Various methods of calculating and reporting the efficiency of food use in fish husbandry are examined. The effects of moisture content of feed and fish flesh, supplemental feeds augmented with natural feed items, differences in energy content due to feed formulations, and the usefulness of the various feed efficiency indices to aquaculturists and fish husbandry researchers are discussed.
","language":"English","publisher":"Oxford Academic","doi":"10.1577/1548-8640(1987)49%3C161:FCI%3E2.0.CO;2","usgsCitation":"Parker, N., 1987, Feed conversion indices: Controversy or convention?: Progressive Fish-Culturist, v. 49, no. 3, p. 161-166, https://doi.org/10.1577/1548-8640(1987)49%3C161:FCI%3E2.0.CO;2.","productDescription":"6 p.","startPage":"161","endPage":"166","numberOfPages":"6","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":132072,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"49","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fde4b07f02db5f5f1a","contributors":{"authors":[{"text":"Parker, N. C.","contributorId":101209,"corporation":false,"usgs":true,"family":"Parker","given":"N. C.","affiliations":[],"preferred":false,"id":319894,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70014231,"text":"70014231 - 1987 - Maestrichtian benthic foraminifers from Ocean Point, North Slope, Alaska ( USA).","interactions":[],"lastModifiedDate":"2013-03-24T12:08:42","indexId":"70014231","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":"Maestrichtian benthic foraminifers from Ocean Point, North Slope, Alaska ( USA).","docAbstract":"Previous studies of fauna and flora from Ocean Point, Alaska, have suggested ages ranging from Campanian to early Eocene and that these assemblages are either highly endemic or commonplace. I demonstrate that the moderately abundant benthic foraminifers constitute early Maestrichtian boreal assemblages common to Canada and northern Europe. Paleoenvironmental analysis indicates that deposition took place in outer neritic settings (50 to 150m). The Ocean Point benthic foraminiferal assemblages contain species that migrated from the US Gulf Coast, North American Interior and Europe during the Campanian, and from Europe during the Maestrichtian. These faunal affinities suggest that seaways connected the Arctic to the North American Interior and Atlantic during the Campanian and that a shallow seaway connected the Arctic to the Atlantic during the early Maestrichtian. - from Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Foraminiferal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsjfr.17.4.344","issn":"00961191","usgsCitation":"McDougall, K., 1987, Maestrichtian benthic foraminifers from Ocean Point, North Slope, Alaska ( USA).: Journal of Foraminiferal Research, v. 17, no. 4, p. 344-366, https://doi.org/10.2113/gsjfr.17.4.344.","startPage":"344","endPage":"366","numberOfPages":"23","costCenters":[],"links":[{"id":226207,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269894,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsjfr.17.4.344"}],"volume":"17","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4b27e4b0c8380cd6932a","contributors":{"authors":[{"text":"McDougall, K.","contributorId":106260,"corporation":false,"usgs":true,"family":"McDougall","given":"K.","email":"","affiliations":[],"preferred":false,"id":367907,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1001450,"text":"1001450 - 1987 - Feeding ecology of northern pintails and green-winged teal wintering in California","interactions":[],"lastModifiedDate":"2017-10-20T10:09:04","indexId":"1001450","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Feeding ecology of northern pintails and green-winged teal wintering in California","docAbstract":"The feeding ecology of northern pintails (Anas acuta) and green-winged teal (A. crecca) was examined from October through February 1979-81 in 4 major seasonal marsh types in the Central Valley, California. The esophagi of 262 pintails contained 72.3% plant seeds and 27.7% animal matter. The esophagi of 173 green-winged teal contained 62.3% plant seeds and 37.6% animal matter. Swamp timothy (Heleochloa schoenoides) caryopses, chironomid midge larvae, and common barnyardgrass (Echinochloa crusgalli) caryopses formed >50% of the diet of both species. Both species were highly opportunistic and generally shifted their food habits seasonally to the most available foods. Animal matter increased seasonally in the diets of both and formed about 60% of the foods eaten during January and February compared to only about 8% in October and 17% in December. Both species used open water marsh habitats almost exclusively in daytime but they used densely vegetated marshes almost exclusively at night. Management recommendations based on the food habits and habitat use patterns of pintails and green-winged teal are offered.","language":"English","publisher":"Wildlife Society","doi":"10.2307/3801733","usgsCitation":"Euliss, N.H., and Harris, S.W., 1987, Feeding ecology of northern pintails and green-winged teal wintering in California: Journal of Wildlife Management, v. 51, no. 4, p. 724-732, https://doi.org/10.2307/3801733.","productDescription":"9 p.","startPage":"724","endPage":"732","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":129130,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"51","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fde4b07f02db5f5dcf","contributors":{"authors":[{"text":"Euliss, Ned H. Jr. ceuliss@usgs.gov","contributorId":2916,"corporation":false,"usgs":true,"family":"Euliss","given":"Ned","suffix":"Jr.","email":"ceuliss@usgs.gov","middleInitial":"H.","affiliations":[],"preferred":false,"id":311050,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harris, Stanley W.","contributorId":174574,"corporation":false,"usgs":false,"family":"Harris","given":"Stanley","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":311051,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70184739,"text":"70184739 - 1987 - Cumulative impacts of oil fields on northern Alaskan landscapes","interactions":[],"lastModifiedDate":"2017-03-10T17:06:14","indexId":"70184739","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Cumulative impacts of oil fields on northern Alaskan landscapes","docAbstract":"Proposed further developments on Alaska's Arctic Coastal Plain raise questions about cumulative effects on arctic tundra ecosystems of development of multiple large oil fields. Maps of historical changes to the Prudhoe Bay Oil Field show indirect impacts can lag behind planned developments by many years and the total area eventually disturbed can greatly exceed the planned area of construction. For example, in the wettest parts of the oil field (flat thaw-lake plains), flooding and thermokarst covered more than twice the area directly affected by roads and other construction activities. Protecting critical wildlife habitat is the central issue for cumulative impact analysis in northern Alaska. Comprehensive landscape planning with the use of geographic information system technology and detailed geobotanical maps can help identify and protect areas of high wildlife use.
