A pilot study was carried out on two relatively deep drill-cores (∼ 600 m) from the Götemar Granite massif in S.E. Sweden. This granite is typical of the 1400-Ma anorogenic granites of the northern hemisphere. Samples from representative, unfractured parts of the cores, together with four samples taken along a profile tangential to a fracture plane at ∼ 280-m depth, were investigated chemically, mineralogically and isotopically. The results show that after crystallisation, subtle and pervasive open-system modifications of the trace-element chemistry of the granite took place. Whereas the major-element chemistry and minera-logical data emphasised the relative homogeneity of the Götemar Granite samples investigated, trace elements such as U, Rb, and Pb revealed irregular distributions which are probably the result of large-scale hydrothermal alteration processes. This conclusion is supported by isotopic studies which indicate that whole-rock samples were open to a gain or loss of Pb and possibly U at ∼ 420 ± 171 Ma ago. In addition, isotopic data for U-Pb and U-Ra are consistent with a recent minor loss of U.
\nThe pervasive alteration and the more recent mobilisation of U are evident to a depth of at least 600 m. The effects are most prevalent along major fracture zones and within the upper 250–300 m of one drill-hole where a high frequency of crush zones has been noted. Higher Fe oxidation ratios, higher Rb contents, lower U contents and correspondingly higher Th/U ratios, all characterise this zone.
","language":"English","publisher":"Elsevier","doi":"10.1016/0009-2541(85)90087-7","issn":"00092541","usgsCitation":"Smellie, J.A., and Stuckless, J.S., 1985, Element mobility studies of two drill-cores from the Götemar Granite (Kråkemåla test site), southeast Sweden: Chemical Geology, v. 51, no. 1-2, p. 55-78, https://doi.org/10.1016/0009-2541(85)90087-7.","productDescription":"24 p.","startPage":"55","endPage":"78","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":220014,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266110,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0009-2541(85)90087-7"}],"volume":"51","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a08b7e4b0c8380cd51c39","contributors":{"authors":[{"text":"Smellie, John A.T.","contributorId":26437,"corporation":false,"usgs":true,"family":"Smellie","given":"John","email":"","middleInitial":"A.T.","affiliations":[],"preferred":false,"id":365320,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stuckless, John S. 0000-0002-7536-0444 jstuckless@usgs.gov","orcid":"https://orcid.org/0000-0002-7536-0444","contributorId":4974,"corporation":false,"usgs":true,"family":"Stuckless","given":"John","email":"jstuckless@usgs.gov","middleInitial":"S.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":365319,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":1001851,"text":"1001851 - 1985 - Improving waterfowl production estimates: Results of a test in the prairie pothole region","interactions":[],"lastModifiedDate":"2017-08-31T11:07:57","indexId":"1001851","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2019,"text":"International Congress of Game Biologists","active":true,"publicationSubtype":{"id":10}},"title":"Improving waterfowl production estimates: Results of a test in the prairie pothole region","docAbstract":"The U.S. Fish and Wildlife Service in an effort to improve and standardize methods for estimating waterfowl production tested a new technique in the four-county Arrowwood Wetland Management District (WMD) for three years (1982-1984). On 14 randomly selected 10.36 km2 plots, upland and wetland habitat was mapped, classified, and digitized. Waterfowl breeding pairs were counted twice each year and the proportion of wetland basins containing water was determined. Pair numbers and habitat conditions were entered into a computer model developed by Northern Prairie Wildlife Research Center. That model estimates production on small federally owned wildlife tracts, federal wetland easements, and private land. Results indicate that production estimates were most accurate for mallards (Anas platyrhynchos), the species for which the computer model and data base were originally designed. Predictions for the pintail (Anas acuta), gadwall (A. strepa), blue-winged teal (A. discors), and northern shoveler (A. clypeata) were believed to be less accurate. Modeling breeding period dynamics of a waterfowl species and making credible production estimates for a geographic area are possible if the data used in the model are adequate. The process of modeling the breeding period of a species aids in locating areas of insufficient biological knowledge. This process will help direct future research efforts and permit more efficient gathering of field data.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Congress of Game Biologists","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Arnold, P., and Cowardin, L., 1985, Improving waterfowl production estimates: Results of a test in the prairie pothole region: International Congress of Game Biologists, v. 17, p. 859-865.","productDescription":"7 p.","startPage":"859","endPage":"865","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":134425,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fce4b07f02db5f5a18","contributors":{"authors":[{"text":"Arnold, P.M.","contributorId":63750,"corporation":false,"usgs":true,"family":"Arnold","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":311934,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cowardin, L.M.","contributorId":106435,"corporation":false,"usgs":true,"family":"Cowardin","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":311935,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012978,"text":"70012978 - 1985 - Carboniferous U-Pb age of the Sebago batholith, southwestern Maine: Metamorphic and tectonic implications","interactions":[],"lastModifiedDate":"2023-12-28T21:57:08.001591","indexId":"70012978","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Carboniferous U-Pb age of the Sebago batholith, southwestern Maine: Metamorphic and tectonic implications","docAbstract":"Two phases (pink and white granite) of the Sebago batholith of southwestern Maine have been dated by the U-Pb zircon method. Identical upper concordia intercepts of both rocks indicate an intrusive age of 325 ± 3 m.y. for the batholith. The lower intercept of the pink-phase sample, 114 ± 13 m.y., is inferred to represent episodic lead loss due to the intrusion of the nearby Cretaceous Pleasant Mountain stock. The lower intercept of the white-phase sample, 18 ± 21 m.y., suggests only modern dilatancy lead loss. Monazites have ages of 272 m.y. (pink) and 282 m.y. (white) which are thought to be cooling ages. Rb-Sr whole-rock data have low initial 87Sr/86Sr ratios of 0.7031 (pink) and 0.7053 (white). These data, in conjunction with published 40Ar/39Ar, Rb-Sr, K-Ar, and fission-track ages, suggest that little or no uplift occurred in this part of New England until the Permian and that the uplift rate from 275 m.y. to 225 m.y. was ∼3 times as rapid as was the rate for 225 m.y. to the present. The Carboniferous age of the Sebago batholith suggests that currently accepted metamorphic and tectonic interpretations for southwestern Maine and for east-central New Hampshire require revision.
No abstract available.
