{"pageNumber":"1521","pageRowStart":"38000","pageSize":"25","recordCount":41032,"records":[{"id":7782,"text":"ofr83677 - 1983 - Hydrology of the Jasper (Miocene) Aquifer in the Southeast Texas coastal plain","interactions":[],"lastModifiedDate":"2025-09-23T16:51:31.349837","indexId":"ofr83677","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"83-677","title":"Hydrology of the Jasper (Miocene) Aquifer in the Southeast Texas coastal plain","docAbstract":"<p>The Jasper (Miocene) aquifer is one of several important hydrologic units in the Gulf Coastal Plain. Because the Jasper aquifer underlies shallower aquifers in many areas, regional water withdrawals from the Jasper are not significant; however, it is capable of yielding 3,000 gallons per minute (200 liters per second) or more of water to wells in certain areas. The Jasper is underlain by the Catahoula confining system (restricted) and overlain by the Burkeville confining system. The Evangeline and Chicot aquifers, in turn, overlie the Burkeville and also are prolific water-yielding aquifers.</p><p>The ground-water hydrology of the Jasper aquifer in an area of about 20,000 square miles (52,000 square kilometers) was simulated by a two-dimensional digital model using a steady-state approach. The model represents hydrologic conditions prior to development by wells, when natural recharge equaled natural discharge. The model's grid pattern of 15 x 24 nodes varies from a dimension of 5 by 10 miles (8 by 16 kilometers) in the outcrop to 10 by 10 miles (16 by 16 kilometers) in the artesian section downdip from the outcrop.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr83677","collaboration":"Prepared in cooperation with the Texas Department of Water Resources","usgsCitation":"Baker, E., 1983, Hydrology of the Jasper (Miocene) Aquifer in the Southeast Texas coastal plain: U.S. Geological Survey Open-File Report 83-677, Report: viii, 68 p.; 17 Plates: 20.28 x 10.58 inches or smaller, https://doi.org/10.3133/ofr83677.","productDescription":"Report: viii, 68 p.; 17 Plates: 20.28 x 10.58 inches or smaller","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science 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,{"id":4409,"text":"cir898 - 1983 - Summary of workshops concerning regional seismic source zones of parts of the conterminous United States, convened by the U.S. Geological Survey, 1979-1980, Golden, Colorado","interactions":[],"lastModifiedDate":"2018-06-21T10:36:05","indexId":"cir898","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"898","title":"Summary of workshops concerning regional seismic source zones of parts of the conterminous United States, convened by the U.S. Geological Survey, 1979-1980, Golden, Colorado","docAbstract":"<p>Workshops were convened by the U.S. Geological Survey to obtain the latest information and concepts relative to defining seismic source zones for five regions of the United States. The zones, with some modifications, have been used in preparation of new national probabilistic ground motion hazard maps by the U.S. Geological Survey. </p><p>The five regions addressed are the Great Basin, the Northern Rocky Mountains, the Southern Rocky Mountains, the Central Interior, and the northeastern United States. Discussions at the workshops focussed on possible temporal and spatial variations of seismicity within the regions, latest ages of surface-fault displacements, most recent uplift or subsidence, geologic structural provinces as they relate to seismicity, and speculation on earthquake causes. </p><p>Within the Great Basin region, the zones conform to areas characterized by a predominance of faults that have certain ages of latest surface displacements. In the Northern and Southern Rocky Mountain regions, zones primarily conform to distinctive structural terrane. In the Central Interior, primary emphasis was placed on an interpretation of the areal distribution of historic seismicity, although geophysical studies in the Reelfoot rift area provided data for defining zones in the New Madrid earthquake area. An interpretation of the historic seismicity also provided the basis for drawing the zones of the New England region. </p><p>Estimates of earthquake maximum magnitudes and of recurrence times for these earthquakes are given for most of the zones and are based on either geologic data or opinion.