","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.238.4828.757","usgsCitation":"Walker, D., Webber, P., Binnian, E.F., Everett, K., Lederer, N., Nordstrand, E., and Walker, M., 1987, Cumulative impacts of oil fields on northern Alaskan landscapes: Science, v. 238, no. 4828, p. 757-761, https://doi.org/10.1126/science.238.4828.757.","productDescription":"5 p.","startPage":"757","endPage":"761","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":337404,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":337405,"rank":2,"type":{"id":22,"text":"Related Work"},"url":"https://pubs.usgs.gov/publication/70184724","text":"Letter in response to this article (Robertson 1989, Impacts of petroleum development in the Arctic)"}],"country":"United States","state":"Alaska","otherGeospatial":"Arctic National Wildlife Refuge","volume":"238","issue":"4828","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58c3c952e4b0f37a93ee9b8e","contributors":{"authors":[{"text":"Walker, D.A.","contributorId":82484,"corporation":false,"usgs":false,"family":"Walker","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":682807,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Webber, P.J.","contributorId":25351,"corporation":false,"usgs":false,"family":"Webber","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":682808,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Binnian, Emily F.","contributorId":34090,"corporation":false,"usgs":true,"family":"Binnian","given":"Emily","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":682809,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Everett, K.R.","contributorId":188454,"corporation":false,"usgs":false,"family":"Everett","given":"K.R.","email":"","affiliations":[],"preferred":false,"id":682810,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lederer, N.D.","contributorId":139151,"corporation":false,"usgs":false,"family":"Lederer","given":"N.D.","email":"","affiliations":[],"preferred":false,"id":682811,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Nordstrand, E.A.","contributorId":139152,"corporation":false,"usgs":false,"family":"Nordstrand","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":682812,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Walker, M.D.","contributorId":31937,"corporation":false,"usgs":true,"family":"Walker","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":682813,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70014274,"text":"70014274 - 1987 - Analysis of two-color geodimeter measurements of deformation within the Long Valley caldera: June 1983 to October 1985","interactions":[],"lastModifiedDate":"2024-06-24T18:02:52.257541","indexId":"70014274","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":"Analysis of two-color geodimeter measurements of deformation within the Long Valley caldera: June 1983 to October 1985","docAbstract":"Line length changes from several baselines in a trilateration network within the Long Valley caldera clearly define a decrease in strain rate from June 1983 through October 1985. The data consist of more than 1600 length measurements on 23 baselines using a two-color geodimeter, which has a precision of 0.2 ppm of the line length. Initial measurements made during the summer of 1983 show extension rates were as high as 6 ppm/yr on some baselines. The rates subsequently decreased steadily, to less than 1 ppm/yr during the summer of 1985. Ih contrast, the strain rates on a few other baselines were less than 0.2 ppm/yr averaged over the 2.3-year interval. A model is constructed using these observations as well as yearly observations of a trilateration network within and near the caldera. The model contains two points of inflation located at 5 and 10 km beneath the resurgent dome of the caldera plus dextral slip on a fault plane within the south moat within an elastic half-space. To mimic the observed time dependence in the two-color geodimeter data, we conclude that the rates of both slip and inflation have steadily decreased over the survey interval. Because the two-color geodimeter network is closer to all three sources than the single-color geodimeter network, these data are important for defining the factor of 2–3 rate decrease of slip and inflation. Comparing our estimates of slip and inflation with similar estimates for the year prior to July 1983, we conclude that the rate decrease is probably a result of postseismic and postinflation relaxation following the earthquake swarm in the south moat in January 1983.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB092iB09p09423","issn":"01480227","usgsCitation":"Langbein, J., Linker, M., and Tupper, D., 1987, Analysis of two-color geodimeter measurements of deformation within the Long Valley caldera: June 1983 to October 1985: Journal of Geophysical Research Solid Earth, v. 92, no. B9, p. 9423-9442, https://doi.org/10.1029/JB092iB09p09423.","productDescription":"20 p.","startPage":"9423","endPage":"9442","numberOfPages":"20","costCenters":[],"links":[{"id":225823,"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":"5059eb46e4b0c8380cd48d16","contributors":{"authors":[{"text":"Langbein, J.","contributorId":16990,"corporation":false,"usgs":true,"family":"Langbein","given":"J.","affiliations":[],"preferred":false,"id":368003,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Linker, M.","contributorId":23697,"corporation":false,"usgs":true,"family":"Linker","given":"M.","email":"","affiliations":[],"preferred":false,"id":368004,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tupper, D.","contributorId":30376,"corporation":false,"usgs":true,"family":"Tupper","given":"D.","email":"","affiliations":[],"preferred":false,"id":368005,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"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":"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.
","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":70014226,"text":"70014226 - 1987 - The importance of methane and thiosulfate in the metabolism of the bacterial symbionts of two deep-sea mussels","interactions":[],"lastModifiedDate":"2012-03-12T17:19:36","indexId":"70014226","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2660,"text":"Marine Biology","active":true,"publicationSubtype":{"id":10}},"title":"The importance of methane and thiosulfate in the metabolism of the bacterial symbionts of two deep-sea mussels","docAbstract":"Undescribed hydrocarbon-seep mussels were collected from the Louisiana Slope, Gulf of Mexico, during March 1986, and the ultrastructure of their gills was examined and compared to Bathymodiolus thermophilus, a mussel collected from the deep-sea hydrothermal vents on the Gala??pagos Rift in March 1985. These closely related mytilids both contain abundant symbiotic bacteria in their gills. However, the bacteria from the two species are distinctly different in both morphology and biochemistry, and are housed differently within the gills of the two mussels. The symbionts from the seep mussel are larger than the symbionts from B. thermophilus and, unlike the latter, contain stacked intracytoplasmic membranes. In the seep mussel three or fewer symbionts appear to be contained in each host-cell vacuole, while in B. thermophilus there are often more than twenty bacteria visible in a single section through a vacuole. The methanotrophic nature of the seep-mussel symbionts was confirmed in 14C-methane uptake experiments by the appearance of label in both CO2 and acid-stable, non-volatile, organic compounds after a 3 h incubation of isolated gill tissue. Furthermore, methane consumption was correlated with methanol dehydrogenase activity in isolated gill tissue. Activity of ribulose-1,5-biphosphate (RuBP) carboxylase and 14CO2 assimilation studies indicate the presence of either a second type of symbiont or contaminating bacteria on the gills of freshly captured seep mussels. A reevaluation of the nutrition of the symbionts in B. thermophilus indicates that while the major symbiont is not a methanotroph, its status as a sulfur-oxidizing chemoautotroph, as has been suggested previously, is far from proven. ?? 