","language":"English","publisher":"Texas Department of Water Resources","usgsCitation":"Carr, J.E., Meyer, W., Sandeen, W., and McLane, I.R., 1985, Digital models for simulation of ground-water hydrology of the Chicot and Evangeline aquifers along the Gulf Coast of Texas: Texas Department of Water Resources Report 289, 101 p.","productDescription":"101 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":326696,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57b58ac3e4b03bcb0104bb80","contributors":{"authors":[{"text":"Carr, J. E.","contributorId":49373,"corporation":false,"usgs":true,"family":"Carr","given":"J.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":645829,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meyer, W.R.","contributorId":81141,"corporation":false,"usgs":true,"family":"Meyer","given":"W.R.","email":"","affiliations":[],"preferred":false,"id":645830,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sandeen, W.M.","contributorId":102488,"corporation":false,"usgs":true,"family":"Sandeen","given":"W.M.","affiliations":[],"preferred":false,"id":645831,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"McLane, I. R.","contributorId":173782,"corporation":false,"usgs":false,"family":"McLane","given":"I.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":645832,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70013907,"text":"70013907 - 1985 - Prediction of central California earthquakes from soil-gas helium fluctuations","interactions":[],"lastModifiedDate":"2012-03-12T17:19:32","indexId":"70013907","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3209,"text":"Pure and Applied Geophysics PAGEOPH","active":true,"publicationSubtype":{"id":10}},"title":"Prediction of central California earthquakes from soil-gas helium fluctuations","docAbstract":"The observations of short-term decreases in helium soil-gas concentrations along the San Andreas Fault in central California have been correlated with subsequent earthquake activity. The area of study is elliptical in shape with radii approximately 160??80 km, centered near San Benito, and with the major axis parallel to the Fault. For 83 percent of the M>4 earthquakes in this area a helium decrease preceded seismic activity by 1.5 to 6.5 weeks. There were several earthquakes without a decrease and several decreases without a corresponding earthquake. Owing to complex and unresolved interaction of many geophysical and geochemical parameters, no suitable model is yet developed to explain the observations. ?? 1985 Birkha??user Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics PAGEOPH","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Birkha??user-Verlag","doi":"10.1007/BF00874605","issn":"00334553","usgsCitation":"Reimer, G., 1985, Prediction of central California earthquakes from soil-gas helium fluctuations: Pure and Applied Geophysics PAGEOPH, v. 122, no. 2-4, p. 369-375, https://doi.org/10.1007/BF00874605.","startPage":"369","endPage":"375","numberOfPages":"7","costCenters":[],"links":[{"id":205682,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00874605"},{"id":226116,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"122","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81ebe4b0c8380cd7b7d4","contributors":{"authors":[{"text":"Reimer, G.M.","contributorId":59800,"corporation":false,"usgs":true,"family":"Reimer","given":"G.M.","affiliations":[],"preferred":false,"id":367141,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013280,"text":"70013280 - 1985 - An assessment of the near-surface accuracy of the international geomagnetic reference field 1980 model of the main geomagnetic field","interactions":[],"lastModifiedDate":"2013-02-13T13:32:59","indexId":"70013280","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"An assessment of the near-surface accuracy of the international geomagnetic reference field 1980 model of the main geomagnetic field","docAbstract":"The new International Geomagnetic Reference Field (IGRF) model of the main geomagnetic field for 1980 is based heavily on measurements from the MAGSAT satellite survey. Assessment of the accuracy of the new model, as a description of the main field near the Earth's surface, is important because the accuracy of models derived from satellite data can be adversely affected by the magnetic field of electric currents in the ionosphere and the auroral zones. Until now, statements about its accuracy have been based on the 6 published assessments of the 2 proposed models from which it was derived. However, those assessments were either regional in scope or were based mainly on preliminary or extrapolated data. Here we assess the near-surface accuracy of the new model by comparing it with values for 1980 derived from annual means from 69 magnetic observatories, and by comparing it with WC80, a model derived from near-surface data. The comparison with observatory-derived data shows that the new model describes the field at the 69 observatories about as accurately as would a model derived solely from near-surface data. The comparison with WC80 shows that the 2 models agree closely in their description of D and I near the surface. These comparisons support the proposition that the new IGRF 1980 main-field model is a generally accurate description of the main field near the Earth's surface in 1980. ?? 1985.","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(85)90056-1","issn":"00319201","usgsCitation":"Peddie, N., and Zunde, A., 1985, An assessment of the near-surface accuracy of the international geomagnetic reference field 1980 model of the main geomagnetic field: Physics of the Earth and Planetary Interiors, v. 37, no. 1, p. 1-4, https://doi.org/10.1016/0031-9201(85)90056-1.","startPage":"1","endPage":"4","numberOfPages":"4","costCenters":[],"links":[{"id":267339,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0031-9201(85)90056-1"},{"id":219972,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ea1ae4b0c8380cd4862b","contributors":{"authors":[{"text":"Peddie, N.W.","contributorId":75911,"corporation":false,"usgs":true,"family":"Peddie","given":"N.W.","affiliations":[],"preferred":false,"id":365713,"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":365712,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013534,"text":"70013534 - 1985 - Scientific knowledge and modern prospecting","interactions":[],"lastModifiedDate":"2019-06-11T12:34:18","indexId":"70013534","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2746,"text":"Mineralium Deposita","active":true,"publicationSubtype":{"id":10}},"title":"Scientific knowledge and modern prospecting","docAbstract":"Modern prospecting is the systematic search for specified and generally ill-exposed components of the Earth's crust known as ore. This prospecting depends entirely on reliable, or scientific knowledge for guidance and for recognition of the search objects. Improvement in prospecting results from additions and refinements to scientific knowledge. Scientific knowledge is an ordered distillation of observations too numerous and too complex in themselves for easy understanding and for effective management. The ordering of these observations is accomplished by an evolutionary hierarchy of abstractions. These abstractions employ simplified descriptions consisting of characterization by selected properties, sampling to represent much larger parts of a phenomenon, generalized mappings of patterns of geometrical and numerical relations among properties, and explanation (theory) of these patterns as functional relations among the selected properties. Each abstraction is predicated on the mode of abstraction anticipated for the next higher level, so that research is a deductive process in which the highest level, theory, is indispensable for the growth and refinement of scientific knowledge, and therefore of prospecting methodology.