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/cir898","usgsCitation":"Thenhaus, P., McKeown, F.A., Bucknam, R., Ross, D.C., Anderson, R., Irwin, W., Russ, D.P., and Diment, W., 1983, Summary of workshops concerning regional seismic source zones of parts of the conterminous United States, convened by the U.S. Geological Survey, 1979-1980, Golden, Colorado: U.S. Geological Survey Circular 898, iii, 36 p., https://doi.org/10.3133/cir898.","productDescription":"iii, 36 p.","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":31516,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/circ/1983/0898/report.pdf","text":"Report","size":"1.39 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"},{"id":124428,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/circ/1983/0898/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b00e4b07f02db698075","contributors":{"editors":[{"text":"Thenhaus, Paul C.","contributorId":91857,"corporation":false,"usgs":true,"family":"Thenhaus","given":"Paul","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":694739,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Thenhaus, P.C.","contributorId":46089,"corporation":false,"usgs":true,"family":"Thenhaus","given":"P.C.","affiliations":[],"preferred":false,"id":694731,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKeown, F. A.","contributorId":106100,"corporation":false,"usgs":true,"family":"McKeown","given":"F.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":694732,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bucknam, R.C.","contributorId":35744,"corporation":false,"usgs":true,"family":"Bucknam","given":"R.C.","affiliations":[],"preferred":false,"id":694733,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ross, D. C.","contributorId":103681,"corporation":false,"usgs":true,"family":"Ross","given":"D.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":694734,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Anderson, R.E.","contributorId":91479,"corporation":false,"usgs":true,"family":"Anderson","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":694735,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Irwin, W. P.","contributorId":82347,"corporation":false,"usgs":true,"family":"Irwin","given":"W. P.","affiliations":[],"preferred":false,"id":694736,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Russ, D. P.","contributorId":38538,"corporation":false,"usgs":true,"family":"Russ","given":"D.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":694737,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Diment, W.H.","contributorId":54992,"corporation":false,"usgs":true,"family":"Diment","given":"W.H.","affiliations":[],"preferred":false,"id":694738,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":39663,"text":"pp1313 - 1983 - Studies related to the Charleston, South Carolina, earthquake of 1886 — Tectonics and seismicity","interactions":[],"lastModifiedDate":"2025-08-29T17:51:46.450803","indexId":"pp1313","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1313","title":"Studies related to the Charleston, South Carolina, earthquake of 1886 — Tectonics and seismicity","docAbstract":"<p>Since 1973, the U.S. Geological Survey (USGS), with support from the Nuclear Regulatory Commission, has conducted extensive investigations of the tectonic and seismic history of the Charleston, S.C., earthquake zone and surrounding areas. The goal of these investigations has been to discover the cause of the large intraplate Charleston earthquake of 1886, which dominates the record of seismicity in the Southeastern United States, through an understanding of the historic and modern seismicity at Charleston and of the tectonic setting of the seismicity. This goal is being pursued to evaluate the potential for additional large earthquakes in the Charleston area and surrounding regions and to determine whether the Charleston area differs tectonically in any significant fashion from other parts of the Southeastern United States. An understanding of the specific cause for the 1886 event and of the regional distribution of any structures that are generically related to or geometrically and mechanically similar to the source structure is essential for evaluation of seismic hazards throughout the Southeast.