1987 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF00394838","issn":"00253162","usgsCitation":"Fisher, C., Childress, J., Oremland, R., and Bidigare, R., 1987, The importance of methane and thiosulfate in the metabolism of the bacterial symbionts of two deep-sea mussels: Marine Biology, v. 96, no. 1, p. 59-71, https://doi.org/10.1007/BF00394838.","startPage":"59","endPage":"71","numberOfPages":"13","costCenters":[],"links":[{"id":205680,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00394838"},{"id":226075,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bacfae4b08c986b3238bd","contributors":{"authors":[{"text":"Fisher, C.R.","contributorId":86120,"corporation":false,"usgs":true,"family":"Fisher","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":367898,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Childress, J.J.","contributorId":40350,"corporation":false,"usgs":true,"family":"Childress","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":367897,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oremland, R.S.","contributorId":97512,"corporation":false,"usgs":true,"family":"Oremland","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":367899,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bidigare, R.R.","contributorId":13757,"corporation":false,"usgs":true,"family":"Bidigare","given":"R.R.","email":"","affiliations":[],"preferred":false,"id":367896,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70014270,"text":"70014270 - 1987 - Probability theory versus simulation of petroleum potential in play analysis","interactions":[],"lastModifiedDate":"2012-03-12T17:19:29","indexId":"70014270","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":796,"text":"Annals of Operations Research","active":true,"publicationSubtype":{"id":10}},"title":"Probability theory versus simulation of petroleum potential in play analysis","docAbstract":"An analytic probabilistic methodology for resource appraisal of undiscovered oil and gas resources in play analysis is presented. This play-analysis methodology is a geostochastic system for petroleum resource appraisal in explored as well as frontier areas. An objective was to replace an existing Monte Carlo simulation method in order to increase the efficiency of the appraisal process. Underlying the two methods is a single geologic model which considers both the uncertainty of the presence of the assessed hydrocarbon and its amount if present. The results of the model are resource estimates of crude oil, nonassociated gas, dissolved gas, and gas for a geologic play in terms of probability distributions. The analytic method is based upon conditional probability theory and a closed form solution of all means and standard deviations, along with the probabilities of occurrence. ?? 1987 J.C. Baltzer A.G., Scientific Publishing Company.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Annals of Operations Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Baltzer Science Publishers","publisherLocation":"Baarn/Kluwer Academic Publishers","doi":"10.1007/BF02187102","issn":"02545330","usgsCitation":"Crovelli, R., 1987, Probability theory versus simulation of petroleum potential in play analysis: Annals of Operations Research, v. 8, no. 1, p. 363-381, https://doi.org/10.1007/BF02187102.","startPage":"363","endPage":"381","numberOfPages":"19","costCenters":[],"links":[{"id":205653,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02187102"},{"id":225763,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"8","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8cbbe4b0c8380cd7e869","contributors":{"authors":[{"text":"Crovelli, R. A.","contributorId":40969,"corporation":false,"usgs":true,"family":"Crovelli","given":"R. A.","affiliations":[],"preferred":false,"id":367996,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70014799,"text":"70014799 - 1987 - Crescentic dunes on the inner continental shelf off northern California","interactions":[],"lastModifiedDate":"2024-01-26T01:28:14.555708","indexId":"70014799","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Crescentic dunes on the inner continental shelf off northern California","docAbstract":"Large crescentic dunes that resemble barchans have been discovered within elongate scour depressions on the northern California inner continental shelf by using side-scan sonar. These dunes appear to be migrating obliquely to the regional shelf gradient; a preferred offshore direction of transport is indicated by the extended southern wings of many dunes. The isolated dunes and the scour depressions that contain them are located seaward of sea-floor outcrops off rocky capes and sea stacks. Repeated side-scan sonar records spanning four years (1981–1985) indicate that the dunes and bounding sidewalls of the scour depressions were somewhat modified, but the overall alteration to the bottom morphology during this period was only moderate to undetectable. The apparent low height of the dunes is consistent with a low migration speed. Over longer time periods (decades), the seaward transport of fine to medium sand in the crescentic dunes is probably an important way by which sand escapes the shallow part of the continental shelf in this region and mixes with the muddy deposits of the central shelf.
In many areas of the world, landslides dams are both interesting natural phenomena and significant hazards. A few of the these natural blockages attain heights that rival or exceed those of the largest manmade dams. A landslide dam in its natural state differs from a constructed embankment dam in that it is composed of a heterogeneous mass of poorly consolidated earth debris and has no channeled spillway or other protected outlet for its impoundment. Having no outlet, landslide dams upon overtopping very commonly fail by breaching due to erosion by the overflowing stream. Some of the world's largest and most devastating floods have occurred because of the failure of large landslide dams (Schuster and Costa, 1986).
This article discusses the recent occurrence of a large earthquake-induced landslide that dammed the Bairaman River in the interior of the island of New Britian, Papua New Guinea, and the subsequent overtopping and failure of this landslide dam.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"King, J.P., Loveday, I.C., and Schuster, R.L., 1987, Failure of a massive earthquake-induced landslide dam in Papua New Guinea: Earthquakes & Volcanoes (USGS), v. 19, no. 2, p. 40-47.","productDescription":"8 p.","startPage":"40","endPage":"47","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318092,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Papua New Guinea","otherGeospatial":"New Britain","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n 152.4462890625,\n -5.167540507950538\n ],\n [\n 152.55615234375,\n -4.116327411282937\n ],\n [\n 152.0068359375,\n -3.9519408561575817\n ],\n [\n 151.292724609375,\n -4.061535597066094\n ],\n [\n 151.424560546875,\n -4.8282597468669755\n ],\n [\n 150.941162109375,\n -4.751624041481169\n ],\n [\n 149.886474609375,\n -4.915832801313164\n ],\n [\n 148.271484375,\n -5.3425828520359735\n ],\n [\n 148.194580078125,\n -5.932972207945653\n ],\n [\n 150.35888671875,\n -6.533645130567532\n ],\n [\n 152.4462890625,\n -5.167540507950538\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"19","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56c45641e4b0946c65218519","contributors":{"authors":[{"text":"King, J. P.","contributorId":166971,"corporation":false,"usgs":false,"family":"King","given":"J.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":620615,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Loveday, I. C.","contributorId":166972,"corporation":false,"usgs":false,"family":"Loveday","given":"I.