","language":"English","publisher":"Springer-Verlag","doi":"10.1007/BF00204257","issn":"00264598","usgsCitation":"Neuerburg, G.J., 1985, Scientific knowledge and modern prospecting: Mineralium Deposita, v. 20, no. 1, p. 30-32, https://doi.org/10.1007/BF00204257.","productDescription":"3 p.","startPage":"30","endPage":"32","numberOfPages":"3","costCenters":[],"links":[{"id":219923,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8786e4b08c986b316522","contributors":{"authors":[{"text":"Neuerburg, G. J.","contributorId":29395,"corporation":false,"usgs":true,"family":"Neuerburg","given":"G.","middleInitial":"J.","affiliations":[],"preferred":false,"id":366288,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013135,"text":"70013135 - 1985 - Apertural features and surface texture of upper Paleogene biserial planktonic foraminifers: links between Chiloguembelina and Streptochilus.","interactions":[],"lastModifiedDate":"2013-03-24T12:11:51","indexId":"70013135","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Apertural features and surface texture of upper Paleogene biserial planktonic foraminifers: links between Chiloguembelina and Streptochilus.","docAbstract":"Several upper Paleogene species of Chiloguembelina have an internal apertural plate that is very similar to the internal plate typical of the Neogene genus Streptochilus. The type species of Chiloguembelina, C. midwayensis midwayensis (Cushman), however, lacks any internal apertural structure or modifications. Therefore, the following 'Chiloguembelina', which have an internal plate, are assigned to Streptochilus: S. cubensis (Palmer), S. martini (Pijpers) and S. sp.aff. S. martini. -Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Foraminiferal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsjfr.15.1.1","issn":"00961191","usgsCitation":"Poore, R., and Gosnell, L., 1985, Apertural features and surface texture of upper Paleogene biserial planktonic foraminifers: links between Chiloguembelina and Streptochilus.: Journal of Foraminiferal Research, v. 15, no. 1, p. 1-5, https://doi.org/10.2113/gsjfr.15.1.1.","startPage":"1","endPage":"5","numberOfPages":"5","costCenters":[],"links":[{"id":220406,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269897,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsjfr.15.1.1"}],"volume":"15","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec71e4b0c8380cd49290","contributors":{"authors":[{"text":"Poore, R.Z.","contributorId":35314,"corporation":false,"usgs":true,"family":"Poore","given":"R.Z.","email":"","affiliations":[],"preferred":false,"id":365371,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gosnell, L.B.","contributorId":78086,"corporation":false,"usgs":true,"family":"Gosnell","given":"L.B.","affiliations":[],"preferred":false,"id":365372,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013325,"text":"70013325 - 1985 - MONITORING THE EARTH - TOO MANY PLAYERS?","interactions":[],"lastModifiedDate":"2012-03-12T17:18:31","indexId":"70013325","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"MONITORING THE EARTH - TOO MANY PLAYERS?","docAbstract":"Remote sensing from satellites provides a unique tool to measure the parameters of the Earth on a worldwide scale. A number of organizations are currently engaged in, or proposing to embark on, worldwide measurement/monitoring programs. Program objectives vary in type and complexity, including a form of technical library and an ambitious experiment to validate algorithms to derive land surface climatological parameters. Modeling and understanding the Earth as an integrated system is an immense undertaking and will require at least as many measurements as currently acquired. Development of a long-term program of Earth system monitoring/modeling, such as the International Global Change Program proposed by the International Council of Scientific Unions, could provide the necessary focus and structure for effective international coordination and cooperation.","largerWorkTitle":"Technical Papers of the American Society of Photogrammetry, Annual Meeting","conferenceTitle":"Technical Papers, 51st Annual Meeting, 1985 ASP-ACSM Convention: Theodolite to Satellite.","conferenceLocation":"Washington, DC, USA","language":"English","publisher":"American Soc of Photogrammetry","publisherLocation":"Falls Church, VA, USA","isbn":"0937294640","usgsCitation":"Thorley, G.A., 1985, MONITORING THE EARTH - TOO MANY PLAYERS?, in Technical Papers of the American Society of Photogrammetry, Annual Meeting, v. 2, Washington, DC, USA.","startPage":"766","costCenters":[],"links":[{"id":220582,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4aeae4b0c8380cd6914a","contributors":{"authors":[{"text":"Thorley, Gene A.","contributorId":55957,"corporation":false,"usgs":true,"family":"Thorley","given":"Gene","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":365818,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":28861,"text":"wri854055 - 1985 - Investigation of selected streamflow characteristics of the Alabama River upstream from Selma, Alabama","interactions":[],"lastModifiedDate":"2022-06-06T17:50:01.378241","indexId":"wri854055","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"85-4055","title":"Investigation of selected streamflow characteristics of the Alabama River upstream from Selma, Alabama","docAbstract":"Available data for floods in the vicinity of Montgomery since the late 1800 's indicate that the flood of 1886 is the highest since settlement of the area in 1814. Profiles for floods in 1948, 1961, 1976, and 1979 were defined using floodmarks and recorded peak stages at gaging stations at Selma and Montgomery. The floods in 1948 and 1961 occurred before construction of Robert F. Henry Lock and Dam (formerly Jones Bluff Lock and Dam and Millers Ferry Lock and Dam). Considerable water-surface differences are indicated between the profiles for periods before and after construction of the dams. The investigation included a step-backwater model to reproduce profiles based on the actual flood profiles. After the actual flood profiles were reproduced, the model was used to compute additional profiles showing the effects of varying tributary inflow. The profiles were computed for discharges ranging from 80,000 ft3/s to 500 ,000 ft3/s. Stage-discharge relations were then developed for five sites upstream from Selma. Discharge coefficient curves for prevalent types of flow over the spillway at Robert F. Henry Lock and Dam were developed using discharges obtained from current-meter measurements and standard discharge equations for flow through gate-controlled spillways. (USGS)","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wri854055","collaboration":"Prepared in cooperation with the U.S. Army Corps of Engineers, Mobile District","usgsCitation":"Nelson, G.H., Ming, C.O., and Psinakis, W.L., 1985, Investigation of selected streamflow characteristics of the Alabama River upstream from Selma, Alabama: U.S. Geological Survey Water-Resources Investigations Report 85-4055, vi, 44 p., https://doi.org/10.3133/wri854055.","productDescription":"vi, 44 p.","costCenters":[],"links":[{"id":401757,"rank":6,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1985/4055/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":57740,"rank":403,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/1985/4055/plate-4.