</p><p>The results given herein represent significant progress toward understanding the tectonic setting of the Charleston-area seismicity. Several chapters in the volume address the distribution and origin of pre-Cretaceous rocks and structures beneath Coastal Plain sediments in the Charleston area and regionally beneath the southern Atlantic Coastal Plain and adjacent Continental Shelf. The modern seismicity at Charleston is occurring at depths equal to or greater than the known extent of these older structures, and rejuvenation of an older fault in the modern stress field is a possible cause of the seismicity. Accordingly, several chapters discuss the possible relationships of the various pre-Cretaceous structures to faults identified near Charleston that have a known Cretaceous and Cenozoic movement history and to the historic and instrumentally recorded seismicity. However, at the present time, none of the young structures can be related unequivocally to the seismicity because earthquake fault-plane solutions and hypocenter distributions do not agree with the locations and orientations of these structures. Therefore, a major emphasis of continuing USGS investigations near Charleston will be to identify additional faults, if any exist, to delineate fault movement histories, and to further refine earthquake locations, focal mechanisms, and related seismological interpretations.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/pp1313","collaboration":"Prepared in cooperation with the U.S. Nuclear Regulatory Commission","usgsCitation":"Gottfried, D., Annell, C.S., Byerly, G.R., Lanphere, M.A., Phillips, J.D., Gohn, G., Houser, B.B., Schneider, R.R., Ackermann, H.D., Yantis, B.R., Costain, J.K., Schilt, F.S., Brown, L., Oliver, J.E., Kaufman, S., Hamilton, R.M., Behrendt, J.C., Henry, V.J., Bayer, K.C., Daniels, D.L., Zietz, I., Popenoe, P., Chowns, T.M., Williams, C.T., Dooley, R.E., Wampler, J., Dillon, W.P., Klitgord, K.D., Paull, C.K., McGinnis, L.D., Dewey, J.W., Tarr, A.C., Rhea, S., Wentworth, C.M., Mergner-Keefer, M., and Bollinger, G.A., 1983, Studies related to the Charleston, South Carolina, earthquake of 1886 — Tectonics and seismicity: U.S. Geological Survey Professional Paper 1313, Report: 467 p.; 8 Plates: 47.36 x 40.73 inches or smaller, https://doi.org/10.3133/pp1313.","productDescription":"Report: 467 p.; 8 Plates: 47.36 x 40.73 inches or smaller","additionalOnlineFiles":"Y","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":104598,"rank":14,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_4798.htm","text":"Regenerate faults of small Cenozoic offset - 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Plate 1"},{"id":340375,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/pp/1313/pp1313I_plate-1.pdf","text":"1313-I Plate 1","linkFileType":{"id":1,"text":"pdf"}},{"id":340377,"rank":4,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/pp/1313/pp1313J_plate-2.pdf","text":"1313-J Plate 2","linkFileType":{"id":1,"text":"pdf"}},{"id":340378,"rank":5,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/pp/1313/pp1313J_plate-3.pdf","text":"1313-J Plate 3","linkFileType":{"id":1,"text":"pdf"}},{"id":340379,"rank":6,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/pp/1313/pp1313K_plate-1.pdf","text":"1313-K Plate 1","linkFileType":{"id":1,"text":"pdf"}},{"id":399785,"rank":11,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_4795.htm","text":"Mesozoic tectonics of the southeastern United States coastal plain and continental margin"},{"id":104596,"rank":12,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_4796.htm","text":"Studies related to the Charleston, South Carolina, earthquake of 1886 - tectonics and seismicity","linkFileType":{"id":5,"text":"html"},"description":"4796"},{"id":340381,"rank":8,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/pp/1313/pp1313P_plate-1.pdf","text":"1313-P Plate 1","linkFileType":{"id":1,"text":"pdf"}},{"id":340376,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/pp/1313/pp1313J_plate-1.pdf","text":"1313-J Plate 1","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Florida, Georgia, South Carolina","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -83,\n              30\n            ],\n            [\n              -78,\n              30\n            ],\n            [\n              -78,\n              34\n            ],\n            [\n              -83,\n              34\n            ],\n            [\n              -83,\n              30\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","tableOfContents":"<ul><li>Part A: Geochemistry and tectonic significance of subsurface basalts near