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":620616,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schuster, R. L.","contributorId":19135,"corporation":false,"usgs":true,"family":"Schuster","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":620617,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014191,"text":"70014191 - 1987 - New perspectives on the eruption of 1912 in the valley of ten thousand smokes, Katmai National Park, Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:19:29","indexId":"70014191","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1109,"text":"Bulletin of Volcanology","active":true,"publicationSubtype":{"id":10}},"title":"New perspectives on the eruption of 1912 in the valley of ten thousand smokes, Katmai National Park, Alaska","docAbstract":"New data extend our understanding of the 1912 eruption, its backfilled vent complex at Novarupta, and magma-storage systems beneath adjacent stratovolcanoes. Initial Plinian rhyolite fallout is confined to a narrow downwind sector, and its maximum thickness may occur as far as 13 km from source. In contrast, the partly contemporaneous rhyolite-rich ash flows underwent relatively low-energy emplacement, their generation evidently being decoupled from the high column. Flow veneers 1-13 m thick on near-vent ridge crests exhibit a general rhyolite-to-andesite sequence like that of the much thicker valley-confined ignimbrite into which they merge downslope. Lithics in both the initial Plinian and the ignimbrite are predominantly fragments of the Jurassic Naknek Formation, which extends from the surface to a depth of ca. 1500 m. Absence of lithics from the underlying sedimentary section limits to < 1.5 km the fragmentation level and the structural depth of the vent, which is thought to be funnel-shaped, flaring shallowly to a surface diameter of 2 km. Overlying the ignimbrite are layers of Plinian dacite fallout, > 100 m thick near source and 10 m thick 3 km away, which dip back into an inner vent <0.5 km wide, nested inside the earlier vent funnel of the ignimbrite. The dacite fallout is poor in Naknek lithics but contains abundant fragments of vitrophyre, most of which was vent-filling, densely welded tuff reejected during later phases of the 3-day eruption. Adjacent to the inner vent, a 225-m-high asymmetrical accumulation of coarse near-vent ejecta is stratigraphically continuous with the regional dacite fallout. Distensional faulting of its crest may reflect spreading related to compaction and welding. Nearby andesite-dacite stratovolcanoes, i.e., Martin, Mageik, Trident, and Katmai, display at least 12 vents that define a linear volcanic front trending N65??E. The 1912 vent and adjacent dacite domes are disposed parallel to the front and ca. 4 km behind it. Mount Griggs, 10 km behind the front, is more potassic than other centers, taps isotopically more depleted source materials, and reflects a wholly independent magmatic plumbing system. Geochemical differences among the stratovolcanoes, characteristically small eruptive volumes ( < 0.1 to 0.4 km3), and the dominance of andesite and low-SiO2 dacite suggest complex crustal reservoirs, not large integrated magma chambers. Linear fractures just outside the 1912 vent strike nearly normal to the volcanic front and may reflect dike transport of magma previously stored beneath Trident 3-5 km away. Caldera collapse at Mount Katmai may have taken place in response to hydraulic transfer of Katmai magma toward Novarupta via reservoir components beneath Trident. The voluminous 1912 eruption (12-15 km3 DRE) was also unusual in producing high-silica rhyolite (6-9 km3 DRE), a composition rare in this arc and on volcanic fronts in general. Isotopic data indicate that rhyolite genesis involved little assimilation of sedimentary rocks, pre-Tertiary plutonic rocks, or hydrothermally altered rocks of any age. Trace-element data suggest nonetheless that the rhyolite contains a nontrivial crustal contribution, most likely partial melts of Late Cenozoic arc-intrusive rocks. Because the three compositions (77%, 66-64.5%, and 61.5-58.5% SiO2) that intermingled in 1912 vented both concurrently and repeatedly (after eruptive pauses hours in duration), the compositional gaps between them must have been intrinsic to the reservoir, not merely effects of withdrawal dynamics. ?? 1987 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of Volcanology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01080359","issn":"02588900","usgsCitation":"Hildreth, W., 1987, New perspectives on the eruption of 1912 in the valley of ten thousand smokes, Katmai National Park, Alaska: Bulletin of Volcanology, v. 49, no. 5, p. 680-693, https://doi.org/10.1007/BF01080359.","startPage":"680","endPage":"693","numberOfPages":"14","costCenters":[],"links":[{"id":205639,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01080359"},{"id":225626,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"49","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a65fae4b0c8380cd72cc5","contributors":{"authors":[{"text":"Hildreth, W. 0000-0002-7925-4251","orcid":"https://orcid.org/0000-0002-7925-4251","contributorId":100487,"corporation":false,"usgs":true,"family":"Hildreth","given":"W.","affiliations":[],"preferred":false,"id":367819,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70014117,"text":"70014117 - 1987 - Sources and flux of natural gases from Mono Lake, California","interactions":[],"lastModifiedDate":"2020-01-18T10:57:56","indexId":"70014117","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":"Sources and flux of natural gases from Mono Lake, California","docAbstract":"The ability to identify a formation mechanism for natural gas in a particular environment requires consideration of several geochemical factors when there are multiple sources present. Four primary sources of methane have been identified in Mono Lake. Two of these sources were associated with numerous natural gas seeps which occur at various locations in the lake and extend beyond its present boundary; the two other gas sources result from current microbiological processes. In the natural gas seeps, we observed flow rates as high as 160 moles CH4 day−1, and estimate total lakewide annual seep flux to be 2.1 × 106 moles CH4. Geochemical parameters (δ13CH4,δDCH4,CH4/[C2H6+ C3H8]) andδ14CH4measurements revealed that most of the seeps originate from a paleo-biogenic (δ13CH4 = about −70%.). natural gas deposit of Pleistocene age which underlies the current and former lakebed. Gas seeps in the vicinity of hot springs had, in combination with the biogenic gas, a prominent thermogenic gas component resulting from hydrothermal alteration of buried organic matter.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(87)90367-X","issn":"00167037","usgsCitation":"Oremland, R.S., Miller, L., and Whiticar, M.J., 1987, Sources and flux of natural gases from Mono Lake, California: Geochimica et Cosmochimica Acta, v. 51, no. 11, p. 2915-2929, https://doi.org/10.1016/0016-7037(87)90367-X.","productDescription":"15 p.","startPage":"2915","endPage":"2929","numberOfPages":"15","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":225296,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California ","otherGeospatial":"Mono Lake","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -119.19891357421876,\n 37.91820111976663\n ],\n [\n -118.89129638671875,\n 37.91820111976663\n ],\n [\n -118.89129638671875,\n 38.10430528370985\n ],\n [\n -119.19891357421876,\n 38.10430528370985\n ],\n [\n -119.19891357421876,\n 37.91820111976663\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"51","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9352e4b08c986b31a427","contributors":{"authors":[{"text":"Oremland, Ronald S. 0000-0001-7382-0147 roremlan@usgs.gov","orcid":"https://orcid.org/0000-0001-7382-0147","contributorId":931,"corporation":false,"usgs":true,"family":"Oremland","given":"Ronald","email":"roremlan@usgs.gov","middleInitial":"S.","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":779739,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miller, L.G.","contributorId":32522,"corporation":false,"usgs":true,"family":"Miller","given":"L.G.","email":"","affiliations":[],"preferred":false,"id":367631,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Whiticar, Michael J.","contributorId":72124,"corporation":false,"usgs":true,"family":"Whiticar","given":"Michael","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":367632,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014185,"text":"70014185 - 1987 - Solid-state 13C NMR studies of dissolved organic matter in pore waters from different depositional environments","interactions":[],"lastModifiedDate":"2025-03-14T22:17:29.036504","indexId":"70014185","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":"Solid-state 13C NMR studies of dissolved organic matter in pore waters from different depositional environments","docAbstract":"Dissolved organic matter (DOM) in pore waters from sediments of a number of different depositional environments was isolated by ultrafiltration using membranes with a nominal molecular weight cutoff of 500. This > 500 molecular weight DOM represents 70–98% of the total DOM in these pore waters. We determined the gross chemical structure of this material using both solid-state 13C nuclear magnetic resonance spectroscopy and elemental analysis.