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":57739,"rank":402,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/1985/4055/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":57737,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/1985/4055/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":159334,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1985/4055/report-thumb.jpg"},{"id":57738,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/1985/4055/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Alabama","city":"Selma","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -87.154541015625,\n 32.22906629627297\n ],\n [\n -86.22894287109375,\n 32.22906629627297\n ],\n [\n -86.22894287109375,\n 32.51207789841144\n ],\n [\n -87.154541015625,\n 32.51207789841144\n ],\n [\n -87.154541015625,\n 32.22906629627297\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4783e4b07f02db483979","contributors":{"authors":[{"text":"Nelson, G. H. Jr.","contributorId":23562,"corporation":false,"usgs":true,"family":"Nelson","given":"G.","suffix":"Jr.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":200521,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ming, C. O.","contributorId":9266,"corporation":false,"usgs":true,"family":"Ming","given":"C.","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":200520,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Psinakis, W. L.","contributorId":104074,"corporation":false,"usgs":true,"family":"Psinakis","given":"W.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":200522,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70013087,"text":"70013087 - 1985 - Anomalous 13C enrichment in modern marine organic carbon","interactions":[],"lastModifiedDate":"2012-03-12T17:18:35","indexId":"70013087","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Anomalous 13C enrichment in modern marine organic carbon","docAbstract":"Marine organic carbon is heavier isotopically (13C enriched) than most land-plant or terrestrial organic C1. Accordingly, ??13C values of organic C in modern marine sediments are routinely interpreted in terms of the relative proportions of marine and terrestrial sources of the preserved organic matter2,3. When independent geochemical techniques are used to evaluate the source of organic matter in Cretaceous or older rocks, those rocks containing mostly marine organic C are found typically to have lighter (more-negative) ??13C values than rocks containing mostly terrestrial organic C. Here we conclude that marine photosynthesis in mid-Cretaceous and earlier oceans generally resulted in a greater fractionation of C isotopes and produced organic C having lighter ??13C values. Modern marine photosynthesis may be occurring under unusual geological conditions (higher oceanic primary production rates, lower PCO2) that limit dissolved CO2 availability and minimize carbon isotope fractionation4. ?? 1985 Nature Publishing Group.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1038/315216a0","issn":"00280836","usgsCitation":"Arthur, M., Dean, W., and Claypool, G., 1985, Anomalous 13C enrichment in modern marine organic carbon: Nature, v. 315, no. 6016, p. 216-218, https://doi.org/10.1038/315216a0.","startPage":"216","endPage":"218","numberOfPages":"3","costCenters":[],"links":[{"id":205053,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/315216a0"},{"id":220673,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"315","issue":"6016","noUsgsAuthors":false,"publicationDate":"1985-05-01","publicationStatus":"PW","scienceBaseUri":"5059ec45e4b0c8380cd49166","contributors":{"authors":[{"text":"Arthur, M.A.","contributorId":24791,"corporation":false,"usgs":true,"family":"Arthur","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":365254,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dean, W.E.","contributorId":97099,"corporation":false,"usgs":true,"family":"Dean","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":365255,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Claypool, George E.","contributorId":8475,"corporation":false,"usgs":true,"family":"Claypool","given":"George E.","affiliations":[],"preferred":false,"id":365253,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70012177,"text":"70012177 - 1985 - THEORETICAL TECHNIQUE FOR DETERMINING THE CUMULATIVE IMPACT OF IRON AND MANGANESE OXIDATION IN STREAMS RECEIVING COAL-MINE DISCHARGE.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:05","indexId":"70012177","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"THEORETICAL TECHNIQUE FOR DETERMINING THE CUMULATIVE IMPACT OF IRON AND MANGANESE OXIDATION IN STREAMS RECEIVING COAL-MINE DISCHARGE.","docAbstract":"Two U. S. Geological Survey computer programs are modified and linked to predict the cumulative impact of iron and manganese oxidation in coal-mine discharge on the dissolved-chemical quality of a receiving stream. The coupled programs calculate the changes in dissolved-iron, dissolved-manganese, and dissolved-oxygen concentrations, and the pH of surface water downstream from the discharge. The cumulative impact of representative discharges from several coal mines on stream quality in a small watershed in southwestern Indiana was simulated to determine the effectiveness and sensitivity of the coupled programs.","largerWorkTitle":"University of Kentucky, Office of Engineering Services, (Bulletin) UKY BU","conferenceTitle":"Proceedings - 1985 Symposium on Surface Mining, Hydrology, Sedimentology, and Reclamation.","conferenceLocation":"Lexington, KY, USA","language":"English","publisher":"Univ of Kentucky","publisherLocation":"Office of Engineering Services, Lexington, KY, USA","issn":"02706504","isbn":"0897790642","usgsCitation":"Bobay, K.E., and Banaszak, K.J., 1985, THEORETICAL TECHNIQUE FOR DETERMINING THE CUMULATIVE IMPACT OF IRON AND MANGANESE OXIDATION IN STREAMS RECEIVING COAL-MINE DISCHARGE., in University of Kentucky, Office of Engineering Services, (Bulletin) UKY BU, Lexington, KY, USA, p. 105-114.","startPage":"105","endPage":"114","numberOfPages":"10","costCenters":[],"links":[{"id":221932,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba386e4b08c986b31fd38","contributors":{"editors":[{"text":"Graves Donald H.","contributorId":128374,"corporation":true,"usgs":false,"organization":"Graves Donald H.","id":536244,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Bobay, Keith E.","contributorId":66733,"corporation":false,"usgs":true,"family":"Bobay","given":"Keith","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":362929,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Banaszak, Konrad J.","contributorId":88880,"corporation":false,"usgs":true,"family":"Banaszak","given":"Konrad","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":362930,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012375,"text":"70012375 - 1985 - Element mobility during alteration of silicic ash to kaolinite - A study of tonstein","interactions":[],"lastModifiedDate":"2025-07-25T16:47:35.142486","indexId":"70012375","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3369,"text":"Sedimentology","active":true,"publicationSubtype":{"id":10}},"title":"Element mobility during alteration of silicic ash to kaolinite - A study of tonstein","docAbstract":"A laterally persistent kaolinitic mudstone parting (tonstein) occurring in a Wyoming coal bed of Eocene age was sampled to estimate the compositional contrast with a probable silicic ash precursor, and to determine the compositional influence of leached ash on immediately adjacent coal. With the exception of Al, and possibly Ti, the tonstein is highly to moderately leached of major elements, relative to a range of compositions estimated for silicic ash of the region. In agreement with the behaviour of geochemically similar major elements, alkali trace elements (Rb, Cs) are highly leached, transition-series metals moderately leached, and Ga is residual. Additional immobile trace elements are Zr and Hf but some other trace elements that are considered relatively immobile during low-temperature alteration (Th, Ta, Nb, REE, Y) were apparently leached by the low-Eh, low-pH, organic-rich pore fluids of the coal-forming swamp.
