://doi.org/10.1016/0031-9201(87)90068-9.","startPage":"67","endPage":"79","numberOfPages":"13","costCenters":[],"links":[{"id":267329,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0031-9201(87)90068-9"},{"id":225237,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"C","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5d3ae4b0c8380cd70242","contributors":{"authors":[{"text":"Sipkin, S.A.","contributorId":9399,"corporation":false,"usgs":true,"family":"Sipkin","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":367763,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014168,"text":"70014168 - 1987 - Transport of reacting solutes subject to a moving dissolution boundary: Numerical methods and solutions","interactions":[],"lastModifiedDate":"2020-01-18T09:41:14","indexId":"70014168","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Transport of reacting solutes subject to a moving dissolution boundary: Numerical methods and solutions","docAbstract":"<p><span>A moving boundary problem which arises during transport with precipitation-dissolution reactions is solved by three different numerical methods. Two of these methods (one explicit and one implicit) are based on an integral formulation of mass balance and lead to an approximation of a weak solution. These methods are compared to a front-tracking scheme. Although the two approaches are conceptually different, the numerical solutions showed good agreement. As the ratio of dispersion to convection decreases, the methods based on the integral formulation become computationally more efficient. Specific reactions were modeled to examine the dependence of the system on the physical and chemical parameters. Although the water flow rate does not explicitly appear in the equation for the velocity of the moving boundary, the speed of the boundary depends more on the flux rate than on the dispersion coefficient. The discontinuity in the gradient of the solute concentration profile at the boundary increases with convection and with the initial concentration of the mineral. Our implicit method is extended to allow participation of the solutes in complexation reactions as well as the precipitation-dissolution reaction. This extension is easily made and does not change the basic method.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR023i008p01561","usgsCitation":"Willis, C., and Rubin, J., 1987, Transport of reacting solutes subject to a moving dissolution boundary: Numerical methods and solutions: Water Resources Research, v. 23, no. 8, p. 1561-1574, https://doi.org/10.1029/WR023i008p01561.","productDescription":"14 p.","startPage":"1561","endPage":"1574","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":225297,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"8","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505ba391e4b08c986b31fd6f","contributors":{"authors":[{"text":"Willis, Catherine","contributorId":42489,"corporation":false,"usgs":true,"family":"Willis","given":"Catherine","email":"","affiliations":[],"preferred":false,"id":367765,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rubin, Jacob","contributorId":23918,"corporation":false,"usgs":true,"family":"Rubin","given":"Jacob","email":"","affiliations":[],"preferred":false,"id":367764,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014169,"text":"70014169 - 1987 - CALCULATION OF NONLINEAR CONFIDENCE AND PREDICTION INTERVALS FOR GROUND-WATER FLOW MODELS.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:31","indexId":"70014169","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3718,"text":"Water Resources Bulletin","printIssn":"0043-1370","active":true,"publicationSubtype":{"id":10}},"title":"CALCULATION OF NONLINEAR CONFIDENCE AND PREDICTION INTERVALS FOR GROUND-WATER FLOW MODELS.","docAbstract":"A method is derived to efficiently compute nonlinear confidence and prediction intervals on any function of parameters derived as output from a mathematical model of a physical system. The method is applied to the problem of obtaining confidence and prediction intervals for manually-calibrated ground-water flow models. To obtain confidence and prediction intervals resulting from uncertainties in parameters, the calibrated model and information on extreme ranges and ordering of the model parameters within one or more independent groups are required. If random errors in the dependent variable are present in addition to uncertainties in parameters, then calculation of prediction intervals also requires information on the extreme range of error expected. A simple Monte Carlo method is used to compute the quantiles necessary to establish probability levels for the confidence and prediction intervals. Application of the method to a hypothetical example showed that inclusion of random errors in the dependent variable in addition to uncertainties in parameters can considerably widen the prediction intervals.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water Resources Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00431370","usgsCitation":"Cooley, R.L., and Vecchia, A.V., 1987, CALCULATION OF NONLINEAR CONFIDENCE AND PREDICTION INTERVALS FOR GROUND-WATER FLOW MODELS.: Water Resources Bulletin, v. 23, no. 4, p. 581-599.","startPage":"581","endPage":"599","numberOfPages":"19","costCenters":[],"links":[{"id":225298,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f2c4e4b0c8380cd4b355","contributors":{"authors":[{"text":"Cooley, Richard L.","contributorId":8831,"corporation":false,"usgs":true,"family":"Cooley","given":"Richard","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":367766,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vecchia, Aldo V. 0000-0002-2661-4401","orcid":"https://orcid.org/0000-0002-2661-4401","contributorId":41810,"corporation":false,"usgs":true,"family":"Vecchia","given":"Aldo","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":367767,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014193,"text":"70014193 - 1987 - Multiple sources of alkanes in Quaternary oceanic sediment of Antarctica","interactions":[],"lastModifiedDate":"2025-03-14T22:13:56.779893","indexId":"70014193","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2958,"text":"Organic Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Multiple sources of alkanes in Quaternary oceanic sediment of Antarctica","docAbstract":"<p><span>Normal alkanes (</span><i>n</i><span>-C</span><sub>13</sub><img src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" alt=\"single bond\" data-mce-src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\"><i>n</i><span>-C</span><sub>36</sub><span>), isoprenoid hydrocarbons (</span><i>i</i><span>-C</span><sub>15</sub><span>,&nbsp;</span><i>i</i><span>-C</span><sub>16</sub><span>,&nbsp;</span><i>i</i><span>-C</span><sub>18</sub><span>,&nbsp;</span><i>i</i><span>-C</span><sub>19</sub><span>, and&nbsp;</span><i>i</i><span>-C</span><sub>20</sub><span>) triterpanes (C</span><sub>27</sub><img src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" alt=\"single bond\" data-mce-src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\"><span>C</span><sub>32</sub><span>), and (C</span><sub>27</sub><img src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" alt=\"single bond\" data-mce-src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\"><span>C</span><sub>29</sub><span>) are present in low concentrations offshore Antarctica in near-surface, Quaternary sediment of the Wilkes Land continental margin and of the western Ross Sea. The distributions of these hydrocarbons are interpreted relative to possible sources and processes. The hydrocarbons appear to be mixtures of primary and recycled material from marine and terrigenous sources. The&nbsp;</span><i>n</i><span>-alkanes are most abundant and are characterized by two distinct populations, one of probable marine origin and the other likely from terrigenous, vascular plant sources. Because the continent of Antarctica today is devoid of higher plants, the plant-derived hydrocarbons in these offshore sediments probably came from wind-blown material and recycled Antarctic sediment that contains land-plant remains from an earlier period of time. Isoprenoid hydrocarbons are partially recycled and mainly of marine origin; the dominance of pristane over phytane suggests oxic paleoenvironmental conditions. Both modern and ancient triterpanes and steranes are present, and the distribution of these indicates a mixture of primary and recycled bacterial, algal, and possible higher-plant materials. Although the sampled sediments were deposited during the Quaternary, they apparently contain a significant component of hydrocarbons of pre-Quaternary age.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0146-6380(87)90040-4","usgsCitation":"Kvenvolden, K.A., Rapp, J., Golan-Bac, M., and Hostettler, F.D., 1987, Multiple sources of alkanes in Quaternary oceanic sediment of Antarctica: Organic Geochemistry, v. 11, no. 4, p. 291-302, https://doi.org/10.1016/0146-6380(87)90040-4.","productDescription":"12 p.","startPage":"291","endPage":"302","costCenters":[],"links":[{"id":225690,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Antarctica","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              160.97363351207912,\n              -73.17043004224713\n            ],\n            [\n              160.97363351207912,\n              -78.3166029074892\n            ],\n            [\n              181.77303555738786,\n              -78.3166029074892\n            ],\n            [\n              181.77303555738786,\n              -73.17043004224713\n            ],\n            [\n              160.97363351207912,\n              -73.17043004224713\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"11","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a607ce4b0c8380cd714be","contributors":{"authors":[{"text":"Kvenvolden, Keith A. kkvenvolden@usgs.gov","contributorId":3384,"corporation":false,"usgs":true,"family":"Kvenvolden","given":"Keith","email":"kkvenvolden@usgs.gov","middleInitial":"A.