Our results show that the DOM in these pore waters appears to exist as two major types: one type dominated by carbohydrates and paraffinic structures and the second dominated by paraffinic and aromatic structures. We suggest that the dominance of one or the other structural type of DOM in the pore water depends on the relative oxidizing/reducing nature of the sediments as well as the source of the detrital organic matter. Under dominantly anaerobic conditions carbohydrates in the sediments are degraded by bacteria and accumulate in the pore water as DOM. However, little or no degradation of lignin occurs under these conditions. In contrast, sediments thought to be predominantly aerobic in character have DOM with diminished carbohydrate and enhanced aromatic character. The aromatic structures in the DOM from these sediments are thought to arise from the degradation of lignin. The large amounts of paraffinic structures in both types of DOM may be due to the degradation of unidentified paraffinic materials in algal or bacterial remains.
","language":"English","publisher":"Elsevier","doi":"10.1016/0146-6380(87)90029-5","usgsCitation":"Orem, W.H., and Hatcher, P.G., 1987, Solid-state 13C NMR studies of dissolved organic matter in pore waters from different depositional environments: Organic Geochemistry, v. 11, no. 2, p. 73-82, https://doi.org/10.1016/0146-6380(87)90029-5.","productDescription":"10 p.","startPage":"73","endPage":"82","costCenters":[],"links":[{"id":225558,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b923ce4b08c986b319d96","contributors":{"authors":[{"text":"Orem, William H. 0000-0003-4990-0539 borem@usgs.gov","orcid":"https://orcid.org/0000-0003-4990-0539","contributorId":577,"corporation":false,"usgs":true,"family":"Orem","given":"William","email":"borem@usgs.gov","middleInitial":"H.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":367806,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hatcher, Patrick G.","contributorId":93625,"corporation":false,"usgs":true,"family":"Hatcher","given":"Patrick","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":367807,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014192,"text":"70014192 - 1987 - The Upper Paleozoic pebbly mudstone facies of peninsular Thailand and western Malaysia - Continental margin deposits of Palaeoeurasia - Discussion","interactions":[],"lastModifiedDate":"2012-03-12T17:19:29","indexId":"70014192","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1795,"text":"Geologische Rundschau","active":true,"publicationSubtype":{"id":10}},"title":"The Upper Paleozoic pebbly mudstone facies of peninsular Thailand and western Malaysia - Continental margin deposits of Palaeoeurasia - Discussion","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geologische Rundschau","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01821074","issn":"00167835","usgsCitation":"Stauffer, P., and Peng, L., 1987, The Upper Paleozoic pebbly mudstone facies of peninsular Thailand and western Malaysia - Continental margin deposits of Palaeoeurasia - Discussion: Geologische Rundschau, v. 76, no. 3, p. 945-948, https://doi.org/10.1007/BF01821074.","startPage":"945","endPage":"948","numberOfPages":"4","costCenters":[],"links":[{"id":205646,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01821074"},{"id":225689,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"76","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba96ee4b08c986b322277","contributors":{"authors":[{"text":"Stauffer, P.H.","contributorId":53783,"corporation":false,"usgs":true,"family":"Stauffer","given":"P.H.","email":"","affiliations":[],"preferred":false,"id":367821,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peng, L.C.","contributorId":29699,"corporation":false,"usgs":true,"family":"Peng","given":"L.C.","email":"","affiliations":[],"preferred":false,"id":367820,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014189,"text":"70014189 - 1987 - Characteristics of hydrolysis of the complex Na2SnF6 in hydrothermal solutions-An experimental study","interactions":[],"lastModifiedDate":"2012-03-12T17:19:29","indexId":"70014189","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1233,"text":"Chinese Journal of Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Characteristics of hydrolysis of the complex Na2SnF6 in hydrothermal solutions-An experimental study","docAbstract":"Characteristics of hydrolysis of the complex Na2SnF6, which is used as the starting material, in hydrothermal solutions have been studied at 200-602??C and 1 kbar. Experimental results show that intense hydrolysis of Na2SnF6 occurs at high temperatures and that with the rise of temperature the hydrolysis will become more intense. Under the present experimental conditions the most possible existing form of Sn in the hydrothermal solutions is SnF3(OH) or Na2SnF3(OH). In addition, the hydrolysis constants for Na2SnF6 have also been calculated at 200-602??C, and the relationship between Na2SnF6 hydrolysis and temperature is discussed. ?? 1987 Science Press.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chinese Journal of Geochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Science in China Press","doi":"10.1007/BF02872266","issn":"0253486X","usgsCitation":"Wang, Y., and I-Ming, C., 1987, Characteristics of hydrolysis of the complex Na2SnF6 in hydrothermal solutions-An experimental study: Chinese Journal of Geochemistry, v. 6, no. 4, p. 372-382, https://doi.org/10.1007/BF02872266.","startPage":"372","endPage":"382","numberOfPages":"11","costCenters":[],"links":[{"id":205638,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02872266"},{"id":225624,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f49ae4b0c8380cd4bdf4","contributors":{"authors":[{"text":"Wang, Y.","contributorId":64213,"corporation":false,"usgs":true,"family":"Wang","given":"Y.","affiliations":[],"preferred":false,"id":367816,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"I-Ming, C.","contributorId":61177,"corporation":false,"usgs":true,"family":"I-Ming","given":"C.","affiliations":[],"preferred":false,"id":367815,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014179,"text":"70014179 - 1987 - A model of geomagnetic secular variation for 1980-1983","interactions":[],"lastModifiedDate":"2013-02-13T13:22:26","indexId":"70014179","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":"A model of geomagnetic secular variation for 1980-1983","docAbstract":"We developed an updated model of the secular variation of the main geomagnetic field during 1980 through 1983 based on annual mean values for that interval from 148 worldwide magnetic observatories. The model consists of a series of 80 spherical harmonics, up to and including those of degree and order 8. We used it to form a proposal for the 1985 revision of the International Geomagnetic Reference Field (IGRF). Comparison of the new model, whose mean epoch is approximately 1982.0, with the Provisional Geomagnetic Reference Field for 1975-1980 (PGRF 1975), indicates that the moment of the centered-dipole part of the geomagnetic field is now decreasing faster than it was 5 years ago. The rate (in field units) indicated by PGRF 1975 was about -25 nT a-1, while for the new model it is -28 nT a-1. ?? 