The migrational range of many of the leached elements is highly limited by the intimate association of tonstein with enclosing organic matter. Mixtures of coal + minor tonstein that occur within 20 mm of contacts are consistently enriched in some elements relative to either tonstein or nearby coal (U, Cu), or relative to calculated mixtures of tonstein and coal in their measured proportions (Th, Y, REE, Pb, Ba, V, Ti). Direct observations by fission-track radiography and electron microprobe indicate a preference of U and Fe for the organic component of mixtures. Metal fixation is probably by adsorption on insoluble organic matter (humic acids), or by precipitation as minor sulphides in these low-sulphur coals.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1365-3091.1985.tb00471.x","issn":"00370746","usgsCitation":"Zielinski, R.A., 1985, Element mobility during alteration of silicic ash to kaolinite - A study of tonstein: Sedimentology, v. 32, no. 4, p. 567-579, https://doi.org/10.1111/j.1365-3091.1985.tb00471.x.","productDescription":"13 p.","startPage":"567","endPage":"579","costCenters":[],"links":[{"id":222253,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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\"}}]}","volume":"32","issue":"4","noUsgsAuthors":false,"publicationDate":"2006-06-14","publicationStatus":"PW","scienceBaseUri":"505a08b7e4b0c8380cd51c36","contributors":{"authors":[{"text":"Zielinski, R. A. 0000-0002-4047-5129","orcid":"https://orcid.org/0000-0002-4047-5129","contributorId":106930,"corporation":false,"usgs":true,"family":"Zielinski","given":"R.","email":"","middleInitial":"A.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":363405,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70012740,"text":"70012740 - 1985 - Time scales and mechanisms of estuarine variability, a synthesis from studies of San Francisco Bay","interactions":[],"lastModifiedDate":"2018-09-13T15:39:50","indexId":"70012740","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Time scales and mechanisms of estuarine variability, a synthesis from studies of San Francisco Bay","docAbstract":"This review of the preceding papers suggests that temporal variability in San Francisco Bay can be characterized by four time scales (hours, days-weeks, months, years) and associated with at least four mechanisms (variations in freshwater inflow, tides, wind, and exchange with coastal waters). The best understood component of temporal variability is the annual cycle, which is most obviously influenced by seasonal variations in freshwater inflow. The winter season of high river discharge is characterized by: large-scale redistribution of the salinity field (e.g. the upper estuary becomes a riverine system); enhanced density stratification and gravitational circulation with shortened residence times in the bay; decreased tissue concentrations of some contaminants (e.g. copper) in resident bivalves; increased estuarine inputs of river-borne materials such as dissolved inorganic nutrients (N, P, Si), suspended sediments, and humic materials; radical redistributions of pelagic organisms such as copepods and fish; low phutoplankton biomass and primary productivity in the upper estuary; and elimination of freshwater-intolerant species of macroalgae and benthic infauna from the upper estuary. Other mechanisms modulate this river-driven annual cycle: (1) wind speed is highly seasonal (strongest in summer) and causes seasonal variations in atmosphere-water column exchange of dissolved gases, resuspension, and the texture of surficial sediments; (2) seasonal variations in the coastal ocean (e.g. the spring-summer upwelling season) influence species composition of plankton and nutrient concentrations that are advected into the bay; and (3) the annual temperature cycle influences a few selected features (e.g. production and hatching of copepod resting eggs). Much of the interannual variability in San Francisco Bay is also correlated with freshwater inflow: wet years with persistently high river discharge are characterized by persistent winter-type conditions. Mechanisms of short-term variability are not as well understood, although some responses to storm events (pulses in residual currents from wind forcing, erosion of surficial sediments by wind waves, redistribution of fish populations) and the neap-spring tidal cycle (enhanced salinity stratification, gravitational circulation, and phytoplankton biomass during neap tides) have been quantified. In addition to these somewhat predictable features of variability are (1) largely unexplained episodic events (e.g. anomalous blooms of drift macroalgae), and (2) long-term trends directly attributable to human activities (e.g. introduction of exotic species that become permanent members of the biota). ?? 1985 Dr W. Junk Publishers.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers","doi":"10.1007/BF00048697","issn":"00188158","usgsCitation":"Cloern, J., and Nichols, F., 1985, Time scales and mechanisms of estuarine variability, a synthesis from studies of San Francisco Bay: Hydrobiologia, v. 129, no. 1, p. 229-237, https://doi.org/10.1007/BF00048697.","startPage":"229","endPage":"237","numberOfPages":"9","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":205237,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00048697"},{"id":222438,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"129","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb3abe4b08c986b325f24","contributors":{"authors":[{"text":"Cloern, J. E.","contributorId":59453,"corporation":false,"usgs":true,"family":"Cloern","given":"J. E.","affiliations":[],"preferred":false,"id":364401,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nichols, F.H.","contributorId":88020,"corporation":false,"usgs":true,"family":"Nichols","given":"F.H.","affiliations":[],"preferred":false,"id":364402,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012907,"text":"70012907 - 1985 - Geochemistry and petrogenesis of lamproites, late cretaceous age, Woodson County, Kansas, U.S.A.","interactions":[],"lastModifiedDate":"2024-03-19T16:57:59.645656","indexId":"70012907","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Geochemistry and petrogenesis of lamproites, late cretaceous age, Woodson County, Kansas, U.S.A.","docAbstract":"Lamproite sills and their associated sedimentary and contact metamorphic rocks from Woodson County, Kansas have been analyzed for major elements, selected trace elements, and strontium isotopic composition. These lamproites, like lamproites elsewhere, are alkalic (molecular
Ba and, to a lesser extent, K and Rb and have been transported from the intrusions at shallow depth into the surrounding contact metamorphic zone. The Silver City lamproite has vertical fractionation of some elements due either to volatile transport or to variations in the abundance of phenocrysts relative to groundmass most probably due to flow differentiation although multiple injection or fractional crystallization cannot be conclusively rejected.