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":367823,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rapp, John B.","contributorId":32028,"corporation":false,"usgs":true,"family":"Rapp","given":"John B.","affiliations":[],"preferred":false,"id":367822,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Golan-Bac, Margaret","contributorId":19169,"corporation":false,"usgs":true,"family":"Golan-Bac","given":"Margaret","email":"","affiliations":[],"preferred":false,"id":367824,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hostettler, Frances D. fdhostet@usgs.gov","contributorId":3383,"corporation":false,"usgs":true,"family":"Hostettler","given":"Frances","email":"fdhostet@usgs.gov","middleInitial":"D.","affiliations":[],"preferred":true,"id":367825,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70014207,"text":"70014207 - 1987 - Sedimentation across the central California oxygen minimum zone: an alternative coastal upwelling sequence","interactions":[],"lastModifiedDate":"2024-05-20T23:21:01.592141","indexId":"70014207","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2450,"text":"Journal of Sedimentary Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Sedimentation across the central California oxygen minimum zone: an alternative coastal upwelling sequence","docAbstract":"<div><div id=\"12459549\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Distribution, abundance, and diversity of terrigenous, authigenous, and biogenous material provide evidence of the effect of bottom currents and oxygen minimum zone (OMZ) on continental slope sedimentation offshore central California. Box core samples and bottom photographs collected across the oxygen minimum zone of the coastal upwelling system were analyzed for lithologic and biologic trends. Three major OMZ facies are identified, along the upper and lower edges of the OMZ and one at its core. The upper boundary (525 m) of the central California OMZ (&lt; 0.5 ml/liter O<span>&nbsp;</span><sub>2</sub><span>&nbsp;</span>) is characterized by glauconitic gravelly sands relatively depleted in detrital silicates and enriched in carbonate and total organic carbon (TOC). These upper-boundary sands also have a maximum macrofauna density and a high abundance of foraminiferal fragments (&gt; 80% of total forams) with Cassidulina the dominant benthic foraminifer. With increasing water depth, decreasing current speed, and dissolved oxygen content toward the core of the OMZ (750 m), grain size, glauconite, carbonate, TOC, and foraminiferal fragments all decrease as the abundance of mica and detrital silicates increase. The greatest number of genera of benthic foraminifera occurs at the core of the OMZ where their relative concentration is at a minimum and Bolivina is the dominant genus. No heavily calcified macrofauna were found at the core of the OMZ; however, near-surface sediments are highly bioturbated. As the lower boundary (1,025 m) of the OMZ is approached, grain size and abundance of detrital silicates continue to decrease as glauconite disappears. Concomitantly, the relative abundance of mica, carbonate, TOC, siliceous microfauna, benthic foraminifers, and foram fragments increase. The benthic foraminifer population consists largely (&gt; 40%) of Globobulimina and Praeglobobulimina . The lower edge of the OMZ is highlighted by a distinct peak of fecal pellets (25% of sand-size material). Lithofacies and biofacies associated with the OMZ are controlled by an interplay of oceanic circulation, dissolved oxygen concentrations, and possibly by increased biological activity within the OMZ edge environment and slight changes in the slope gradient. Recognition of key lithofacies and biofacies trends may prove to be powerful paleoenvironmental/paleoceanographic indicators and may be useful in identifying ancient zones of upwelling analogous to the modern central California system where phosphorites, organic-rich shales, and/or chert are absent.</p></div></div>","language":"English","publisher":"SEPM","doi":"10.1306/212F8BE8-2B24-11D7-8648000102C1865D","issn":"00224472","usgsCitation":"Vercoutere, T., Mullins, H., McDougall, K., and Thompson, J., 1987, Sedimentation across the central California oxygen minimum zone: an alternative coastal upwelling sequence: Journal of Sedimentary Petrology, v. 57, no. 4, p. 709-722, https://doi.org/10.1306/212F8BE8-2B24-11D7-8648000102C1865D.","productDescription":"14 p.","startPage":"709","endPage":"722","numberOfPages":"14","costCenters":[],"links":[{"id":225820,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"57","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8a4de4b08c986b317124","contributors":{"authors":[{"text":"Vercoutere, T. L.","contributorId":102445,"corporation":false,"usgs":true,"family":"Vercoutere","given":"T. L.","affiliations":[],"preferred":false,"id":367859,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mullins, H.T.","contributorId":76881,"corporation":false,"usgs":true,"family":"Mullins","given":"H.T.","email":"","affiliations":[],"preferred":false,"id":367857,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McDougall, K.","contributorId":106260,"corporation":false,"usgs":true,"family":"McDougall","given":"K.","email":"","affiliations":[],"preferred":false,"id":367860,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Thompson, J.B.","contributorId":82311,"corporation":false,"usgs":true,"family":"Thompson","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":367858,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70014213,"text":"70014213 - 1987 - Chemical structural studies of natural lignin by dipolar dephasing solid-state 13C nuclear magnetic resonance","interactions":[],"lastModifiedDate":"2025-03-14T21:47:43.893589","indexId":"70014213","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2958,"text":"Organic Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Chemical structural studies of natural lignin by dipolar dephasing solid-state 13C nuclear magnetic resonance","docAbstract":"<p><span>Two natural lignins, one from a gymnosperm wood the other from angiosperm wood, were examined by conventional solid-state and dipolar dephasing&nbsp;</span><sup>13</sup><span>C nuclear magnetic resonance (NMR) techniques. The results obtained from both techniques show that the structure of natural lignins is consistent with models of softwood and hardwood lignin. The dipolar dephasing NMR data provide a measure of the degree of substitution on aromatic rings which is consistent with the models.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0146-6380(87)90049-0","usgsCitation":"Hatcher, P.G., 1987, Chemical structural studies of natural lignin by dipolar dephasing solid-state 13C nuclear magnetic resonance: Organic Geochemistry, v. 11, no. 1, p. 31-39, https://doi.org/10.1016/0146-6380(87)90049-0.","productDescription":"9 p.","startPage":"31","endPage":"39","costCenters":[],"links":[{"id":225881,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Virginia, Washington","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[-75.973607,37.835817],[-75.982158,37.806226],[-75.9983,37.812626],[-75.999658,37.848198],[-75.973607,37.835817]]],[[[-76.029405,37.953776],[-75.994739,37.953501],[-76.032491,37.915008],[-76.04653,37.953586],[-76.029405,37.953776]]],[[[-75.242266,38.027209],[-75.359036,37.864143],[-75.437868,37.872324],[-75.514921,37.799149],[-75.581333,37.683593],[-75.610808,37.605909],[-75.612237,37.585602],[-75.594044,37.569698],[-75.666178,37.472124],[-75.665957,37.439209],[-75.720739,37.373129],[-75.735829,37.335426],[-75.778817,37.297176],[-75.798448,37.296285],[-75.790386,37.231225],[-75.800468,37.201029],[-75.897298,37.118037],[-75.912308,37.115154],[-75.92552,37.133601],[-75.97043,37.118608],[-76.025753,37.257407],[-76.018645,37.31782],[-75.987122,37.368548],[-75.981624,37.434116],[-75.960877,37.467562],[-75.924756,37.600215],[-75.868481,37.668224],[-75.859262,37.703111],[-75.837685,37.712985],[-75.803041,37.762464],[-75.818125,37.791698],[-75.784599,37.806826],[-75.743097,37.806656],[-75.689837,37.861817],[-75.687584,37.88634],[-75.709626,37.900622],[-75.757694,37.903912],[-75.712065,37.936082],[-75.693942,37.930362],[-75.669711,37.950796],[-75.647606,37.947027],[-75.648229,37.966775],[-75.625612,37.9898],[-75.242266,38.027209]]],[[[-77.041898,38.741514],[-77.053199,38.709915],[-77.079499,38.709515],[-77.132501,38.673816],[-77.1302,38.635017],[-77.202002,38.617217],[-77.216303,38.637817],[-77.246704,38.635217],[-77.247003,38.590618],[-77.26443,38.582845],[-77.26083,38.56533],[-77.310334,38.493926],[-77.32544,38.44885],[-77.310719,38.397669],[-77.317288,38.383576],[-77.279633,38.339444],[-77.240072,38.331598],[-77.162692,38.345994],[-77.138224,38.367917],[-77.08481,38.368297],[-77.043526,38.400548],[-77.011827,38.374554],[-77.030683,38.311623],[-76.96215,38.256486],[-76.962311,38.214075],[-76.838795,38.163476],[-76.760241,38.166581],[-76.721722,38.137635],[-76.701297,38.155718],[-76.613939,38.148587],[-76.600937,38.110084],[-76.543155,38.076971],[-76.516547,38.026566],[-76.469343,38.013544],[-76.416299,37.966828],[-76.343848,37.947345],[-76.236725,37.889174],[-76.251358,37.833072],[-76.275178,37.812664],[-76.293525,37.822717],[-76.307482,37.81235],[-76.312858,37.720338],[-76.300067,37.695364],[-76.339892,37.655966],[-76.292534,37.636098],[-76.279447,37.618225],[-76.36232,37.610368],[-76.472392,37.665772],[-76.489576,37.666201],[-76.510187,37.642324],[-76.536548,37.663574],[-76.537228,37.698892],[-76.584289,37.76889],[-76.651413,37.796239],[-76.680197,37.825654],[-76.701606,37.822677],[-76.747552,37.875864],[-76.784618,37.869569],[-76.723863,37.788503],[-76.689773,37.78519],[-76.680922,37.759647],[-76.663887,37.751887],[-76.61971,37.744795],[-76.61997,37.731271],[-76.597213,37.717269],[-76.574049,37.646781],[-76.542666,37.616857],[-76.435474,37.612807],[-76.410781,37.581815],[-76.300144,37.561734],[-76.360474,37.51924],[-76.32947,37.49492],[-76.306952,37.497488],[-76.293599,37.516499],[-76.265056,37.481365],[-76.245283,37.386839],[-76.275552,37.309964],[-76.337476,37.364014],[-76.415167,37.402133],[-