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)90155-5","issn":"00319201","usgsCitation":"Peddie, N., and Zunde, A., 1987, A model of geomagnetic secular variation for 1980-1983: Physics of the Earth and Planetary Interiors, v. 48, no. 3-4, p. 324-329, https://doi.org/10.1016/0031-9201(87)90155-5.","startPage":"324","endPage":"329","numberOfPages":"6","costCenters":[],"links":[{"id":267331,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0031-9201(87)90155-5"},{"id":225428,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e47fe4b0c8380cd46681","contributors":{"authors":[{"text":"Peddie, N.W.","contributorId":75911,"corporation":false,"usgs":true,"family":"Peddie","given":"N.W.","affiliations":[],"preferred":false,"id":367790,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zunde, A.K.","contributorId":21946,"corporation":false,"usgs":true,"family":"Zunde","given":"A.K.","affiliations":[],"preferred":false,"id":367789,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014219,"text":"70014219 - 1987 - Some effects of quiet geomagnetic field changes upon values used for main field modeling","interactions":[],"lastModifiedDate":"2013-02-13T13:27:25","indexId":"70014219","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":"Some effects of quiet geomagnetic field changes upon values used for main field modeling","docAbstract":"The effects of three methods of data selection upon the assumed main field levels for geomagnetic observatory records used in main field modeling were investigated for a year of very low solar-terrestrial activity. The first method concerned the differences between the year's average of quiet day field values and the average of all values during the year. For H these differences were 2-3 gammas, for D they were -0.04 to -0.12???, for Z the differences were negligible. The second method of selection concerned the effects of the daytime internal Sq variations upon the daily mean values of field. The midnight field levels when the Sq currents were a minimum deviated from the daily mean levels by as much as 4-7 gammas in H and Z but were negligible for D. The third method of selection was designed to avoid the annual and semi-annual quiet level changes of field caused by the seasonal changes in the magnetosphere. Contributions from these changes were found to be as much as 4-7 gammas in quiet years and expected to be greater than 10 gammas in active years. Suggestions for improved methods of improved data selection in main field modeling are given. ?? 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)90144-0","issn":"00319201","usgsCitation":"Campbell, W., 1987, Some effects of quiet geomagnetic field changes upon values used for main field modeling: Physics of the Earth and Planetary Interiors, v. 48, no. 3-4, p. 193-199, https://doi.org/10.1016/0031-9201(87)90144-0.","startPage":"193","endPage":"199","numberOfPages":"7","costCenters":[],"links":[{"id":267335,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0031-9201(87)90144-0"},{"id":226007,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b929ae4b08c986b319fe6","contributors":{"authors":[{"text":"Campbell, W.H.","contributorId":30749,"corporation":false,"usgs":true,"family":"Campbell","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":367877,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":62630,"text":"gq1595 - 1987 - Geologic map of the Handies Peak quadrangle, San Juan, Hinsdale and Ouray Counties, Colorado","interactions":[{"subject":{"id":41387,"text":"ofr75431 - 1975 - Preliminary geologic map of the Handie's Peak quadrangle, Colorado","indexId":"ofr75431","publicationYear":"1975","noYear":false,"title":"Preliminary geologic map of the Handie's Peak quadrangle, Colorado"},"predicate":"SUPERSEDED_BY","object":{"id":62630,"text":"gq1595 - 1987 - Geologic map of the Handies Peak quadrangle, San Juan, Hinsdale and Ouray Counties, Colorado","indexId":"gq1595","publicationYear":"1987","noYear":false,"title":"Geologic map of the Handies Peak quadrangle, San Juan, Hinsdale and Ouray Counties, Colorado"},"id":1}],"lastModifiedDate":"2023-03-23T20:37:51.205436","indexId":"gq1595","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":316,"text":"Geologic Quadrangle","code":"GQ","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"1595","title":"Geologic map of the Handies Peak quadrangle, San Juan, Hinsdale and Ouray Counties, Colorado","docAbstract":"No abstract available.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/gq1595","usgsCitation":"Luedke, R.G., and Burbank, W.S., 1987, Geologic map of the Handies Peak quadrangle, San Juan, Hinsdale and Ouray Counties, Colorado: U.S. Geological Survey Geologic Quadrangle 1595, Report: 2 p.; 1 Plate: 36.83 x 34.03 inches, https://doi.org/10.3133/gq1595.","productDescription":"Report: 2 p.; 1 Plate: 36.83 x 34.03 inches","costCenters":[],"links":[{"id":248788,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/gq/1595/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":254181,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/gq/1595/report-thumb.jpg"},{"id":102671,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_1121.htm","linkFileType":{"id":5,"text":"html"},"description":"1121"}],"scale":"24000","country":"United States","state":"Colorado","county":"Hinsdale County, Ouray County, San Juan County","otherGeospatial":"Handies Peak quadrangle","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -107.625,\n 37.875\n ],\n [\n -107.625,\n 38\n ],\n [\n -107.5,\n 38\n ],\n [\n -107.5,\n 37.875\n ],\n [\n -107.625,\n 37.875\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b00e4b07f02db698117","contributors":{"authors":[{"text":"Luedke, Robert G.","contributorId":18339,"corporation":false,"usgs":true,"family":"Luedke","given":"Robert","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":267637,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burbank, Wilbur S.","contributorId":24758,"corporation":false,"usgs":true,"family":"Burbank","given":"Wilbur","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":267638,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70175726,"text":"70175726 - 1987 - Variable delay miniservo-control unit","interactions":[],"lastModifiedDate":"2016-08-18T14:51:13","indexId":"70175726","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5180,"text":"WRD Instrument News","active":true,"publicationSubtype":{"id":10}},"title":"Variable delay miniservo-control unit","docAbstract":"No abstract available.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Uhrich, M., 1987, Variable delay miniservo-control unit: WRD Instrument News.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"links":[{"id":326837,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57b6dc72e4b03fd6b7d94caf","contributors":{"authors":[{"text":"Uhrich, M.A.","contributorId":7325,"corporation":false,"usgs":true,"family":"Uhrich","given":"M.A.","affiliations":[],"preferred":false,"id":646207,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70179995,"text":"70179995 - 1987 - Developing a state water plan: Ground-water conditions in Utah, spring of 1987","interactions":[],"lastModifiedDate":"2022-12-14T14:09:59.521814","indexId":"70179995","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":110,"text":"Cooperative Investigations Report","active":true,"publicationSubtype":{"id":2}},"seriesNumber":"27","title":"Developing a state water plan: Ground-water conditions in Utah, spring of 1987","docAbstract":"This is the twenty-fourth in a Series of annual reports that describe ground-water Conditions in Utah. Reports in the series, prepared cooperatively by the U.S. Geological Survey and the Utah Division of Water Resources, provide data to enable interested parties to keep abreast of changing ground-water conditions.