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(85)90289-3","issn":"00167037","usgsCitation":"Cullers, R., Ramakrishnan, S., Berendsen, P., and Griffin, T., 1985, Geochemistry and petrogenesis of lamproites, late cretaceous age, Woodson County, Kansas, U.S.A.: Geochimica et Cosmochimica Acta, v. 49, no. 6, p. 1383-1402, https://doi.org/10.1016/0016-7037(85)90289-3.","productDescription":"20 p.","startPage":"1383","endPage":"1402","numberOfPages":"20","costCenters":[],"links":[{"id":222230,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"49","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a16dbe4b0c8380cd552b2","contributors":{"authors":[{"text":"Cullers, R.L.","contributorId":103007,"corporation":false,"usgs":true,"family":"Cullers","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":364806,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ramakrishnan, S.","contributorId":71698,"corporation":false,"usgs":true,"family":"Ramakrishnan","given":"S.","email":"","affiliations":[],"preferred":false,"id":364805,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Berendsen, P.","contributorId":68037,"corporation":false,"usgs":true,"family":"Berendsen","given":"P.","affiliations":[],"preferred":false,"id":364804,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Griffin, T.","contributorId":108252,"corporation":false,"usgs":true,"family":"Griffin","given":"T.","email":"","affiliations":[],"preferred":false,"id":364807,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70012878,"text":"70012878 - 1985 - Strontium and oxygen isotopic variations in Mesozoic and Tertiary plutons of central Idaho","interactions":[],"lastModifiedDate":"2012-03-12T17:18:43","indexId":"70012878","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1336,"text":"Contributions to Mineralogy and Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Strontium and oxygen isotopic variations in Mesozoic and Tertiary plutons of central Idaho","docAbstract":"Regional variations in initial 87Sr/86Sr ratios (ri) of Mesozoic plutons in central Idaho locate the edge of Precambrian continental crust at the boundary between the late Paleozoic-Mesozoic accreted terranes and Precambrian sialic crust in western Idaho. The ri values increase abruptly but continuously from less than 0.704 in the accreted terranes to greater than 0.708 across a narrow, 5 to 15 km zone, characterized by elongate, lens-shaped, highly deformed plutons and schistose metasedimentary and metavolcanic units. The chemical and petrologic character of the plutons changes concomitantly from ocean-arc-type, diorite-tonalite-trondhjemite units to a weakly peraluminous, calcic to calcalkalic tonalite-granodiorite-granite suite (the Idaho batholith). Plutons in both suites yield Late Cretaceous ages, but Permian through Early Cretaceous bodies are confined to the accreted terranes and early Tertiary intrusions are restricted to areas underlain by Precambrian crust. The two major terranes were juxtaposed between 75 and 130 m.y. ago, probably between 80 and 95 m.y. Oxygen and strontium isotopic ratios and Rb and Sr concentrations of the plutonic rocks document a significant upper-crustal contribution to the magmas that intrude Precambrian crust. Magmas intruding the arc terranes were derived from the upper mantle/subducted oceanic lithosphere and may have been modified by anatexis of earlier island-arc volcanic and sedimentary units. Plutons near the edge of Precambrian sialic crust represent simple mixtures of the Precambrian wall-rocks with melts derived from the upper mantle or subducted oceanic lithosphere with ri of 0.7035. Rb/Sr varies linearly with ri, producing \"pseudoisochrons\" with apparent \"ages\" close to the age of the wall rocks. Measured ??18O values of the wall rocks are less than those required for the assimilated end-member by Sr-O covariation in the plutons, however, indicating that wall-rock ??18O was reduced significantly by exchange with circulating fluids. Metasedimentary rocks of the Belt Supergroup are similarly affected near the batholith, documenting a systematic depletion in 18O as much as 50 km from the margin of the batholith. Plutons of the Bitterroot lobe of the Idaho batholith are remote from the accreted terranes and represent mixtures of Precambrian wall-rocks with melts dominated by continental lower crust (ri>0.708) rather than mantle. \"Pseudoisochrons\" resulting from these data are actually mixing lines that yield apparent \"ages\" less than the true age of the wall rocks and meaningless \"ri\". Assimilation/ fractional-crystallization models permit only insignificant amounts of crystal fractionation during anatexis and mixing for the majority of plutons of the region. ?? 1985 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Contributions to Mineralogy and Petrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF00378269","issn":"00107999","usgsCitation":"Fleck, R., and Criss, R., 1985, Strontium and oxygen isotopic variations in Mesozoic and Tertiary plutons of central Idaho: Contributions to Mineralogy and Petrology, v. 90, no. 2-3, p. 291-308, https://doi.org/10.1007/BF00378269.","startPage":"291","endPage":"308","numberOfPages":"18","costCenters":[],"links":[{"id":205285,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00378269"},{"id":222684,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"90","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9ba5e4b08c986b31cff4","contributors":{"authors":[{"text":"Fleck, R.J.","contributorId":25147,"corporation":false,"usgs":true,"family":"Fleck","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":364743,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Criss, R.E.","contributorId":10075,"corporation":false,"usgs":true,"family":"Criss","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":364742,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012710,"text":"70012710 - 1985 - Ice-lubricated gravity spreading of the Olympus Mons aureole deposits","interactions":[],"lastModifiedDate":"2025-02-28T17:04:04.35969","indexId":"70012710","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Ice-lubricated gravity spreading of the Olympus Mons aureole deposits","docAbstract":"Gravity sliding and spreading at low strain rates can account for the general morphology and structure of the aureoles and basal scarp of Olympus Mons. Detachment sliding could have occurred around the volcano if either pore-fluid pressures were exceptionally high (greater than 90%) or the rocks had very low resistance to shear (about 1 × 105 Pa or 1 bar). Because of the vast areal extent and probable shallow depth of the detachment zone, development of ubiquitous, high pore-fluid pressures beneath aureole-forming material was unlikely. However, a zone of sufficiently weak material consisting of about 10% interstitial or interbedded ice could have been present. If so, a simple rheologic model for the aureole deposits can be applied that consists of a thin ductile layer overlain by a thicker brittle layer. According to this model, extensional deformation would have occurred near the shield and compressional deformation in its distal parts. Proximal grabens and distal corrugations on aureole surfaces support this model. A submarine slide at Kitimat Arm, British Columbia, is a valid qualitative analogy for the observed features and inferred emplacement style of the aureole deposits. Ground-ice processes have been considered the cause of many geologic features on Mars; a 3% average concentration of ground ice in the regolith is predicted by theoretical models for the ice budget and cryosphere. Ice may have been deposited in higher concentrations below the aureole-forming material; the source of the ice could have been juvenile water circulated hydrothermally by Olympus Mons volcanism. The basal scarp of Olympus Mons apparently demarcates the transition between the upper, stable part of the shield and its lower part that decoupled and formed the aureole deposits. This transition may reflect a change in the bulk shear strength of the shield, caused either by a radial dependence in the abundance of ice or fluid in the shield materials or by the concentration of intrusive dikes within the volcano. Other Martian volcanoes exhibit virtually no evidence of similar large-scale gravity spreading and basal scarps. Perhaps such evidence, if it existed, has been buried by lava flows, or perhaps the smaller size of other volcanoes did not permit the development of these features.