Charleston, South Carolina: Clubhouse crossroads test holes #2 and #3<br></li><li>Part B:&nbsp;<sup>40</sup>Ar/<sup>39</sup>Ar ages of basalt from clubhouse crossroads test hole #2, near Charleston, South Carolina<br></li><li>Part C:&nbsp;Paleomagnetic investigations of the clubhouse crossroads basalt<br></li><li>Part D:&nbsp;Geology of the Lower Mesozoic(?) sedimentary rocks in clubhouse crossroads test hole #3, near Charleston, South Carolina<br></li><li>Part E:&nbsp;Geology of the basement rocks aear Charleston, South Carolina - Data from detrital rock fragments in Lower Mesozoic(?) rocks in clubhouse crossroads test hole #3<br></li><li>Part F:&nbsp;Seismic-refraction study in the area of the Charleston, South Carolina, 1886 earthquake<br></li><li>Part G:&nbsp;A reflection seismic study near Charleston, South Carolina<br></li><li>Part H:&nbsp;Subsurface structure near Charleston, South Carolina - Results of COCORP reflection profiling in the Atlantic Coastal Plain<br></li><li>Part I:&nbsp;Land multichannel seismic-reflection evidence for tectonic features near Charleston, South Carolina<br></li><li>Part J: Marine multichannel seismic-reflection evidence for cenozoic faulting and deep crustal structure near Charleston, South Carolina<br></li><li>Part K: Distribution of subsurface lower Mesozoic rocks in the southeastern United States, as interpreted from regional aeromagnetic and gravity maps<br></li><li>Part L:&nbsp;Pre-Cretaceous rocks beneath the Georgia coastal plain - Regional implications<br></li><li>Part M:&nbsp;Potassium-Argon relations in diabase dikes of Georgia - The influence of excess <sup>40</sup>Ar on the geochronology of early Mesozoic igneous and tectonic events<br></li><li>Part N:&nbsp;Mesozoic development and structure of the continental margin off South Carolina<br></li><li>Part O:&nbsp;Basement structure indicated by seismic-refraction measurements offshore from South Carolina and adjacent areas<br></li><li>Part P:&nbsp;Mesozoic tectonics of the southeastern United States coastal plain and continental margin<br></li><li>Part Q:&nbsp;Relocation of instrumentally recorded pre-1974 earthquakes in the South Carolina region<br></li><li>Part R:&nbsp;Seismicity near Charleston, South Carolina, March 1973 to December 1979<br></li><li>Part S:&nbsp;Regenerate faults of small Cenozoic offset - Probable earthquake sources in the southeastern United States<br></li><li>Part T:&nbsp;Speculations on the nature of seismicity at Charleston, South Carolina<br></li></ul><p>&nbsp;<br></p>","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db699d12","contributors":{"editors":[{"text":"Gohn, Gregory S.","contributorId":50155,"corporation":false,"usgs":true,"family":"Gohn","given":"Gregory S.","affiliations":[],"preferred":false,"id":685751,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Gottfried, David","contributorId":82295,"corporation":false,"usgs":true,"family":"Gottfried","given":"David","email":"","affiliations":[],"preferred":false,"id":685746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Annell, C. 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M.","contributorId":189709,"corporation":false,"usgs":false,"family":"Chowns","given":"T.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":685779,"contributorType":{"id":1,"text":"Authors"},"rank":23},{"text":"Williams, C. T.","contributorId":90950,"corporation":false,"usgs":true,"family":"Williams","given":"C.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":685780,"contributorType":{"id":1,"text":"Authors"},"rank":24},{"text":"Dooley, Robert E.","contributorId":189710,"corporation":false,"usgs":false,"family":"Dooley","given":"Robert","email":"","middleInitial":"E.","affiliations":[{"id":27526,"text":"Georgia Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":685781,"contributorType":{"id":1,"text":"Authors"},"rank":25},{"text":"Wampler, J.","contributorId":27776,"corporation":false,"usgs":true,"family":"Wampler","given":"J.","email":"","affiliations":[],"preferred":false,"id":685782,"contributorType":{"id":1,"text":"Authors"},"rank":26},{"text":"Dillon, William P. bdillon@usgs.gov","contributorId":79820,"corporation":false,"usgs":true,"family":"Dillon","given":"William","email":"bdillon@usgs.gov","middleInitial":"P.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":685783,"contributorType":{"id":1,"text":"Authors"},"rank":27},{"text":"Klitgord, Kim D.","contributorId":82307,"corporation":false,"usgs":true,"family":"Klitgord","given":"Kim","email":"","middleInitial":"D.