This report, like the others in the series, contains information on well Construction, ground-water withdrawals from wells, Water-level changes, and related changes in precipitation and streamflow. Supplementary data such as graphs showing chemical quality of Water and maps showing water-level contours are included in reports of this series only for those years or areas for which applicable data are available and are important to a discussion of changing ground-water conditions.
The report includes individual discussions of Selected major areas of ground-water development in the State for the calendar year 1986. Water-level fluctuations, however, are described for spring 1986 to spring 1987. Much of the data used in the report were collected by the Geological Survey in cooperation with the Division of Water Rights, Utah Department of Natural Resources.
","language":"English","publisher":"Utah Department of Natural Resources, Division of Water Resources","publisherLocation":"Salt Lake City, UT","collaboration":"Prepared in cooperation with the State of Utah","usgsCitation":"Wilberg, D.E., Smith, G.J., Roark, D.M., Lambert, P.M., Jensen, V., Cordy, G.E., Burden, C.B., Enright, M., Emett, D.C., Thiros, S.A., Sandberg, G.W., Puchta, R.W., and Herbert, L.R., 1987, Developing a state water plan: Ground-water conditions in Utah, spring of 1987: Cooperative Investigations Report 27, vii, 80 p.","productDescription":"vii, 80 p.","numberOfPages":"88","costCenters":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"links":[{"id":333656,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":333655,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.waterrights.utah.gov/cgi-bin/libview.exe?Modinfo=Viewpub&LIBNUM=50-1-178"}],"country":"United States","state":"Utah","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-111.046551,41.251716],[-111.046723,40.997959],[-110.750727,40.996847],[-110.715026,40.996347],[-110.539819,40.996346],[-110.500718,40.994746],[-110.375714,40.994947],[-110.250709,40.996089],[-110.237848,40.995427],[-110.125709,40.99655],[-110.121639,40.997101],[-110.048476,40.997555],[-110.006495,40.997815],[-110.000708,40.997352],[-109.999838,40.99733],[-109.97553,40.997912],[-109.855299,40.997614],[-109.854302,40.997661],[-109.715409,40.998191],[-109.713877,40.998266],[-109.676421,40.998395],[-109.534926,40.998143],[-109.500694,40.999127],[-109.250735,41.001009],[-109.231985,41.002059],[-109.173682,41.000859],[-109.050076,41.000659],[-109.048455,40.826081],[-109.049088,40.714562],[-109.048373,40.662602],[-109.048249,40.653601],[-109.048044,40.619231],[-109.050074,40.540358],[-109.049955,40.539901],[-109.050698,40.499963],[-109.050314,40.495092],[-109.050946,40.444368],[-109.050969,40.222662],[-109.050973,40.180849],[-109.050944,40.180712],[-109.050813,40.059579],[-109.050873,40.058915],[-109.050615,39.87497],[-109.05104,39.660472],[-109.051363,39.497674],[-109.050765,39.366677],[-109.051512,39.126095],[-109.052436,38.999985],[-109.053292,38.942878],[-109.053233,38.942467],[-109.053797,38.905284],[-109.053943,38.904414],[-109.054189,38.874984],[-109.057388,38.795456],[-109.059541,38.719888],[-109.060253,38.599328],[-109.059962,38.499987],[-109.060062,38.275489],[-109.054648,38.244921],[-109.041762,38.16469],[-109.041837,38.153022],[-109.04282,37.999301],[-109.042819,37.997068],[-109.043121,37.97426],[-109.041058,37.907236],[-109.041653,37.88117],[-109.041844,37.872788],[-109.041723,37.842051],[-109.041754,37.835826],[-109.041461,37.800105],[-109.042098,37.74999],[-109.041636,37.74021],[-109.04176,37.713182],[-109.041732,37.711214],[-109.042269,37.666067],[-109.042089,37.623795],[-109.042131,37.617662],[-109.041806,37.604171],[-109.041865,37.530726],[-109.041915,37.530653],[-109.043137,37.499992],[-109.043464,37.484711],[-109.04581,37.374993],[-109.046039,37.249993],[-109.045584,37.249351],[-109.045487,37.210844],[-109.045978,37.201831],[-109.045995,37.177279],[-109.045156,37.112064],[-109.045203,37.111958],[-109.045173,37.109464],[-109.045189,37.096271],[-109.044995,37.086429],[-109.045058,37.074661],[-109.045166,37.072742],[-109.045223,36.999084],[-109.181196,36.999271],[-109.233848,36.999266],[-109.246917,36.999346],[-109.26339,36.999263],[-109.268213,36.999242],[-109.270097,36.999266],[-109.378039,36.999135],[-109.381226,36.999148],[-109.495338,36.999105],[-109.625668,36.998308],[-109.875673,36.998504],[-110.000677,36.997968],[-110.000876,36.998502],[-110.021778,36.998602],[-110.47019,36.997997],[-110.490908,37.003566],[-110.50069,37.00426],[-110.599512,37.003448],[-110.625605,37.003416],[-110.62569,37.003721],[-110.75069,37.003197],[-111.066496,37.002389],[-111.133718,37.000779],[-111.254853,37.001077],[-111.278286,37.000465],[-111.405517,37.001497],[-111.405869,37.001481],[-111.412784,37.001478],[-112.35769,37.001025],[-112.368946,37.001125],[-112.534545,37.000684],[-112.538593,37.000674],[-112.540368,37.000669],[-112.545094,37.000734],[-112.558974,37.000692],[-112.609787,37.000753],[-112.899366,37.000319],[-112.966471,37.000219],[-113.965907,36.999976],[-113.965907,37.000025],[-114.0506,37.000396],[-114.051749,37.088434],[-114.051822,37.090976],[-114.052827,37.103961],[-114.051867,37.134292],[-114.052179,37.14711],[-114.051673,37.172368],[-114.051405,37.233854],[-114.051974,37.283848],[-114.051974,37.284511],[-114.0518,37.293044],[-114.0518,37.293548],[-114.051927,37.370459],[-114.051927,37.370734],[-114.051765,37.418083],[-114.052448,37.43144],[-114.052701,37.492014],[-114.052685,37.502513],[-114.052718,37.517264],[-114.052689,37.517859],[-114.052962,37.592783],[-114.052472,37.604776],[-114.051728,37.745997],[-114.051785,37.746249],[-114.05167,37.746958],[-114.051109,37.756276],[-114.049919,37.765586],[-114.048473,37.809861],[-114.049677,37.823645],[-114.049928,37.852508],[-114.049658,37.881368],[-114.050423,37.999961],[-114.049903,38.148601],[-114.050138,38.24996],[-114.049417,38.2647],[-114.05012,38.404536],[-114.050091,38.404673],[-114.050485,38.499955],[-114.049834,38.543784],[-114.049862,38.547764],[-114.050154,38.57292],[-114.049883,38.677365],[-114.049749,38.72921],[-114.049168,38.749951],[-114.049465,38.874949],[-114.048521,38.876197],[-114.048054,38.878693],[-114.049104,39.005509],[-114.047079,39.499943],[-114.047728,39.542742],[-114.047273,39.759413],[-114.047783,39.79416],[-114.047214,39.821