76.418176,37.385064],[-76.445333,37.36646],[-76.406388,37.332924],[-76.381075,37.28534],[-76.352556,37.278334],[-76.429141,37.25331],[-76.48284,37.254831],[-76.50364,37.233856],[-76.471799,37.216016],[-76.394132,37.22515],[-76.394756,37.157568],[-76.348658,37.170655],[-76.334017,37.144223],[-76.292344,37.126615],[-76.271262,37.084544],[-76.304272,37.001378],[-76.34011,37.015212],[-76.411768,36.962847],[-76.428869,36.969947],[-76.464471,37.027547],[-76.518242,37.055351],[-76.526203,37.077773],[-76.564219,37.077507],[-76.618252,37.119347],[-76.622252,37.142146],[-76.604476,37.160034],[-76.623292,37.198738],[-76.649869,37.220914],[-76.730951,37.213813],[-76.75047,37.190098],[-76.780532,37.209336],[-76.802511,37.198308],[-76.73032,37.145395],[-76.715295,37.148035],[-76.685614,37.198851],[-76.663774,37.173875],[-76.671588,37.14206],[-76.656894,37.109843],[-76.669822,37.06426],[-76.662558,37.045748],[-76.586491,37.02874],[-76.500355,36.965212],[-76.469914,36.882898],[-76.454692,36.884077],[-76.441605,36.906116],[-76.387567,36.899547],[-76.385867,36.923247],[-76.333158,36.917293],[-76.327365,36.959447],[-76.285063,36.968747],[-76.22166,36.939547],[-76.095508,36.908817],[-76.033454,36.931946],[-75.996252,36.922047],[-75.94955,36.76115],[-75.867044,36.550754],[-80.122183,36.542646],[-81.677535,36.588117],[-81.6469,36.611918],[-81.922644,36.616213],[-81.934144,36.594213],[-83.670128,36.600764],[-83.648314,36.622683],[-83.529612,36.666184],[-83.423707,36.667385],[-83.307103,36.711387],[-83.136395,36.743088],[-83.125728,36.761276],[-83.131694,36.781488],[-83.07559,36.850589],[-83.006086,36.847889],[-82.878569,36.889585],[-82.858635,36.927785],[-82.864909,36.97901],[-82.726279,37.042098],[-82.722097,37.120168],[-82.498858,37.227044],[-82.355343,37.26522],[-81.968297,37.537798],[-81.946022,37.531742],[-81.944756,37.513657],[-81.926391,37.514207],[-81.992916,37.482969],[-81.995649,37.469833],[-81.987006,37.454878],[-81.938843,37.440463],[-81.923481,37.411379],[-81.936744,37.38073],[-81.928497,37.360645],[-81.860267,37.315715],[-81.853551,37.287701],[-81.761752,37.275713],[-81.739277,37.238837],[-81.719554,37.237785],[-81.678603,37.202467],[-81.5536,37.208443],[-81.508786,37.232564],[-81.498874,37.258025],[-81.483559,37.250604],[-81.416663,37.273214],[-81.394287,37.316411],[-81.374455,37.318614],[-81.366315,37.335927],[-81.225104,37.234874],[-81.112596,37.278497],[-80.979589,37.302279],[-80.966556,37.292158],[-80.900535,37.315],[-80.849451,37.346909],[-80.883248,37.383933],[-80.859563,37.429558],[-80.784188,37.394587],[-80.770082,37.372363],[-80.552036,37.473563],[-80.515139,37.478566],[-80.492981,37.457749],[-80.494867,37.43507],[-80.475601,37.422949],[-80.366838,37.484879],[-80.309331,37.50288],[-80.282385,37.533517],[-80.330306,37.536244],[-80.314464,37.54412],[-80.328504,37.564315],[-80.240272,37.606961],[-80.220984,37.627767],[-80.270352,37.648929],[-80.296138,37.691783],[-80.253077,37.725899],[-80.257411,37.756084],[-80.216498,37.776445],[-80.227092,37.798886],[-80.179391,37.839751],[-80.162202,37.875122],[-80.117747,37.89772],[-80.002507,37.992767],[-79.954369,38.080397],[-79.92633,38.107151],[-79.944843,38.131585],[-79.918662,38.15479],[-79.917061,38.183741],[-79.790134,38.267654],[-79.810115,38.305037],[-79.764432,38.356514],[-79.725804,38.366128],[-79.72635,38.38707],[-79.689675,38.431439],[-79.696959,38.484574],[-79.663474,38.514117],[-79.669275,38.549516],[-79.649075,38.591515],[-79.53687,38.550917],[-79.476638,38.457228],[-79.312276,38.411876],[-79.280149,38.42076],[-79.210591,38.492913],[-79.205859,38.524521],[-79.170958,38.56812],[-79.131057,38.653217],[-79.092955,38.659517],[-79.085455,38.724614],[-79.057554,38.760213],[-79.055654,38.783013],[-79.027253,38.792113],[-78.998171,38.847353],[-78.869276,38.762991],[-78.786025,38.887187],[-78.718482,38.934267],[-78.718647,38.904561],[-78.69738,38.915602],[-78.629553,38.980866],[-78.601655,38.964603],[-78.554919,39.015124],[-78.571901,39.031995],[-78.403697,39.167451],[-78.436662,39.196658],[-78.399669,39.243874],[-78.414204,39.26391],[-78.338958,39.349889],[-78.362267,39.357784],[-78.343214,39.388807],[-78.359352,39.412534],[-78.346718,39.427618],[-78.347087,39.466012],[-77.828157,39.132329],[-77.730047,39.315666],[-77.675846,39.324192],[-77.615939,39.302722],[-77.56321,39.303903],[-77.540581,39.264947],[-77.486813,39.247586],[-77.457943,39.222023],[-77.478596,39.189168],[-77.516426,39.170891],[-77.519929,39.120925],[-77.4858,39.109303],[-77.452827,39.072468],[-77.340287,39.062991],[-77.293105,39.046508],[-77.248403,39.026909],[-77.255703,39.002409],[-77.234803,38.97631],[-77.137701,38.95531],[-77.1034,38.912911],[-77.070099,38.900711],[-77.040599,38.871212],[-77.031698,38.850512],[-77.044899,38.834712],[-77.041898,38.741514]]],[[[-122.519535,48.288314],[-122.551793,48.281512],[-122.584086,48.297987],[-122.618466,48.294159],[-122.623779,48.269431],[-122.652639,48.265081],[-122.668385,48.223967],[-122.63126,48.220686],[-122.588138,48.18594],[-122.558205,48.119579],[-122.571615,48.105113],[-122.54512,48.05255],[-122.516314,48.057181],[-122.511081,48.075301],[-122.525422,48.096537],[-122.513276,48.097538],[-122.491104,48.094242],[-122.431266,48.045001],[-122.376259,48.034457],[-122.373263,48.000791],[-122.349597,47.958796],[-122.380497,47.904023],[-122.431035,47.914732],[-122.445519,47.930226],[-122.446682,47.963155],[-122.47266,47.988449],[-122.546824,47.967215],[-122.541564,47.992998],[-122.607342,48.030992],[-122.593621,48.0472],[-122.614028,48.072788],[-122.598301,48.110616],[-122.609568,48.15186],[-122.633167,48.163281],[-122.677337,48.154587],[-122.693084,48.181509],[-122.770045,48.224395],[-122.72259,48.304268],[-122.673731,48.354683],[-122.664659,48.401508],[-122.627809,48.3972],[-122.60198,48.409907],[-122.585038,48.395166],[-122.585162,48.353304],[-122.506568,48.310041],[-122.519535,48.288314]]],[[[-122.474684,47.511068],[-122.452399,47.503471],[-122.460027,47.48686],[-122.433385,47.46643],[-122.437656,47.407424],[-122.373628,47.388718],[-122.437809,47.365606],[-122.453997,47.343337],[-122.51885,47.33332],[-122.526733,47.398581],[-122.513328,47.449106],[-122.474684,47.511068]]],[[[-122.695907,48.737273],[-122.663259,48.697077],[-122.618225,48.670721],[-122.609576,48.645018],[-122.673538,48.680809],[-122.691795,48.711498],[-122.718833,48.716818],[-122.715709,48.748672],[-122.695907,48.737273]]],[[[-123.035393,49.002154],[-123.028091,48.973943],[-123.083834,48.976139],[-123.090546,49.001976],[-123.035393,49.002154]]],[[[-122.800217,48.60169],[-122.801096,48.585425],[-122.771206,48.562426],[-122.788503,48.530393],[-122.779124,48.508911],[-122.816332,48.487841],[-122.81973,48.458843],[-122.802509,48.433098],[-122.812208,48.422326],[-122.874135,48.418196],[-122.893646,48.422655],[-122.889016,48.435947],[-122.928004,48.439966],[-122.91646,48.453263],[-122.926901,48.460874],[-122.962009,48.451161],[-123.039156,48.460003],[-123.119451,48.492576],[-123.163234,48.529544],[-123.173061,48.579086],[-123.203026,48.596178],[-123.178425,48.622115],[-123.107362,48.622451],[-123.101552,48.59782],[-123.048403,48.569216],[-122.987296,48.561895],[-122.995026,48.578162],[-123.034101,48.591767],[-123.024902,48.594484],[-123.048652,48.621002],[-122.941316,48.702904],[-122.894599,48.71503],[-122.743049,48.661991],[-122.809622,48.619035],[-122.800217,48.60169]]],[[[-123.197953,48.68466],[-123.14799,48.668001],[-123.106165,48.633473],[-123.237148,48.683466],[-123.197953,48.68466]]],[[[-123.025486,48.717966],[-123.009787,48.722291],[-123.005086,48.694342],[-123.021215,48.681416],[-123.042337,48.675663],[-123.035672,48.68535],[-123.047058,48.695772],[-123.070427,48.699971],[-123.025486,48.717966]]],[[[-122.649405,48.588457],[-122.578856,48.54813],[-122.572967,48.529028],[-122.649256,48.528769],[-122.649405,48.588457]]],[[[-122.714512,48.60878],[-122.670638,48.568812],[-122.68944,48.543903],[-122.717278,48.539739],[-122.73944,48.573893],[-122.714512,48.60878]]],[[[-122.699266,48.621115],[-122.674173,48.629944],[-122.657016,48.609891],[-122.699266,48.621115]]],[[[-122.418268,47.320614],[-122.324833,47.348521],[-122.328434,47.400621],[-122.348035,47.415921],[-122.355135,47.441921],[-122.383136,47.450521],[-122.361336,47.481421],[-122.396538,47.51522],[-122.398338,47.55012],[-122.421139,47.57602],[-122.387139,47.59572],[-122.370167,47.583087],[-122.339513,47.599113],[-122.429841,47.658919],[-122.37314,47.729219],[-122.396422,47.777927],[-122.394944,47.803318],[-122.33595,47.852306],[-122.307048,47.949117],[-122.230046,47.970917],[-122.224979,48.016626],[-122.343241,48.097631],[-122.363842,48.12393],[-122.362044,48.187568],[-122.395499,48.228551],[-122.449605,48.232598],[-122.441731,48.211776],[-122.478535,48.188087],[-122.479008,48.175703],[-122.358375,48.056133],[-122.377114,48.057568],[-122.4675,48.130353],[-122.486736,48.12095],[-122.512031,48.133931],[-122.53722,48.183745],[-122.530996,48.249821],[-122.480925,48.251706],[-122.466803,48.269604],[-122.406516,48.25183],[-122.371693,48.287839],[-122.408718,48.326413],[-122.533452,48.383409],[-122.554536,48.40604],[-122.557298,48.444438],[-122.649839,48.408526],[-122.678928,48.439466],[-122.654844,48.454087],[-122.657753,48.47294],[-122.689121,48.476849],[-122.700603,48.457632],[-122.710362,48.461584],[-122.712981,48.47879],[-122.684521,48.509123],[-122.606961,48.522152],[-122.568071,48.50821],[-122.537355,48.466749],[-122.500721,48.460887],[-122.471832,48.470724],[-122.498463,48.556206],[-122.534719,48.574246],[-122.495904,48.575927],[-122.482406,48.559653],[-122.44456,48.570115],[-122.425271,48.599522],[-122.500308,48.656163],[-122.519172,48.713095],[-122.490401,48.751128],[-122.535803,48.776128],[-122.596844,48.771492],[-122.637146,48.735708],[-122.612562,48.714932],[-122.605733,48.701066],[-122.615169,48.693839],[-122.673472,48.733082],[-122.645743,48.781538],[-122.693683,48.804475],[-122.709815,48.786205],[-122.717073,48.84719],[-122.793175,48.892927],[-122.751289,48.911239],[-122.746596,48.930731],[-122.822464,48.944911],[-122.75802,49.002357],[-117.032351,48.999188],[-117.042657,47.760857],[-117.034696,46.418318],[-117.062748,46.353624],[-117.027744,46.338751],[-