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":685784,"contributorType":{"id":1,"text":"Authors"},"rank":28},{"text":"Paull, Charles K. 0000-0001-5940-3443","orcid":"https://orcid.org/0000-0001-5940-3443","contributorId":55825,"corporation":false,"usgs":false,"family":"Paull","given":"Charles","email":"","middleInitial":"K.","affiliations":[{"id":7043,"text":"University of North Carolina","active":true,"usgs":false}],"preferred":true,"id":685785,"contributorType":{"id":1,"text":"Authors"},"rank":29},{"text":"McGinnis, Lyle D.","contributorId":189711,"corporation":false,"usgs":false,"family":"McGinnis","given":"Lyle","email":"","middleInitial":"D.","affiliations":[{"id":13666,"text":"Northern Illinois University","active":true,"usgs":false}],"preferred":false,"id":685786,"contributorType":{"id":1,"text":"Authors"},"rank":30},{"text":"Dewey, James W. 0000-0001-8838-2450 jdewey@usgs.gov","orcid":"https://orcid.org/0000-0001-8838-2450","contributorId":5819,"corporation":false,"usgs":true,"family":"Dewey","given":"James","email":"jdewey@usgs.gov","middleInitial":"W.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":685788,"contributorType":{"id":1,"text":"Authors"},"rank":31},{"text":"Tarr, Arthur C. atarr@usgs.gov","contributorId":1925,"corporation":false,"usgs":true,"family":"Tarr","given":"Arthur","email":"atarr@usgs.gov","middleInitial":"C.","affiliations":[],"preferred":true,"id":685789,"contributorType":{"id":1,"text":"Authors"},"rank":32},{"text":"Rhea, Susan","contributorId":81110,"corporation":false,"usgs":true,"family":"Rhea","given":"Susan","email":"","affiliations":[],"preferred":false,"id":685790,"contributorType":{"id":1,"text":"Authors"},"rank":33},{"text":"Wentworth, Carl M. 0000-0003-2569-569X cwent@usgs.gov","orcid":"https://orcid.org/0000-0003-2569-569X","contributorId":1178,"corporation":false,"usgs":true,"family":"Wentworth","given":"Carl","email":"cwent@usgs.gov","middleInitial":"M.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":685791,"contributorType":{"id":1,"text":"Authors"},"rank":34},{"text":"Mergner-Keefer, Marcia","contributorId":40224,"corporation":false,"usgs":true,"family":"Mergner-Keefer","given":"Marcia","email":"","affiliations":[],"preferred":false,"id":685792,"contributorType":{"id":1,"text":"Authors"},"rank":35},{"text":"Bollinger, G. A.","contributorId":55809,"corporation":false,"usgs":true,"family":"Bollinger","given":"G.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":685798,"contributorType":{"id":1,"text":"Authors"},"rank":36}]}}
,{"id":70164482,"text":"70164482 - 1983 - The fallout rate of PB-210 on the western coast of the United States","interactions":[],"lastModifiedDate":"2016-07-27T10:36:11","indexId":"70164482","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"The fallout rate of PB-210 on the western coast of the United States","docAbstract":"<p><span>The deposition rate of atmospheric Pb-210 has been measured during a one year period using plastic funnels as collectors. Observed rates were 0.15 dpm cm</span><sup><span>&minus;2</span></sup><span>&nbsp;yr</span><sup><span>&minus;1</span></sup><span><sup>&nbsp;</sup>at a site in Palo Alto, California and 0.21 dpm cm</span><sup><span>&minus;2</span></sup><span>&nbsp;yr</span><sup><span>&minus;1</span></sup><span>&nbsp;at a site in Los Angeles. The Palo Alto value agrees well with a long-term average of 0.14 dpm cm</span><sup><span>&minus;2</span></sup><span>&nbsp;yr</span><sup><span>&minus;1</span></sup><span>, obtained from a nearby salt marsh core. These rates are only one-third of those previously estimated using global models for Pb-210 fallout and indicate the need to consider both longitude and precipitation as factors controlling fallout rates. More than 75% of the Pb-210 fallout occurs as wet deposition at the Los Angles site.