","language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(85)90117-4","issn":"00191035","usgsCitation":"Tanaka, K.L., 1985, Ice-lubricated gravity spreading of the Olympus Mons aureole deposits: Icarus, v. 62, no. 2, p. 191-206, https://doi.org/10.1016/0019-1035(85)90117-4.","productDescription":"16 p.","startPage":"191","endPage":"206","numberOfPages":"16","costCenters":[],"links":[{"id":221966,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"62","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a37fae4b0c8380cd61324","contributors":{"authors":[{"text":"Tanaka, K. L.","contributorId":31394,"corporation":false,"usgs":false,"family":"Tanaka","given":"K.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":364292,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70180829,"text":"70180829 - 1985 - A model for estimating deficits in the size of spawning stocks for spring Chinook salmon in tributaries of the upper Columbia River basin","interactions":[],"lastModifiedDate":"2017-02-03T14:10:20","indexId":"70180829","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"title":"A model for estimating deficits in the size of spawning stocks for spring Chinook salmon in tributaries of the upper Columbia River basin","docAbstract":"No abstract available
","language":"English","publisher":"U.S. Fish and Wildlife Service ","publisherLocation":"Portland, OR","usgsCitation":"McIntyre, J., 1985, A model for estimating deficits in the size of spawning stocks for spring Chinook salmon in tributaries of the upper Columbia River basin.","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":334711,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5895a4d6e4b0fa1e59bc1ee3","contributors":{"authors":[{"text":"McIntyre, J.D.","contributorId":27006,"corporation":false,"usgs":true,"family":"McIntyre","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":662538,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":30582,"text":"wri854292 - 1985 - Limnology of nine small lakes, Matanuska-Susitna Borough, Alaska, and the survival and growth rates of rainbow trout","interactions":[],"lastModifiedDate":"2023-03-14T21:16:27.755353","indexId":"wri854292","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"85-4292","title":"Limnology of nine small lakes, Matanuska-Susitna Borough, Alaska, and the survival and growth rates of rainbow trout","docAbstract":"The survival and growth rates of rainbow trout (Salmo gairdnieri) were concurrently measured with selected limnological characteristics in nine small (surface area < 25 sq hectometers) lakes in the Matanuska-Susitna Borough. The project goal was to develop empirical models for predicting rainbow trout growth rates from the following variables: total phosphorus concentration, chlorophyll a concentration, Secchi disc transparency, or the morphoedaphic index--a means of characterizing potential biological productivity. No suitable model could be developed from the data collected during 1982 and 1983. The lack of significant correlation was attributed in part to the wide variation in survival of rainbow trout. Winterkills, caused by severe depletion of dissolved oxygen, were suspected in four of the lakes. Varied levels of fishing pressure and competition with threespine stickleback (Gasterosteus aculeatus) also influenced survival of rainbow trout but their effects were overshadowed by winterkill. Predictive capability was also reduced because of inconsistencies in rankings generated by each of the four limnological variables chosen as indicators of potential biological productivity. A lake ranked low in productivity by one variable was commonly ranked high in productivity by another variable. The survivability of rainbow trout stocked in lakes such as these nine may be a more important indicator of potential biomass production than are indicators of lake fertility. Assessments of a lake 's susceptibility to winterkill and the degree of competition with threespine stickleback are suggested as important topics for additional research.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wri854292","usgsCitation":"Woods, P.F., 1985, Limnology of nine small lakes, Matanuska-Susitna Borough, Alaska, and the survival and growth rates of rainbow trout: U.S. Geological Survey Water-Resources Investigations Report 85-4292, iv, 32 p., https://doi.org/10.3133/wri854292.","productDescription":"iv, 32 p.","costCenters":[],"links":[{"id":414141,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_36430.htm","linkFileType":{"id":5,"text":"html"}},{"id":59341,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1985/4292/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":123988,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1985/4292/report-thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Matanuska-Susitna Borough, Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -149.817,\n 61.833\n ],\n [\n -149.817,\n 61.45\n ],\n [\n -148.267,\n 61.45\n ],\n [\n -148.267,\n 61.833\n ],\n [\n -149.817,\n 61.833\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b15e4b07f02db6a50f9","contributors":{"authors":[{"text":"Woods, P. F.","contributorId":97509,"corporation":false,"usgs":true,"family":"Woods","given":"P.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":203490,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013052,"text":"70013052 - 1985 - A nomogram for interpreting slope stability of fine-grained deposits in modern and ancient-marine environments.","interactions":[],"lastModifiedDate":"2024-05-21T11:17:03.144979","indexId":"70013052","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"A nomogram for interpreting slope stability of fine-grained deposits in modern and ancient-marine environments.","docAbstract":"Design of the nomogram is based on effective stress and combines consolidation theory as applicable to depositional environments with the infinite-slope model of slope-stability analysis. The link between the two combined theories is a term representing the effective overburden stress, which may be predicted from consolidation theory and a knowledge of sedimentation rate, time, and the coefficient of consolidation. In turn, if infinite-slope conditions are assumed to exist, the effective overburden stress can be used to derive a factor of safety against static slope failure by using the angle of internal friction and the slope angle. The nomogram applies to depostitional settings in which fine-grained sediment has accumulated at a relatively constant rate upon a base that is essentially impermeable. The model further assumes that the lateral extent of sediment affected by any mass movement will be great compared to its thickness and that no outside agents (e.g., cements, gas) are influencing the section. The nomogram is applicable to static conditions (inherent stability of the slope) and certain dynamic conditions (such as earthquakes). It may be used to investigate mass movements in the geologic past as well as those in modern environments.--Modified journal abstract.
Limnocythere bradburyi is a new species of nonmarine ostracode that is living in several lakes in the central Mexican Plateau. These lakes are shallow, turbid, and pan-shaped, having relatively unstable and fluid substrates. Water levels of these lakes are high in the summer and low or dry in the winter. These lakes usually contain fresh to slightly saline water during the rainy season (summer-fall) and slightly saline water during the dry season (winter-spring), and have solute composition that is dominated by Na+, HCO3--CO32-, Cl- ions. The regional climate is characterized as humid temperate with mild equitable temperatures throughout the year. Winter temperatures are usually above 0oC, whereas summer temperatures are commonly below 30oC. The water temperature of the lakes containing L. bradburyi generally reflects atmospheric temperatures. The ostracode's life cycle coincides with the climatic wet cycle and is therefore completed during the warmest period of the year, which is in marked contrast to ostracodes living in lakes in the US and Canada that usually begin their life cycle with the spring rain and snow melt in cold water and complete their life cycle in warm water. This contrasting climatic life-cycle pattern between central Mexico and the US may be sufficient to explain why L. bradburyi occurs commonly in many Quaternary deposits in the southwestern US, but has not been found living in the US.
","language":"English","publisher":"Paleontological Society","issn":"00223360","usgsCitation":"Forester, R.M., 1985, Limnocythere bradburyi n.sp.: a modern ostracode from central Mexico and a possible Quaternary paleoclimatic indicator: Journal of Paleontology, v. 59, no. 1, p. 8-20.","productDescription":"13 p.","startPage":"8","endPage":"20","numberOfPages":"13","costCenters":[],"links":[{"id":430406,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://www.jstor.org/stable/1304823"},{"id":220121,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"59","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4797e4b0c8380cd678e9","contributors":{"authors":[{"text":"Forester, R. M.","contributorId":76332,"corporation":false,"usgs":true,"family":"Forester","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":365160,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70139731,"text":"70139731 - 1985 - Total chemical management in photographic processing","interactions":[],"lastModifiedDate":"2017-01-18T14:42:33","indexId":"70139731","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2348,"text":"Journal of Imaging Technology","active":true,"publicationSubtype":{"id":10}},"title":"Total chemical management in photographic processing","docAbstract":"The mission of the U. S. Geological Survey's Earth Resources Observation Systems (EROS) Data Center is to produce high-quality photographs of the earth taken from aircraft and Landsat satellite. In order to meet the criteria of producing research-quality photographs, while at the same time meeting strict environmental restrictions, a total photographic chemical management system was installed. This involved a three-part operation consisting of the design of a modern chemical analysis laboratory, the implementation of a chemical regeneration system, and the installation of a waste treatment system, including in-plant pretreatment and outside secondary waste treatment. Over the last ten years the result of this program has yielded high-quality photographs while saving approximately 30,000 per year and meeting all Environmental Protection Agency (EPA) restrictions.