117.020663,46.314793],[-116.98463,46.292705],[-116.987391,46.272865],[-116.955264,46.23088],[-116.965841,46.203417],[-116.921258,46.164795],[-116.955263,46.102237],[-116.981962,46.084915],[-116.942656,46.061],[-116.91868,45.999875],[-118.987129,45.999855],[-119.027056,45.969134],[-119.12612,45.932859],[-119.19553,45.92787],[-119.25715,45.939926],[-119.487829,45.906307],[-119.571584,45.925456],[-119.600549,45.919581],[-119.669877,45.856867],[-119.965744,45.824365],[-120.170453,45.761951],[-120.210754,45.725951],[-120.482362,45.694449],[-120.559465,45.738348],[-120.634968,45.745847],[-120.68937,45.715847],[-120.855674,45.671545],[-120.895575,45.642945],[-120.943977,45.656445],[-121.06437,45.652549],[-121.145534,45.607886],[-121.196556,45.616689],[-121.215779,45.671238],[-121.33777,45.704949],[-121.423592,45.69399],[-121.533106,45.726541],[-121.707358,45.694809],[-121.811304,45.706761],[-121.867167,45.693277],[-121.908267,45.654399],[-121.979797,45.624839],[-122.101675,45.583516],[-122.183695,45.577696],[-122.262625,45.544321],[-122.331502,45.548241],[-122.380302,45.575941],[-122.438674,45.563585],[-122.675008,45.618039],[-122.76381,45.657138],[-122.774511,45.680437],[-122.761451,45.759163],[-122.795605,45.81],[-122.785026,45.867699],[-122.81151,45.912725],[-122.813998,45.960984],[-122.878092,46.031281],[-122.904119,46.083734],[-123.004233,46.133823],[-123.115904,46.185268],[-123.166414,46.188973],[-123.280166,46.144843],[-123.371433,46.146372],[-123.430847,46.181827],[-123.427629,46.229348],[-123.474844,46.267831],[-123.547659,46.259109],[-123.669501,46.266832],[-123.680574,46.296025],[-123.700764,46.305278],[-123.766682,46.273499],[-123.806139,46.283588],[-123.875525,46.239787],[-123.919581,46.251217],[-123.974509,46.303063],[-124.001264,46.31326],[-124.020551,46.315737],[-124.044018,46.275925],[-124.080671,46.267239],[-124.057425,46.409315],[-124.069583,46.630651],[-124.048444,46.645827],[-124.035874,46.630822],[-124.052708,46.622796],[-124.023566,46.582559],[-124.026032,46.462978],[-123.990615,46.463019],[-123.988386,46.497008],[-123.97083,46.47537],[-123.943667,46.477197],[-123.894254,46.537028],[-123.928861,46.588875],[-123.955556,46.60357],[-123.960642,46.636364],[-123.921913,46.650262],[-123.923269,46.672708],[-123.851356,46.70256],[-123.84621,46.716795],[-123.898641,46.750205],[-123.916371,46.741322],[-123.916874,46.726739],[-123.974994,46.733391],[-123.966886,46.705184],[-124.003458,46.702337],[-124.092176,46.741624],[-124.108078,46.836388],[-124.138225,46.905534],[-124.110641,46.91252],[-124.093392,46.901168],[-124.089286,46.867716],[-124.073113,46.861493],[-124.055085,46.870429],[-124.049279,46.891253],[-123.985082,46.921916],[-123.86018,46.948556],[-123.898245,46.971927],[-124.012218,46.985176],[-124.019727,46.991189],[-124.005248,47.003915],[-124.026345,47.030187],[-124.122057,47.04165],[-124.151288,47.021112],[-124.124386,46.94387],[-124.180111,46.926357],[-124.169113,46.994508],[-124.182802,47.134041],[-124.236349,47.287287],[-124.271193,47.305025],[-124.299943,47.34836],[-124.319379,47.355559],[-124.355955,47.545698],[-124.425195,47.738434],[-124.453927,47.765334],[-124.47657,47.769671],[-124.489737,47.816988],[-124.539927,47.836967],[-124.559034,47.863085],[-124.625512,47.887963],[-124.672427,47.964414],[-124.696542,48.069274],[-124.687101,48.098657],[-124.731746,48.169997],[-124.696111,48.198599],[-124.690389,48.219745],[-124.705031,48.238774],[-124.684677,48.255228],[-124.65894,48.331057],[-124.730863,48.3762],[-124.716947,48.389776],[-124.599278,48.381035],[-124.395593,48.288772],[-124.361351,48.287582],[-124.272017,48.25441],[-124.238582,48.262471],[-124.101773,48.216883],[-124.107215,48.200082],[-124.050734,48.177747],[-123.981032,48.164761],[-123.858821,48.154273],[-123.672445,48.162715],[-123.628819,48.139279],[-123.590839,48.134949],[-123.551131,48.151382],[-123.507235,48.131807],[-123.440128,48.142014],[-123.441972,48.124259],[-123.424668,48.118065],[-123.332699,48.11297],[-123.239129,48.118217],[-123.133445,48.177276],[-123.143229,48.156633],[-123.06621,48.120469],[-123.038727,48.081138],[-122.929095,48.096244],[-122.917942,48.091535],[-122.927975,48.06665],[-122.877641,48.047025],[-122.849273,48.053808],[-122.878255,48.076072],[-122.876282,48.110877],[-122.833173,48.134406],[-122.760448,48.14324],[-122.748911,48.117026],[-122.801399,48.087561],[-122.770496,48.047897],[-122.74229,48.049324],[-122.747389,48.070795],[-122.733257,48.091232],[-122.68724,48.101662],[-122.669868,48.017217],[-122.723374,48.008095],[-122.718082,47.987739],[-122.6788,47.96793],[-122.681924,47.936415],[-122.651063,47.920985],[-122.646494,47.894771],[-122.610341,47.887343],[-122.650083,47.86386],[-122.69376,47.868002],[-122.683742,47.838773],[-122.748061,47.800546],[-122.758498,47.746036],[-122.781682,47.70392],[-122.811929,47.679861],[-122.832139,47.695511],[-122.790619,47.792597],[-122.812616,47.840029],[-122.820178,47.835904],[-122.815027,47.807493],[-122.845612,47.777474],[-122.896524,47.674838],[-122.97244,47.6149],[-123.106486,47.45817],[-123.15598,47.355745],[-123.140169,47.347496],[-123.111298,47.362619],[-123.120234,47.39149],[-122.967284,47.585685],[-122.856611,47.649615],[-122.754186,47.671612],[-122.740159,47.736228],[-122.714801,47.768176],[-122.608105,47.856728],[-122.573672,47.857582],[-122.588235,47.912923],[-122.620316,47.931553],[-122.603861,47.940478],[-122.592184,47.922519],[-122.527593,47.905882],[-122.506122,47.831745],[-122.482529,47.815511],[-122.495458,47.786692],[-122.470333,47.757109],[-122.488491,47.743605],[-122.554454,47.745704],[-122.543161,47.710941],[-122.504604,47.699136],[-122.518277,47.65132],[-122.493205,47.635122],[-122.49824,47.598242],[-122.479089,47.583654],[-122.543118,47.556326],[-122.547207,47.528257],[-122.494882,47.510265],[-122.530514,47.469041],[-122.531889,47.428827],[-122.551136,47.394456],[-122.537044,47.375896],[-122.573739,47.318419],[-122.547521,47.285344],[-122.589454,47.227618],[-122.611464,47.2181],[-122.697378,47.283969],[-122.671256,47.343774],[-122.632463,47.376394],[-122.671486,47.366876],[-122.725738,47.33047],[-122.749621,47.276408],[-122.644182,47.209177],[-122.711997,47.127681],[-122.771619,47.167109],[-122.832799,47.243412],[-122.799025,47.289306],[-122.796646,47.341654],[-122.821868,47.363069],[-122.822344,47.319763],[-122.863732,47.270221],[-122.838298,47.208353],[-122.858735,47.167955],[-122.814238,47.179482],[-122.775056,47.123114],[-122.721437,47.103179],[-122.67813,47.103866],[-122.614855,47.169143],[-122.590829,47.178107],[-122.527586,47.291531],[-122.547747,47.316403],[-122.4442,47.266723],[-122.409199,47.288556],[-122.444635,47.300421],[-122.418268,47.320614]]]]},\"properties\":{\"name\":\"Virginia\",\"nation\":\"USA  \"}}]}","volume":"11","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f596e4b0c8380cd4c2d4","contributors":{"authors":[{"text":"Hatcher, Patrick G.","contributorId":93625,"corporation":false,"usgs":true,"family":"Hatcher","given":"Patrick","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":367870,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":1003568,"text":"1003568 - 1987 - Paint chip poisoning of Laysan albatross at Midway Atoll","interactions":[],"lastModifiedDate":"2018-03-23T16:44:35","indexId":"1003568","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2507,"text":"Journal of Wildlife Diseases","active":true,"publicationSubtype":{"id":10}},"title":"Paint chip poisoning of Laysan albatross at Midway Atoll","docAbstract":"<p>Epizootic mortality occurred in Laysan albatross (Diomedea immutabilis) fledgings at Midway Atoll in 1983. Heavy metal toxicity from ingestion of weathered paint chips was one of the causes. Sick albatrosses were unable to retract their wings, causing a 'droop-wing' appearance. Five normal and 12 droop-winged fledglings were captured, killed, and examined. Paint chips found in the proventriculus of the affected fledglings contained up to 144,000 ppm lead. Blood, liver, and kidney concentrations of lead in affected birds were higher than in normal fledglings, and acid-fast intranuclear inclusion bodies were present in the kidneys. Degenerative lesions were present in the myelin of some brachial nerves. Weathered paint samples collected from 12 buildings contained up to 247,250 ppm lead and 101 ppm mercury. Lead poisoning was diagnosed in 10 of the droop-winged albatrosses and was one of the causes of morbidity. Mercury toxicosis and plastic impaction were other possible causes.</p>","language":"English","publisher":"Wildlife Disease Association","doi":"10.7589/0090-3558-23.3.432","usgsCitation":"Sileo, L., and Fefer, S., 1987, Paint chip poisoning of Laysan albatross at Midway Atoll: Journal of Wildlife Diseases, v. 23, no. 3, p. 432-437, https://doi.org/10.7589/0090-3558-23.3.432.","productDescription":"6 p.","startPage":"432","endPage":"437","numberOfPages":"6","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"links":[{"id":129455,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Midway Atoll","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -177.39709854125977,\n              28.191572242948894\n            ],\n            [\n              -177.38525390625,\n              28.194446860487773\n            ],\n            [\n              -177.3694610595703,\n              28.198380422361005\n            ],\n            [\n              -177.36122131347656,\n              28.204431773289066\n            ],\n            [\n              -177.35109329223633,\n              28.20382665361861\n            ],\n            [\n              -177.3426818847656,\n              28.202465121829064\n            ],\n            [\n              -177.32980728149414,\n              28.201859991020026\n            ],\n            [\n              -177.32242584228516,\n              28.205188168057337\n            ],\n            [\n              -177.32122421264648,\n              28.20866751501297\n            ],\n            [\n              -177.32276916503906,\n              28.216987232971377\n            ],\n            [\n              -177.32791900634766,\n              28.22001242425808\n            ],\n            [\n              -177.33083724975583,\n              28.21986116672942\n            ],\n            [\n              -177.33152389526364,\n              28.216382184428756\n            ],\n            [\n              -177.33701705932617,\n              28.21214674864004\n            ],\n            [\n              -177.35246658325195,\n              28.21063405229304\n            ],\n            [\n              -177.35572814941406,\n              28.211087863446703\n            ],\n            [\n              -177.3625946044922,\n              28.218802358028878\n            ],\n            [\n              -177.3691177368164,\n              28.222130007158537\n            ],\n            [\n              -177.37667083740234,\n              28.22091996492988\n            ],\n            [\n              -177.38164901733398,\n              28.21986116672942\n            ],\n            [\n              -177.38662719726562,\n              28.218197319771487\n            ],\n            [\n              -177.38988876342773,\n              28.216987232971377\n            ],\n            [\n              -177.3904037475586,\n              28.21441575298859\n            ],\n            [\n              -177.39023208618164,\n              28.210180239211223\n            ],\n            [\n              -177.39229202270508,\n              28.20760859532738\n            ],\n            [\n              -177.39812850952148,\n              28.20064971912046\n            ],\n            [\n              -177.3991584777832,\n              28.198682998046667\n            ],\n            [\n              -177.3991584777832,\n              28.19429556675524\n            ],\n            [\n              -177.39709854125977,\n              28.191572242948894\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"23","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae4e4b07f02db689d1a","contributors":{"authors":[{"text":"Sileo, L.","contributorId":46895,"corporation":false,"usgs":true,"family":"Sileo","given":"L.","email":"","affiliations":[],"preferred":false,"id":313551,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fefer, S.I.","contributorId":90244,"corporation":false,"usgs":false,"family":"Fefer","given":"S.I.","email":"","affiliations":[{"id":6654,"text":"USFWS","active":true,"usgs":false}],"preferred":false,"id":313552,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014691,"text":"70014691 - 1987 - Trend analysis of monthly sulfur dioxide emissions in the conterminous United States, 1975-1984","interactions":[],"lastModifiedDate":"2023-02-09T17:11:23.154763","indexId":"70014691","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":924,"text":"Atmospheric Environment","active":true,"publicationSubtype":{"id":10}},"title":"Trend analysis of monthly sulfur dioxide emissions in the conterminous United States, 1975-1984","docAbstract":"Trends in monthly sulfur dioxide emissions for the 48 conterminous United States during the decade 1975-1984 are identified using a robust nonparametric procedure. Statistically significant downward trends are indicated in 32 States, upward trends appear in 10 States, and no significant trend is apparent in six States. Geographically, a distinct regional pattern of emission increases and decreases is evident with declines dominating the Eastern and Western States; increases aligning longitudinally from border to border in most of the Great Plains States, in several New England States, and in Georgia; and no trends frequently occurring in proximity to the upward trending emissions in the Plains States. A time-series decomposition of the monthly values indicates that one distinct emissions pattern commonly occurred through the period of record. This pattern is characterized by an initial emissions increase that peaks between 1977 and 1978, followed by a shallow and undulating decrease though the end of 1984. It is suggested that this signature represents the 'national' trend for the period. In addition, five regions of coherent sulfur dioxide emissions behavior are defined on the basis of seasonal occurrence of maximum and minimum emission loadings. A winter-summer, latitudinal opposition is apparent in the timing of emissions maxima, whereas an equinox-summer, longitudinal opposition is apparent in the timing of emissions minima.Trends in monthly sulfur dioxide emissions for the 48 conterminous United States during the decade 1975-1984 are identified using a robust nonparametric procedure. Statistically significant downward trends are indicated in 32 States, upward trends appear in 10 States, and no significant trend is apparent in six States. Geographically, a distinct regional pattern of emission increases and decreases is evident with declines dominating the Eastern and Western States; increases aligning longitudinally from border to border in most of the Great Plains States, in several New England States, and in Georgia; and no trends frequently occurring in proximity to the upward trending emissions in the Plains States. A time-series decomposition of the monthly values indicates that one distinct emissions pattern commonly occurred through the period of record. This pattern is characterized by an initial emissions increase that peaks between 1977 and 1978, followed by a shallow and undulating decrease through the end of 1984. It is suggested that this signature represents the 'national' trend for the period. Additional study results are discussed.","language":"English","publisher":"Elsevier","doi":"10.1016/0004-6981(87)90365-9","issn":"00046981","usgsCitation":"Lins, H., 1987, Trend analysis of monthly sulfur dioxide emissions in the conterminous United States, 1975-1984: Atmospheric Environment, v. 21, no. 11, p. 2297-2309, https://doi.org/10.1016/0004-6981(87)90365-9.","productDescription":"13 p.","startPage":"2297","endPage":"2309","costCenters":[],"links":[{"id":225271,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[-75.867044,36.550754],[-75.536428,35.780118],[-75.723662,36.003139],[-75.85147,36.415785],[-76.019261,36.503506],[-75.793974,36.07171],[-75.922344,36.244122],[-75.904999,36.164188],[-76.184702,36.298166],[-76.064224,36.143775],[-76.447812,36.192514],[-76.298733,36.1012],[-76.514335,36.00564],[-76.676484,36.043612],[-76.693253,36.278357],[-76.7521,36.147328],[-76.667547,35.933509],[-76.024162,35.970891],[-76.04015,35.65131],[-75.947293,35.959835],[-75.80935,35.959308],[-75.71294,35.69849],[-75.775328,35.579335],[-75.895045,35.573152],[-76.149655,35.326411],[-76.485762,35.371375],[-76.586349,35.508957],[-76.471207,35.55742],[-76.634468,35.510332],[-76.580187,35.387113],[-77.023912,35.514802],[-76.467776,35.276951],[-76.60042,35.067867],[-76.801426,34.964369],[-76.982904,35.060607],[-76.762931,34.920374],[-76.463468,35.076411],[-76.395625,34.975179],[-76.288354,35.005726],[-76.524712,34.681964],[-76.604796,34.787482],[-76.673619,34.71491],[-76.523303,34.652271],[-76.038648,35.065045],[-76.535946,34.588577],[-76.726969,34.69669],[-77.169701,34.622023],[-77.740136,34.272546],[-77.970606,33.844517],[-78.276147,33.912364],[-78.772737,33.768511],[-79.084588,33.483669],[-79.18787,33.173712],[-79.359961,33.006672],[-79.55756,33.021269],[-79.576006,32.906235],[-79.999374,32.611851],[-80.472068,32.496964],[-80.455192,32.326458],[-80.858735,32.099581],[-80.862814,31.969346],[-81.203572,31.719448],[-81.133493,31.623348],[-81.260076,31.54828],[-81.177254,31.517074],[-81.288403,31.211065],[-81.493651,30.977528],[-81.403409,30.957914],[-81.447087,30.503679],[-81.163581,29.55529],[-80.525094,28.459454],[-80.606874,28.336484],[-80.566432,28.09563],[-80.031362,26.796339],[-80.127987,25.772245],[-80.154972,25.66549],[-80.197674,25.74437],[-80.296719,25.622195],[-80.31036,25.3731],[-80.418872,25.235532],[-81.079859,25.118797],[-81.352731,25.822015],[-81.527665,25.901531],[-81.68954,25.85271],[-81.868983,26.378648],[-82.105672,26.48393],[-82.181565,26.681712],[-82.093023,26.665614],[-82.063126,26.950214],[-82.175241,26.916867],[-82.147068,26.789803],[-82.259867,26.717398],[-82.745748,27.538834],[-82.65072,27.523115],[-82.393383,27.837519],[-82.478063,27.92768],[-82.47244,27.822559],[-82.553946,27.848462],[-82.553918,27.966998],[-82.678606,27.993715],[-82.720395,27.937199],[-82.566819,27.858002],[-82.733076,27.612972],[-82.846526,27.854301],[-82.654138,28.590837],[-82.804736,29.146624],[-83.053207,29.130839],[-83.686423,29.923735],[-84.000716,30.096209],[-84.256439,30.103791],[-84.358923,30.058224],[-84.349066,29.896812],[-85.344768,29.654793],[-85.413575,29.85294],[-85.353885,29.684765],[-85.302591,29.808094],[-85.405052,29.938487],[-86.2987,30.363049],[-86.750906,30.391881],[-88.028401,30.221132],[-87.755263,30.277292],[-88.008396,30.684956],[-88.136173,30.320729],[-88.841328,30.409598],[-89.291444,30.303296],[-89.335942,30.374016],[-89.461275,30.174745],[-89.857558,30.004439],[-89.660568,29.862909],[-89.481926,30.079128],[-89.372375,30.054729],[-89.433411,29.991205],[-89.368019,29.911491],[-89.218071,29.97275],[-89.322289,29.887333],[-89.236298,29.877081],[-89.383789,29.838928],[-89.271034,29.756355],[-89.651237,29.749479],[-89.485367,29.624357],[-89.688141,29.615055],[-89.700501,29.515967],[-89.508551,29.386168],[-89.189354,29.345061],[-89.000674,29.180091],[-89.41148,28.925011],[-89.354798,29.072543],[-89.482844,29.215053],[-89.850305,29.311768],[-89.849642,29.477996],[-90.01251,29.462775],[-90.009678,29.294785],[-90.096038,29.240673],[-89.949925,29.263154],[-90.174273,29.105301],[-90.348768,29.057817],[-90.234235,29.110268],[-90.271251,29.204639],[-90.332796,29.276956],[-90.472489,29.192688],[-90.510555,29.290925],[-90.803699,29.063709],[-90.637495,29.066608],[-90.839345,29.039167],[-90.961278,29.180817],[-91.278792,29.247776],[-91.33275,29.305816],[-91.221166,29.436421],[-91.531021,29.531543],[-91.553537,29.632766],[-91.648941,29.633635],[-91.632829,29.742576],[-91.88075,29.710839],[-91.889118,29.836023],[-92.149349,29.697052],[-91.712002,29.56474],[-91.782387,29.482882],[-92.046316,29.584362],[-92.61627,29.578729],[-93.267456,29.778113],[-94.056506,29.671163],[-94.778691,29.361