</span></p>","language":"English","publisher":"AGU Publications","doi":"10.1029/GL010i012p01164","usgsCitation":"Fuller, C., and Hammond, D.E., 1983, The fallout rate of PB-210 on the western coast of the United States: Geophysical Research Letters, v. 10, no. 12, p. 1164-1167, https://doi.org/10.1029/GL010i012p01164.","productDescription":"4 p.","startPage":"1164","endPage":"1167","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true}],"links":[{"id":316650,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"12","noUsgsAuthors":false,"publicationDate":"2012-12-07","publicationStatus":"PW","scienceBaseUri":"56b9ca98e4b08d617f63a882","contributors":{"authors":[{"text":"Fuller, Christopher","contributorId":56982,"corporation":false,"usgs":true,"family":"Fuller","given":"Christopher","affiliations":[],"preferred":false,"id":597554,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hammond, Douglas E.","contributorId":67878,"corporation":false,"usgs":true,"family":"Hammond","given":"Douglas","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":597555,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70206843,"text":"70206843 - 1983 - Evidence for two pulses of glaciation during the late Proterozoic in northern Utah and southeastern Idaho","interactions":[],"lastModifiedDate":"2022-12-06T17:54:16.876959","indexId":"70206843","displayToPublicDate":"1983-12-31T08:02:05","publicationYear":"1983","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":"Evidence for two pulses of glaciation during the late Proterozoic in northern Utah and southeastern Idaho","docAbstract":"<p><span>A record of glaciation during late Proterozoic time is preserved in a number of localities extending from the Sheeprock Mountains, Utah, to Pocatello, Idaho, and from the Park City area 40 km east of Salt Lake City to the Deep Creek Range along the Utah-Nevada line. Over much of this area, the glacial deposits and associated rocks thicken westward and form the basal part of a miogeoclinal wedge that accumulated near the late Proterozoic and early Paleozoic continental margin. In the east, such deposits are thin and rest on Archean basement or rocks of Proterozoic Y age; in the west, they are part of thicker sequences in which deposition apparently continued without significant interruption from late Proterozoic into Cambrian time. In many places, the original continuity between the western and eastern parts of the depositional wedge has been obscured by thrusting of Cretaceous and early Tertiary age that carried the thick basinal sequences eastward over those deposited on the continental platform. Recent mapping of Fremont Island in Great Salt Lake, the Wasatch Range between Ogden and Brigham City, and the Sheeprock Mountains shows that glacial episodes represented either by diamictite or by dropstones enclosed in finegrained laminated beds are separated by as much as 1,000 m of non-glacial deposits, including black slate, alternating graywacke and siltstone, quartzite, and conglomerate. Using reasonable sedimentation rates for such deposits and by comparison with modern analogues, we infer that two episodes of glaciation, each probably consisting of multiple advances and retreats, were separated by a non-glacial interval of a few hundred thousand to a few million years' duration. Correlation of the allochthonous, miogeoclinal glacial deposits with the single glacial unit present in autochthonous and parautochthonous platform sites is uncertain, but our interpretation of sedimentary facies and paleogeography suggests that only the younger of the two episodes recorded in the allochthon is represented by the diamictites of the autochthon.</span></p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1983)94<437:EFTPOG>2.0.CO;2","usgsCitation":"Crittenden, M.D., Christie-Blick, N., and Link, P.K., 1983, Evidence for two pulses of glaciation during the late Proterozoic in northern Utah and southeastern Idaho: Geological Society of America Bulletin, v. 94, no. 4, p. 437-450, https://doi.org/10.1130/0016-7606(1983)94<437:EFTPOG>2.0.CO;2.","productDescription":"14 p.","startPage":"437","endPage":"450","costCenters":[],"links":[{"id":480220,"rank":3,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.7916/d8q24982","text":"External Repository"},{"id":369526,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":410110,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.geoscienceworld.org/gsa/gsabulletin/article/94/4/437/202851/Evidence-for-two-pulses-of-glaciation-during-the","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Idaho, Utah","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -115.1806640625,\n              39.90973623453719\n            ],\n            [\n              -110.0830078125,\n              39.90973623453719\n            ],\n            [\n              -110.0830078125,\n              43.59630591596548\n            ],\n            [\n              -115.1806640625,\n              43.59630591596548\n            ],\n            [\n              -115.1806640625,\n              39.90973623453719\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"94","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Crittenden, M. D. Jr.","contributorId":43421,"corporation":false,"usgs":true,"family":"Crittenden","given":"M.","suffix":"Jr.