024],[-114.047134,39.906037],[-114.046555,39.996899],[-114.046835,40.030131],[-114.046386,40.097896],[-114.046741,40.104231],[-114.046683,40.116931],[-114.046153,40.231971],[-114.046178,40.398313],[-114.045826,40.424823],[-114.045218,40.430282],[-114.045518,40.494474],[-114.045577,40.495801],[-114.045281,40.506586],[-114.043505,40.726292],[-114.043831,40.758666],[-114.043803,40.759205],[-114.043176,40.771675],[-114.042145,40.999926],[-114.041447,41.207752],[-114.042553,41.210923],[-114.041396,41.219958],[-114.040231,41.49169],[-114.040942,41.499921],[-114.040437,41.615377],[-114.039968,41.62492],[-114.039901,41.753781],[-114.041152,41.850595],[-114.041107,41.850573],[-114.039648,41.884816],[-114.041723,41.99372],[-113.993903,41.992698],[-113.893261,41.988057],[-113.822163,41.988479],[-113.796082,41.989104],[-113.76453,41.989459],[-113.500837,41.992799],[-113.496548,41.993305],[-113.431563,41.993799],[-113.40223,41.994161],[-113.396497,41.99425],[-113.357611,41.993859],[-113.340072,41.994747],[-113.250829,41.99561],[-113.249159,41.996203],[-113.000821,41.998223],[-113.00082,41.998223],[-112.979218,41.998263],[-112.909587,41.998791],[-112.882367,41.998922],[-112.880619,41.998921],[-112.833125,41.999345],[-112.833084,41.999305],[-112.788542,41.999681],[-112.709375,42.000309],[-112.648019,42.000307],[-112.450814,42.000953],[-112.450567,42.001092],[-112.38617,42.001126],[-112.264936,42.000991],[-112.239107,42.001217],[-112.192976,42.001167],[-112.173352,41.996568],[-112.163956,41.996708],[-112.109532,41.997598],[-112.01218,41.99835],[-111.915837,41.998519],[-111.915622,41.998496],[-111.876491,41.998528],[-111.750778,41.99933],[-111.507264,41.999518],[-111.471381,41.999739],[-111.425535,42.00084],[-111.420898,42.000793],[-111.415873,42.000748],[-111.046689,42.001567],[-111.045818,41.579845],[-111.045789,41.565571],[-111.046264,41.377731],[-111.0466,41.360692],[-111.046551,41.251716]]]},\"properties\":{\"name\":\"Utah\",\"nation\":\"USA \"}}]}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5883303be4b0d00231637826","contributors":{"authors":[{"text":"Wilberg, Dale E.","contributorId":101275,"corporation":false,"usgs":true,"family":"Wilberg","given":"Dale","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":659602,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, G. J.","contributorId":80767,"corporation":false,"usgs":true,"family":"Smith","given":"G.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":659603,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Roark, D. Michael mroark@usgs.gov","contributorId":127806,"corporation":false,"usgs":true,"family":"Roark","given":"D.","email":"mroark@usgs.gov","middleInitial":"Michael","affiliations":[{"id":472,"text":"New Mexico Water Science Center","active":true,"usgs":true}],"preferred":true,"id":659604,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lambert, Patrick M. 0000-0001-6808-2303 plambert@usgs.gov","orcid":"https://orcid.org/0000-0001-6808-2303","contributorId":349,"corporation":false,"usgs":true,"family":"Lambert","given":"Patrick","email":"plambert@usgs.gov","middleInitial":"M.","affiliations":[{"id":38131,"text":"WMA - Office of Planning and Programming","active":true,"usgs":true}],"preferred":true,"id":659605,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jensen, V.L.","contributorId":99034,"corporation":false,"usgs":true,"family":"Jensen","given":"V.L.","email":"","affiliations":[],"preferred":false,"id":659606,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cordy, Gail E.","contributorId":94296,"corporation":false,"usgs":true,"family":"Cordy","given":"Gail","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":659607,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Burden, Carole B. cburden@usgs.gov","contributorId":852,"corporation":false,"usgs":true,"family":"Burden","given":"Carole","email":"cburden@usgs.gov","middleInitial":"B.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":659608,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Enright, Michael","contributorId":99979,"corporation":false,"usgs":true,"family":"Enright","given":"Michael","email":"","affiliations":[],"preferred":false,"id":659609,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Emett, D. C.","contributorId":21213,"corporation":false,"usgs":true,"family":"Emett","given":"D.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":659610,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Thiros, Susan A. 0000-0002-8544-553X sthiros@usgs.gov","orcid":"https://orcid.org/0000-0002-8544-553X","contributorId":965,"corporation":false,"usgs":true,"family":"Thiros","given":"Susan","email":"sthiros@usgs.gov","middleInitial":"A.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":659611,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Sandberg, G. W.","contributorId":55426,"corporation":false,"usgs":true,"family":"Sandberg","given":"G.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":659612,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Puchta, R. W","contributorId":177482,"corporation":false,"usgs":false,"family":"Puchta","given":"R.","email":"","middleInitial":"W","affiliations":[],"preferred":false,"id":659613,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Herbert, L. R.","contributorId":39865,"corporation":false,"usgs":true,"family":"Herbert","given":"L.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":659614,"contributorType":{"id":1,"text":"Authors"},"rank":13}]}} ,{"id":70015170,"text":"70015170 - 1987 - Recognition of Macluritella (Gastropoda) from the Upper Cambrian of Missouri and Nevada","interactions":[],"lastModifiedDate":"2024-06-20T11:57:49.261605","indexId":"70015170","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2412,"text":"Journal of Paleontology","active":true,"publicationSubtype":{"id":10}},"title":"Recognition of Macluritella (Gastropoda) from the Upper Cambrian of Missouri and Nevada","docAbstract":"Open-coiled euomphalacean gastropods have been identified for the first time in the Upper Cambrian Eminence Dolomite of Missouri. These gastropods have a triangular whorl profile and are conspecific with Hyolithes walcotti described from the Upper Cambrian of Nevada. That species is questionably reassigned to the gastropod genus Macluritella, hitherto known only from the Lower Ordovician of Colorado.