483],[-94.495025,29.525031],[-94.779674,29.530533],[-94.735271,29.785433],[-94.893107,29.661336],[-94.965963,29.70033],[-95.018253,29.554885],[-94.909898,29.49691],[-94.893994,29.30817],[-95.16525,29.113566],[-94.72253,29.331446],[-95.38239,28.866348],[-96.378616,28.383909],[-95.978526,28.650594],[-96.228909,28.580873],[-96.222802,28.698431],[-96.487943,28.569677],[-96.648758,28.709627],[-96.403973,28.44245],[-96.672677,28.335579],[-96.775985,28.405809],[-96.800413,28.224128],[-96.934765,28.123873],[-97.037008,28.185528],[-97.214039,28.087494],[-97.022806,28.107588],[-97.186709,27.825453],[-97.379042,27.837867],[-97.253955,27.696696],[-97.401942,27.335574],[-97.532223,27.278577],[-97.501688,27.366618],[-97.639094,27.253131],[-97.42408,27.264073],[-97.563266,26.842188],[-97.295072,26.108342],[-97.216954,25.993838],[-97.152009,26.062108],[-97.145567,25.971132],[-97.422636,25.840378],[-97.649176,26.021499],[-98.197046,26.056153],[-98.807348,26.369421],[-99.085126,26.398782],[-99.268613,26.843213],[-99.446524,27.023008],[-99.512219,27.568094],[-99.841708,27.766464],[-99.931812,27.980967],[-100.293468,28.278475],[-100.333814,28.499252],[-100.797671,29.246943],[-101.254895,29.520342],[-101.415402,29.756561],[-102.315389,29.87992],[-102.386678,29.76688],[-102.670971,29.741954],[-102.866846,29.225015],[-103.115328,28.98527],[-103.28119,28.982138],[-104.507568,29.639624],[-104.924796,30.604832],[-106.207837,31.468188],[-106.451541,31.764808],[-108.208394,31.783599],[-108.208573,31.333395],[-111.074825,31.332239],[-114.813613,32.494277],[-114.719633,32.718763],[-117.124862,32.534156],[-117.469794,33.296417],[-118.132698,33.753217],[-118.411211,33.741985],[-118.519514,34.027509],[-119.130169,34.100102],[-119.559459,34.413395],[-120.471376,34.447846],[-120.637805,34.56622],[-120.644311,35.139616],[-120.856047,35.206487],[-120.884757,35.430196],[-121.284973,35.674109],[-121.503112,36.000299],[-121.888491,36.30281],[-121.978592,36.580488],[-121.814462,36.682858],[-121.862266,36.931552],[-122.105976,36.955951],[-122.405073,37.195791],[-122.514483,37.780829],[-122.398139,37.80563],[-122.378545,37.605592],[-122.111344,37.50758],[-122.430087,37.963115],[-122.273006,38.07438],[-122.489974,38.112014],[-122.438268,37.880974],[-122.505383,37.822128],[-122.882114,38.025273],[-123.024066,37.994878],[-122.977082,38.267902],[-123.725367,38.917438],[-123.851714,39.832041],[-124.363414,40.260974],[-124.408601,40.443201],[-124.137066,40.925732],[-124.063076,41.439579],[-124.147412,41.717955],[-124.255994,41.783014],[-124.214213,42.005939],[-124.410982,42.250547],[-124.401177,42.627192],[-124.552441,42.840568],[-124.233534,43.55713],[-124.067569,44.428582],[-123.927891,46.009564],[-124.024305,46.229256],[-123.854801,46.157342],[-123.547636,46.265595],[-124.080671,46.267239],[-124.068655,46.634879],[-124.026032,46.462978],[-123.943667,46.477197],[-123.960642,46.636364],[-123.84621,46.716795],[-124.092176,46.741624],[-124.138225,46.905534],[-123.86018,46.948556],[-124.122057,47.04165],[-124.180111,46.926357],[-124.425195,47.738434],[-124.672427,47.964414],[-124.733174,48.163393],[-124.65894,48.331057],[-124.731828,48.381157],[-123.981032,48.164761],[-123.133445,48.177276],[-122.877641,48.047025],[-122.833173,48.134406],[-122.760448,48.14324],[-122.766648,48.04429],[-122.68724,48.101662],[-122.718082,47.987739],[-122.610341,47.887343],[-122.811929,47.679861],[-122.820178,47.835904],[-123.15598,47.355745],[-122.549072,47.919072],[-122.470333,47.757109],[-122.554454,47.745704],[-122.479089,47.583654],[-122.547521,47.285344],[-122.611464,47.2181],[-122.697378,47.283969],[-122.632463,47.376394],[-122.725738,47.33047],[-122.641802,47.205013],[-122.711997,47.127681],[-122.832799,47.243412],[-122.803688,47.355071],[-122.863732,47.270221],[-122.858735,47.167955],[-122.67813,47.103866],[-122.547747,47.316403],[-122.4442,47.266723],[-122.324833,47.348521],[-122.421139,47.57602],[-122.339513,47.599113],[-122.429841,47.658919],[-122.224979,48.016626],[-122.395499,48.228551],[-122.479008,48.175703],[-122.358375,48.056133],[-122.512031,48.133931],[-122.530996,48.249821],[-122.371693,48.287839],[-122.712322,48.464143],[-122.471832,48.470724],[-122.534719,48.574246],[-122.425271,48.599522],[-122.535803,48.776128],[-122.673472,48.733082],[-122.821631,48.941369],[-122.75802,49.002357],[-95.153711,48.998903],[-95.15335,49.383079],[-94.957465,49.370186],[-94.816222,49.320987],[-94.645083,48.744143],[-93.840754,48.628548],[-93.794454,48.516021],[-92.954876,48.631493],[-92.634931,48.542873],[-92.712562,48.463013],[-92.456325,48.414204],[-92.369174,48.220268],[-92.26228,48.354933],[-92.055228,48.359213],[-91.567254,48.043719],[-90.88548,48.245784],[-90.751608,48.090968],[-89.489226,48.014528],[-90.86827,47.5569],[-92.094089,46.787839],[-91.961889,46.682539],[-90.855874,46.962232],[-90.750952,46.890293],[-90.951476,46.597033],[-90.73726,46.692267],[-90.436512,46.561748],[-88.972802,47.002096],[-88.418841,47.371058],[-87.929672,47.478743],[-87.710471,47.4062],[-87.957058,47.38726],[-88.227552,47.199938],[-88.443901,46.972251],[-88.462349,46.786711],[-88.142807,46.966302],[-88.175197,46.90458],[-87.681561,46.842392],[-87.352448,46.501324],[-87.008724,46.532723],[-86.850111,46.434114],[-86.698139,46.438624],[-86.678182,46.561039],[-86.586168,46.463324],[-86.161681,46.669475],[-84.989497,46.772403],[-85.015211,46.479712],[-84.551496,46.418522],[-84.128925,46.530119],[-84.097766,46.256512],[-84.251424,46.175888],[-83.873147,45.993426],[-83.765277,46.018363],[-83.815826,46.108529],[-83.581315,46.089613],[-83.510623,45.929324],[-84.376429,45.931962],[-84.656567,46.052654],[-84.746985,45.835597],[-85.01399,46.010774],[-85.499422,46.09692],[-85.697203,45.960158],[-86.278007,45.942057],[-86.616893,45.606796],[-86.718191,45.67732],[-86.541464,45.890234],[-86.78208,45.860195],[-86.964275,45.672761],[-87.031435,45.837238],[-87.600796,45.146842],[-87.630298,44.976865],[-87.837647,44.933091],[-88.005518,44.539216],[-87.756048,44.649117],[-87.609784,44.838514],[-87.384821,44.865532],[-87.238426,45.166492],[-86.970355,45.278455],[-87.467089,44.553557],[-87.512903,44.192808],[-87.735436,43.882219],[-87.702685,43.687596],[-87.911787,43.250406],[-87.766675,42.784896],[-87.828569,42.269922],[-87.42344,41.642835],[-87.066033,41.661845],[-86.616978,41.896625],[-86.297168,42.358207],[-86.208654,42.69209],[-86.254646,43.083409],[-86.540916,43.633158],[-86.43114,43.815569],[-86.514704,44.057672],[-86.26871,44.345324],[-86.254996,44.691935],[-85.551072,45.210742],[-85.652355,44.849092],[-85.593833,44.768651],[-85.475204,44.991053],[-85.576566,44.760208],[-85.3958,44.931018],[-85.371593,45.270834],[-84.91585,45.393115],[-85.115479,45.539406],[-84.942636,45.714292],[-85.014509,45.760329],[-84.726192,45.786905],[-84.215268,45.634767],[-84.095905,45.497298],[-83.488826,45.355872],[-83.265896,45.026844],[-83.454168,45.03188],[-83.274747,44.714893],[-83.332533,44.340464],[-83.53771,44.248171],[-83.58409,44.056748],[-83.877047,43.959351],[-83.909479,43.672622],[-83.666052,43.591292],[-83.26153,43.973525],[-82.967439,44.066138],[-82.746255,43.996037],[-82.643166,43.852468],[-82.412965,42.977041],[-82.518782,42.613888],[-82.686417,42.518597],[-82.630851,42.673341],[-82.813518,42.640833],[-82.894013,42.389437],[-83.096521,42.290138],[-83.133511,42.088143],[-83.455626,41.727445],[-82.934369,41.514353],[-82.834101,41.587587],[-82.499099,41.381541],[-82.011966,41.515639],[-81.738755,41.48855],[-81.288892,41.758945],[-80.329976,42.036168],[-79.148723,42.553672],[-78.851355,42.791758],[-79.074467,43.077855],[-79.070469,43.262454],[-78.370221,43.376505],[-77.760231,43.341161],[-77.551022,43.235763],[-76.958402,43.270005],[-76.235834,43.529256],[-76.28272,43.858601],[-76.125023,43.912773],[-76.360306,44.070907],[-76.312647,44.199044],[-74.992756,44.977449],[-71.502487,45.013367],[-71.443882,45.235462],[-71.296509,45.29919],[-71.13943,45.242958],[-71.01081,45.34725],[-70.857042,45.22916],[-70.795009,45.428145],[-70.634661,45.383608],[-70.688214,45.563981],[-70.259117,45.890755],[-70.292736,46.191599],[-70.057061,46.415036],[-69.997086,46.69523],[-69.22442,47.459686],[-69.043947,47.427634],[-69.050334,47.256621],[-68.902425,47.178839],[-68.329879,47.36023],[-67.955669,47.199542],[-67.789461,47.062544],[-67.750422,45.917898],[-67.817892,45.693705],[-67.429716,45.583773],[-67.489464,45.282653],[-67.345585,45.126392],[-67.157919,45.161004],[-66.950569,44.814539],[-67.293403,44.599265],[-67.308538,44.707454],[-67.405492,44.594236],[-67.551133,44.621938],[-67.568159,44.531117],[-67.839896,44.558771],[-67.855108,44.419434],[-68.049334,44.33073],[-68.117746,44.475038],[-68.261708,44.484062],[-68.173608,44.328397],[-68.317588,44.225101],[-68.430946,44.298624],[-68.3791,44.430049],[-68.565161,44.39907],[-68.525302,44.227554],[-68.827197,44.31216],[-68.783679,44.473879],[-68.927452,44.448039],[-69.100863,44.104529],[-69.031878,44.079036],[-69.214205,43.935583],[-69.398455,43.971804],[-69.838689,43.70514],[-69.884066,43.778035],[-70.041351,43.738053],[-70.009869,43.859315],[-70.190014,43.771866],[-70.196911,43.565146],[-70.361214,43.52919],[-70.810069,42.909549],[-70.778671,42.693622],[-70.594014,42.63503],[-70.871382,42.546404],[-71.01568,42.326019],[-70.722269,42.207959],[-70.63848,42.081579],[-70.710034,41.999544],[-70.471552,41.761563],[-70.024734,41.787364],[-70.095595,42.032832],[-70.245385,42.063733],[-70.058531,42.040363],[-69.935952,41.809422],[-69.998071,41.54365],[-70.007011,41.671579],[-70.351634,41.634687],[-70.948431,41.409193],[-70.658659,41.543385],[-70.623652,41.707398],[-70.718739,41.73574],[-71.19302,41.457931],[-71.240709,41.619225],[-71.24071,41.474872],[-71.337695,41.448902],[-71.19564,41.67509],[-71.350057,41.727835],[-71.449318,41.687401],[-71.483295,41.371722],[-72.916827,41.282033],[-73.643478,41.002171],[-73.781369,40.794907],[-73.485365,40.946397],[-72.585327,40.997587],[-72.278789,41.158722],[-72.317238,41.088659],[-72.10216,40.991509],[-71.856214,41.070598],[-73.23914,40.6251],[-73.934512,40.545175],[-74.024543,40.709436],[-74.186027,40.646076],[-74.261889,40.464706],[-73.978282,40.440208],[-74.096906,39.76303],[-74.864