","language":"English","publisher":"Society for Imaging Science and Technology","usgsCitation":"Luden, C., and Schultz, R., 1985, Total chemical management in photographic processing: Journal of Imaging Technology, v. 11, no. 2, p. 74-82.","productDescription":"9 p.","startPage":"74","endPage":"82","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":297641,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","volume":"11","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"54dd2c73e4b08de9379b3805","contributors":{"authors":[{"text":"Luden, Charles","contributorId":138995,"corporation":false,"usgs":false,"family":"Luden","given":"Charles","email":"","affiliations":[],"preferred":false,"id":539619,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schultz, Ronald","contributorId":13815,"corporation":false,"usgs":false,"family":"Schultz","given":"Ronald","email":"","affiliations":[],"preferred":false,"id":539620,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013050,"text":"70013050 - 1985 - SENSITIVITY OF STRUCTURAL RESPONSE TO GROUND MOTION SOURCE AND SITE PARAMETERS.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:36","indexId":"70013050","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"SENSITIVITY OF STRUCTURAL RESPONSE TO GROUND MOTION SOURCE AND SITE PARAMETERS.","docAbstract":"Designing structures to withstand earthquakes requires an accurate estimation of the expected ground motion. While engineers use the peak ground acceleration (PGA) to model the strong ground motion, seismologists use physical characteristics of the source and the rupture mechanism, such as fault length, stress drop, shear wave velocity, seismic moment, distance, and attenuation. This study presents a method for calculating response spectra from seismological models using random vibration theory. It then investigates the effect of various source and site parameters on peak response. Calculations are based on a nonstationary stochastic ground motion model, which can incorporate all the parameters both in frequency and time domains. The estimation of the peak response accounts for the effects of the non-stationarity, bandwidth and peak correlations of the response.","conferenceTitle":"Soil Dynamics and Earthquake Engineering, Proceedings of the 2nd International Conference.","conferenceLocation":"Aboard the Queen Elizabeth 2, New York to Southampton","language":"English","publisher":"Computational Mechanics Ltd","publisherLocation":"Southampton, Engl","isbn":"0905451341","usgsCitation":"Safak, E., 1985, SENSITIVITY OF STRUCTURAL RESPONSE TO GROUND MOTION SOURCE AND SITE PARAMETERS., Soil Dynamics and Earthquake Engineering, Proceedings of the 2nd International Conference., Aboard the Queen Elizabeth 2, New York to Southampton.","costCenters":[],"links":[{"id":220173,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaf35e4b0c8380cd87453","contributors":{"editors":[{"text":"Brebbia, C.A.","contributorId":112425,"corporation":false,"usgs":true,"family":"Brebbia","given":"C.A.","affiliations":[],"preferred":false,"id":508473,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Cakmak, A.S.","contributorId":114101,"corporation":false,"usgs":true,"family":"Cakmak","given":"A.S.","email":"","affiliations":[],"preferred":false,"id":508475,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Ghaffar, Abdel","contributorId":113250,"corporation":false,"usgs":true,"family":"Ghaffar","given":"Abdel","email":"","affiliations":[],"preferred":false,"id":508474,"contributorType":{"id":2,"text":"Editors"},"rank":3}],"authors":[{"text":"Safak, Erdal","contributorId":73984,"corporation":false,"usgs":true,"family":"Safak","given":"Erdal","email":"","affiliations":[],"preferred":false,"id":365172,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70135867,"text":"70135867 - 1985 - Bottom current and sediment transport on San Pedro Shelf, California","interactions":[],"lastModifiedDate":"2014-12-18T09:41:46","indexId":"70135867","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"Bottom current and sediment transport on San Pedro Shelf, California","docAbstract":"GEOPROBE (Geological Processes Bottom Environmental) tripods were used to measure bottom currents, pressure, and light transmission and scattering and to obtain time-series photographs of the sea floor at depths of 23 m and 67 m on San Pedro shelf between 18 April and 6 June 1978. Winds were light (< 5 m/s) with a mean direction from the southwest throughout the measurement period. Hourly averaged currents 1 m above the bottom never exceeded 21 cm/s; average speeds were about 5 cm/s at the 23-m site and 6.8 cm/s at 67 m, and the strongest currents were produced by the tides. The mean flow of bottom water was less than 3 cm/s at both GEOPROBES and was rather persistently southward (offshelf). Wave-generated bottom currents and bottom-pressure variations were sampled at hourly intervals; average wave period and wave height were 12.8 s and 0.44 m, respectively, at the 23-m site. Wave orbital velocities ranged from about 5 to 30 cm/s at 23 m and from 2 to 8 cm/s at 67 m. Bottom photographs at 67 m show that the relatively sluggish tide-generated and mean currents were below threshold velocity for the silty, very fine sand throughout the observational period. Threshold depth for wave rippling of very fine sand averaged about 28 m with a range from about 12 m to 50 m. Wave-generated currents were the only currents that exceeded threshold levels. The wave currents maintained relatively high concentrations of sediment in suspension near the bottom over the inner shelf (< 25 m), and this material (principally silt and clay) was transported offshore by the weak mean flow. Approximately 50% of this material was deposited as the bottom orbital velocities decreased to subthreshold values ( nearly equal 10-15 cm/s). The observed movement of fine sediment across the inner shelf can account for a portion of the mud content of the modern silty sands on the central shelf and on the outer shelf. However, it is clear that the sand fractions, which constitute greater than 70% of the central shelf substrate, must be transported during high-energy winter storms.
","language":"English","publisher":"American Geological Institute","doi":"10.1306/212F85EE-2B24-11D7-8648000102C1865D","usgsCitation":"Drake, D.E., Cacchione, D.A., and Karl, H., 1985, Bottom current and sediment transport on San Pedro Shelf, California: Journal of Sedimentary Research, v. 55, no. 1, p. 15-28, https://doi.org/10.1306/212F85EE-2B24-11D7-8648000102C1865D.","productDescription":"14 p.","startPage":"15","endPage":"28","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":296781,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Pedro Shelf","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -124.4091796875,\n 42.19596877629178\n ],\n [\n -119.66308593749999,\n 41.96765920367816\n ],\n [\n -119.794921875,\n 38.993572058209466\n ],\n [\n -113.64257812499999,\n 34.30714385628804\n ],\n [\n -114.60937499999999,\n 32.43561304116276\n ],\n [\n -118.43261718749999,\n 32.62087018318113\n ],\n [\n -124.49707031249999,\n 39.13006024213511\n ],\n [\n -124.4091796875,\n 42.19596877629178\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"55","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"54dd2b49e4b08de9379b32f3","contributors":{"authors":[{"text":"Drake, David E.","contributorId":74752,"corporation":false,"usgs":true,"family":"Drake","given":"David","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":536941,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cacchione, David A.","contributorId":37327,"corporation":false,"usgs":true,"family":"Cacchione","given":"David","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":536942,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Karl, Herman A.","contributorId":55796,"corporation":false,"usgs":true,"family":"Karl","given":"Herman A.","affiliations":[],"preferred":false,"id":536943,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ]}