458,38.94041],[-74.971995,38.94037],[-74.887167,39.158825],[-75.136548,39.179425],[-75.536431,39.460559],[-75.509342,39.685313],[-75.587147,39.651012],[-75.402035,39.066885],[-75.089473,38.797198],[-75.048939,38.451263],[-75.195382,38.093582],[-75.514921,37.799149],[-75.906734,37.114193],[-76.018645,37.31782],[-75.663095,37.961195],[-75.892686,37.916848],[-75.812913,38.058932],[-75.958786,38.135572],[-75.848473,38.20934],[-75.970514,38.233668],[-75.973876,38.36585],[-76.032044,38.216684],[-76.258189,38.318373],[-76.33636,38.492235],[-76.147158,38.63684],[-76.238685,38.735434],[-76.347998,38.686234],[-76.271575,38.851771],[-76.19343,38.821787],[-76.203638,38.928382],[-76.376031,38.848777],[-76.311766,39.035257],[-76.164004,38.99953],[-76.145174,39.092824],[-76.231765,39.018518],[-76.274741,39.164961],[-76.170588,39.331954],[-76.002408,39.367501],[-75.970337,39.557637],[-76.096072,39.536912],[-76.060988,39.447775],[-76.281374,39.304531],[-76.341443,39.354217],[-76.425281,39.205708],[-76.535885,39.211008],[-76.394358,39.01216],[-76.557535,38.744687],[-76.321499,38.03805],[-76.920778,38.291529],[-77.016371,38.445572],[-77.250172,38.382781],[-77.263599,38.512344],[-77.12634,38.6177],[-77.246704,38.635217],[-77.279633,38.339444],[-77.043526,38.400548],[-76.962311,38.214075],[-76.613939,38.148587],[-76.236725,37.889174],[-76.339892,37.655966],[-76.28037,37.613715],[-76.36232,37.610368],[-76.784618,37.869569],[-76.542666,37.616857],[-76.300144,37.561734],[-76.360474,37.51924],[-76.265056,37.481365],[-76.275552,37.309964],[-76.415167,37.402133],[-76.349489,37.273963],[-76.50364,37.233856],[-76.292344,37.126615],[-76.304272,37.001378],[-76.428869,36.969947],[-76.649869,37.220914],[-76.802511,37.198308],[-76.685614,37.198851],[-76.662558,37.045748],[-76.469914,36.882898],[-76.297663,36.968147],[-75.996252,36.922047],[-75.867044,36.550754]],[[-77.038598,38.791513],[-76.910795,38.891712],[-77.040999,38.99511],[-77.1199,38.934311],[-77.038598,38.791513]]],[[[-120.248484,33.999329],[-120.043259,34.035806],[-119.97026,33.944359],[-120.121817,33.895712],[-120.248484,33.999329]]],[[[-119.789798,34.05726],[-119.52064,34.034262],[-119.758141,33.959212],[-119.923337,34.069361],[-119.789798,34.05726]]],[[[-118.524531,32.895488],[-118.605534,33.030999],[-118.353504,32.821962],[-118.524531,32.895488]]],[[[-118.500212,33.449592],[-118.305084,33.310323],[-118.465368,33.326056],[-118.60403,33.47654],[-118.500212,33.449592]]],[[[-81.582923,24.658732],[-81.425483,24.752989],[-81.298028,24.656774],[-81.81289,24.546468],[-81.582923,24.658732]]],[[[-84.777208,29.707398],[-84.696726,29.76993],[-85.097082,29.625215],[-84.777208,29.707398]]],[[[-85.156415,29.679628],[-85.077237,29.670862],[-85.222546,29.678039],[-85.156415,29.679628]]],[[[-82.255777,26.703437],[-82.166042,26.489679],[-82.013913,26.452058],[-82.177017,26.471558],[-82.255777,26.703437]]],[[[-80.250581,25.34193],[-80.659395,24.897433],[-80.174544,25.518406],[-80.250581,25.34193]]],[[[-88.865067,29.752714],[-88.944435,29.658806],[-88.8312,29.878839],[-88.881454,30.053202],[-88.865067,29.752714]]],[[[-70.59628,41.471905],[-70.451084,41.348161],[-70.838777,41.347209],[-70.59628,41.471905]]],[[[-70.092142,41.297741],[-70.049053,41.391702],[-69.960181,41.264546],[-70.275526,41.310464],[-70.092142,41.297741]]],[[[-68.453236,44.189998],[-68.384903,44.154955],[-68.502096,44.152388],[-68.453236,44.189998]]],[[[-68.680773,44.279242],[-68.605906,44.230772],[-68.675056,44.137131],[-68.680773,44.279242]]],[[[-68.785601,44.053503],[-68.944597,44.11284],[-68.825067,44.186338],[-68.785601,44.053503]]],[[[-68.942826,44.281073],[-68.868444,44.38144],[-68.95189,44.218719],[-68.942826,44.281073]]],[[[-88.684434,48.115785],[-88.418244,48.18037],[-88.968903,47.901675],[-88.899698,47.902445],[-89.255202,47.876102],[-88.684434,48.115785]]],[[[-84.612845,45.834528],[-84.35602,45.771895],[-84.484128,45.73071],[-84.612845,45.834528]]],[[[-85.566441,45.760222],[-85.487026,45.621211],[-85.561634,45.572213],[-85.630016,45.598166],[-85.566441,45.760222]]],[[[-75.753765,35.199612],[-75.529393,35.288272],[-75.533512,35.773577],[-75.458659,35.596597],[-75.52592,35.233839],[-76.013145,35.061855],[-75.753765,35.199612]]],[[[-74.144428,40.53516],[-74.254588,40.502303],[-74.1894,40.642121],[-74.075884,40.648101],[-74.144428,40.53516]]],[[[-66.438813,18.485713],[-65.618229,18.386496],[-65.589947,18.228225],[-65.832429,18.014916],[-66.159742,17.928613],[-66.764491,18.006317],[-67.212101,17.956027],[-67.152665,18.203493],[-67.27135,18.362329],[-67.14283,18.505485],[-66.438813,18.485713]]],[[[-97.240849,26.411504],[-97.387459,26.820789],[-97.361796,27.359988],[-96.879424,28.131402],[-96.403206,28.371475],[-96.966996,27.950531],[-97.30447,27.407734],[-97.370731,26.909706],[-97.154271,26.066841],[-97.240849,26.411504]]],[[[-122.519535,48.288314],[-122.668385,48.223967],[-122.54512,48.05255],[-122.376259,48.034457],[-122.380497,47.904023],[-122.770045,48.224395],[-122.664659,48.401508],[-122.519535,48.288314]]],[[[-122.474684,47.511068],[-122.373628,47.388718],[-122.51885,47.33332],[-122.474684,47.511068]]],[[[-122.800217,48.60169],[-122.874135,48.418196],[-123.203026,48.596178],[-122.987296,48.561895],[-123.048652,48.621002],[-122.894599,48.71503],[-122.743049,48.661991],[-122.800217,48.60169]]],[[[-90.572383,46.958835],[-90.508157,46.956836],[-90.654796,46.919249],[-90.572383,46.958835]]],[[[-90.757147,47.03372],[-90.544875,47.017383],[-90.671581,46.948973],[-90.757147,47.03372]]],[[[-86.880572,45.331467],[-86.943041,45.41525],[-86.810055,45.422619],[-86.880572,45.331467]]]]},\"properties\":{\"name\":\"Alabama\",\"nation\":\"USA  \"}}]}","volume":"21","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb7c6e4b08c986b32748d","contributors":{"authors":[{"text":"Lins, H.F.","contributorId":81508,"corporation":false,"usgs":true,"family":"Lins","given":"H.F.","affiliations":[],"preferred":false,"id":369012,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014227,"text":"70014227 - 1987 - Basin-ring spacing on the Moon, Mercury, and Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:19:36","indexId":"70014227","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1429,"text":"Earth, Moon and Planets","active":true,"publicationSubtype":{"id":10}},"title":"Basin-ring spacing on the Moon, Mercury, and Mars","docAbstract":"Radial spacing between concentric rings of impact basins that lack central peaks is statistically similar and nonrandom on the Moon, Mercury, and Mars, both inside and outside the main ring. One spacing interval, (2.0 ?? 0.3)0.5D, or an integer multiple of it, dominates most basin rings. Three analytical approaches yield similar results from 296 remapped or newly mapped rings of 67 multi-ringed basins: least-squares of rank-grouped rings, least-squares of rank and ring diameter for each basin, and averaged ratios of adjacent rings. Analysis of 106 rings of 53 two-ring basins by the first and third methods yields an integer multiple (2 ??) of 2.00.5D. There are two exceptions: (1) Rings adjacent to the main ring of multi-ring basins are consistently spaced at a slightly, but significantly, larger interval, (2.1 ?? 0.3)0.5D; (2) The 88 rings of 44 protobasins (large peak-plus-inner-ring craters) are spaced at an entirely different interval (3.3 ?? 0.6)0.5D. The statistically constant and target-invariant spacing of so many rings suggests that this characteristic may constrain formational models of impact basins on the terrestrial planets. The key elements of such a constraint include: (1) ring positions may not have been located by the same process(es) that formed ring topography; (2) ring location and emplacement of ring topography need not be coeval; (3) ring location, but not necessarily the mode of ring emplacement, reflects one process that operated at the time of impact; and (4) the process yields similarly-disposed topographic features that are spatially discrete at 20.5D intervals, or some multiple, rather than continuous. These four elements suggest that some type of wave mechanism dominates the location, but not necessarily the formation, of basin rings. The waves may be standing, rather than travelling. The ring topography itself may be emplaced at impact by this and/or other mechanisms and may reflect additional, including post-impact, influences. ?? 1987 D. Reidel Publishing Company.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earth, Moon and Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers","doi":"10.1007/BF00054060","issn":"01679295","usgsCitation":"Pike, R., and Spudis, P.D., 1987, Basin-ring spacing on the Moon, Mercury, and Mars: Earth, Moon and Planets, v. 39, no. 2, p. 129-194, https://doi.org/10.1007/BF00054060.","startPage":"129","endPage":"194","numberOfPages":"66","costCenters":[],"links":[{"id":205683,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00054060"},{"id":226139,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059efefe4b0c8380cd4a516","contributors":{"authors":[{"text":"Pike, R.J.","contributorId":72814,"corporation":false,"usgs":true,"family":"Pike","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":367901,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Spudis, P. D.","contributorId":58719,"corporation":false,"usgs":true,"family":"Spudis","given":"P.","email":"","middleInitial":"D.","affiliations":[{"id":12445,"text":"Lunar and Planetary Institute","active":true,"usgs":false}],"preferred":false,"id":367900,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014229,"text":"70014229 - 1987 - Use of focal mechanisms to determine stress: A control study.","interactions":[],"lastModifiedDate":"2024-06-25T13:41:43.749612","indexId":"70014229","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Use of focal mechanisms to determine stress: A control study.","docAbstract":"<p><span>To allow focal mechanisms to be inverted for the stress field requires a different inversion algorithm than for slickenside data because focal mechanisms do not represent fault slip data unless one can decide which nodal plane is the fault plane. If one can decide which nodal plane is the fault plane, then the focal mechanisms can be inverted with the slickenside inversion algorithm. This decision cannot always be made, so algorithms for inverting focal mechanisms for the stress field are studied. These algorithms either use both of the possible fault planes or attempt to choose the correct fault plane while determining the stress tensor. Simulated focal mechanisms are made from slickenside data and used to provide a control study for the focal mechanism inversion algorithms. The results of this control study show that focal mechanisms can be inverted to find the best stress tensor, but the resolution is decreased unless the fault planes can be picked a priori. The resolution can also be increased by including constraints on the magnitude of the tangential traction on the fault plane. Therefore, using focal mechanisms to study small variations in the stress field requires that other data (e.g., studies of the hypocenters, surface faulting, or structural information concerning the region) be introduced to pick which of the nodal planes is the fault plane. This study also introduces the method of bootstrap resampling to the statistics of this problem. The non-Gaussian nature of the data makes the nonparametric formulation of the bootstrap approach ideal for this problem.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB092iB01p00357","issn":"01480227","usgsCitation":"Michael, A., 1987, Use of focal mechanisms to determine stress: A control study.: Journal of Geophysical Research Solid Earth, v. 92, no. B1, p. 357-368, https://doi.org/10.1029/JB092iB01p00357.","productDescription":"12 p.","startPage":"357","endPage":"368","numberOfPages":"12","costCenters":[],"links":[{"id":226141,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"92","issue":"B1","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505bbf10e4b08c986b329931","contributors":{"authors":[{"text":"Michael, A.J. 0000-0002-2403-5019","orcid":"https://orcid.org/0000-0002-2403-5019","contributorId":52192,"corporation":false,"usgs":true,"family":"Michael","given":"A.J.","affiliations":[],"preferred":false,"id":367904,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014230,"text":"70014230 - 1987 - Geological setting of U.S. fossil fuels.","interactions":[],"lastModifiedDate":"2013-01-17T20:35:39","indexId":"70014230","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1582,"text":"Episodes","active":true,"publicationSubtype":{"id":10}},"title":"Geological setting of U.S. fossil fuels.","docAbstract":"The USA has a special position in terms of fossil fuel development. Not only is it one of the most important nations in terms of resources of oil, gas and coal, but it has also been by far the dominant producer and consumer. In this thorough review of the regional geological environments in which fossil fuels formed in the USA, the authors point to a variety of models of resource occurrence of global interest.-Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Episodes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"07053797","usgsCitation":"Masters, C., and Mast, R., 1987, Geological setting of U.S. fossil fuels.: Episodes, v. 10, no. 4, p. 308-313.","startPage":"308","endPage":"313","numberOfPages":"6","costCenters":[],"links":[{"id":226142,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":265829,"type":{"id":11,"text":"Document"},"url":"https://www.episodes.co.in/www/backissues/104/ARTICLES--308.pdf"}],"volume":"10","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a227de4b0c8380cd570c2","contributors":{"authors":[{"text":"Masters, C.D.","contributorId":96664,"corporation":false,"usgs":true,"family":"Masters","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":367905,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mast, R. F.","contributorId":102887,"corporation":false,"usgs":true,"family":"Mast","given":"R. F.","affiliations":[],"preferred":false,"id":367906,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014264,"text":"70014264 - 1987 - Gravity anomaly at a Pleistocene lake bed in NW Alaska interpreted by analogy with Greenland's Lake Taserssauq and its floating ice tongue","interactions":[],"lastModifiedDate":"2024-06-24T16:51:53.366308","indexId":"70014264","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Gravity anomaly at a Pleistocene lake bed in NW Alaska interpreted by analogy with Greenland's Lake Taserssauq and its floating ice tongue","docAbstract":"<p><span>A possible example of a very deep glacial excavation is provided by a distinctive gravity low located at the front of a valley glacier that once flowed into glacial Lake Aniuk (formerly Lake Noatak) in the western Brooks Range. Geologic and geophysical data suggest that sediments or ice filling a glacially excavated valley are the most probable cause of the 30–50 mGal anomaly. Reasonable choices of geometric models and density contrasts indicate that the former excavation is now filled with a buried-ice thickness of 700 m or sediment thicknesses greater than 1 km; comparable anomalies are not known for other glaciated lacustrine valleys. However, many fiords do exceed 1 km in depth, and Crary found one nearly 2 km deep in Antarctica. In studying this fiord, he suggested the probable increased efficiency of excavation directly behind the point where an outlet glacier becomes afloat to form the Ross Ice Shelf and where it thus has a vertical component of motion and a mechanism for debris removal. Floating glacier ice tongues are now rare in the Arctic, but they exist in maritime parts of northern Ellesmere Island and Greenland. Studies of ice movement, environment, and morphology of another large floating glacier tongue in a perennially frozen lake in the Angiussaq Mountains of northern Greenland suggest that Pleistocene Lake Aniuk could have had a similar environment, water temperature, and near-stable water level and that it could have maintained both a floating polar glacier tongue and a perennial ice cover. No direct evidence of efficient excavation was observed in Greenland, but efficient glacial erosion behind a floating polar ice tongue could explain the excavation that caused the Alaskan gravity anomaly.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB092iB09p08976","issn":"01480227","usgsCitation":"Barnes, D., 1987, Gravity anomaly at a Pleistocene lake bed in NW Alaska interpreted by analogy with Greenland's Lake Taserssauq and its floating ice tongue: Journal of Geophysical Research Solid Earth, v. 92, no. B9, p. 8976-8984, https://doi.org/10.1029/JB092iB09p08976.","productDescription":"9 p.","startPage":"8976","endPage":"8984","numberOfPages":"9","costCenters":[],"links":[{"id":225630,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"92","issue":"B9","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a2a0ee4b0c8380cd5ae5f","contributors":{"authors":[{"text":"Barnes, D.F.","contributorId":48960,"corporation":false,"usgs":true,"family":"Barnes","given":"D.F.","email":"","affiliations":[],"preferred":false,"id":367981,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014273,"text":"70014273 - 1987 - Methylation patterns of aquatic humic substances determined by13C NMR spectroscopy","interactions":[],"lastModifiedDate":"2025-03-14T21:43:08.642224","indexId":"70014273","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2958,"text":"Organic Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Methylation patterns of aquatic humic substances determined by13C NMR spectroscopy","docAbstract":"<p><sup>13</sup><span>C NMR spectroscopy is used to examine the hydroxyl group functionality of a series of humic and fulvic acids from different aquatic environments. Samples first are methylated with</span><sup>13</sup><span>C-labeled diazomethane. The NMR spectra of the diazomethylated samples allow one to distinguish between methyl esters of carboxylic acids, methyl ethers of phenolic hydroxyls, and methyl ethers of phenolic hydroxyls adjacent to two substituents. Samples are then permethylated with</span><sup>13</sup><span>C-labeled methyl iodide/NaH.</span><sup>13</sup><span>C NMR spectra of permethylated samples show that a significant fraction of the hydroxyl groups is not methylated with diazomethane alone. In these spectra methyl ethers of carbohydrate and aliphatic hydroxyls overlap with methyl ethers of phenolic hydroxyls. Side reactions of the methyltion procedure including carbon methylation in the CH</span><sub>3</sub><span>I/NaH procedure, are also examined. Humic and fulvic acids from bog, swamp, groundwater, and lake waters shows some differences in their distribution of hydroxyl groups, mainly in the concentrations of phenolic hydroxyls, which may be attributed to their different biogeochemical origins.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0146-6380(87)90016-7","usgsCitation":"Thorn, K.A., Steelink, C., and Wershaw, R.L., 1987, Methylation patterns of aquatic humic substances determined by13C NMR spectroscopy: Organic Geochemistry, v. 11, no. 3, p. 123-137, https://doi.org/10.1016/0146-6380(87)90016-7.","productDescription":"15 p.","startPage":"123","endPage":"137","costCenters":[],"links":[{"id":225766,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a561ae4b0c8380cd6d357","contributors":{"authors":[{"text":"Thorn, Kevin A. 0000-0003-2236-5193 kathorn@usgs.gov","orcid":"https://orcid.org/0000-0003-2236-5193","contributorId":3288,"corporation":false,"usgs":true,"family":"Thorn","given":"Kevin","email":"kathorn@usgs.gov","middleInitial":"A.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":368000,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Steelink, C.","contributorId":55973,"corporation":false,"usgs":true,"family":"Steelink","given":"C.","email":"","affiliations":[],"preferred":false,"id":368001,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wershaw, Robert L. rwershaw@usgs.gov","contributorId":4856,"corporation":false,"usgs":true,"family":"Wershaw","given":"Robert","email":"rwershaw@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":368002,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}