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":776017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Christie-Blick, N","contributorId":220862,"corporation":false,"usgs":false,"family":"Christie-Blick","given":"N","affiliations":[],"preferred":false,"id":776018,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Link, Paul K.","contributorId":271204,"corporation":false,"usgs":false,"family":"Link","given":"Paul","email":"","middleInitial":"K.","affiliations":[{"id":38154,"text":"Idaho State University","active":true,"usgs":false}],"preferred":false,"id":776019,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70157374,"text":"70157374 - 1983 - An interpretation of gravity and aeromagnetic surveys of the Greater Jiddah area, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2024-01-29T22:47:33.492427","indexId":"70157374","displayToPublicDate":"1983-12-30T19:30:00","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"An interpretation of gravity and aeromagnetic surveys of the Greater Jiddah area, Kingdom of Saudi Arabia","docAbstract":"<p>A gravity survey of the Jiddah area between lat 21°23' and 21°48' N., long 39°03' and 39°20' E., carried out in early 1977, covers an area of 744 km<sup>2</sup> and includes 215 stations, at an average spacing of 1.9 km. The resulting simple Bouguer gravity anomaly map shows a series of four large (7-15 mgal) gravity anomaly highs along a north-trending gravity gradient located immediately west of outcrops of Precambrian rocks. The regional Bouguer gravity anomaly field of the map area decreases eastward at an approximately constant rate of about 1.1 mgal-km-1. Several anomalies suggest northeast-trending, right-lateral strike-slip faulting throughout the area.</p><p>Interpretation of the Bouguer gravity anomaly map, combined with geologic, aeromagnetic, and paleomagnetic data, leads to an interpretive model in which the gravity gradient marks the boundary zone between Precambrian continental crust to the east and oceanic sea-floor crust overlain by marine sedimentary rocks to the west. The strike-slip faults in the area are probably the landward extension of offshore Red Sea transform faults, and, because they penetrate and offset continental crust, their study may yield useful information about the mechanism of transform faulting. The gravity anomaly highs are interpreted to result from shallow intrusive bodies, probably gabbroic in composition, that are buried a few hundred meters below the surface and that are approximately 2 km thick. </p>","language":"English","publisher":"U.S. Geological Survey, Saudi Arabian Mission","publisherLocation":"Jiddah, Saudi Arabia","usgsCitation":"Gettings, M.E., and Andreasen, G., 1983, An interpretation of gravity and aeromagnetic surveys of the Greater Jiddah area, Kingdom of Saudi Arabia, Report: iv, 37 p.; 3 Plates: 37.52 x 43.15 inches or smaller.","productDescription":"Report: iv, 37 p.; 3 Plates: 37.52 x 43.15 inches or smaller","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":308359,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/unnumbered/70157374/report-thumb.jpg"},{"id":360857,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/unnumbered/70157374/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":360856,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/unnumbered/70157374/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":360858,"rank":4,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/unnumbered/70157374/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":360859,"rank":5,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/unnumbered/70157374/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"Saudi Arabia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              39.2,\n              20.5\n            ],\n            [\n              38.7,\n              23\n            ],\n            [\n              41,\n              23\n            ],\n            [\n              41,\n              20.5\n            ],\n            [\n              39.2,\n              20.5\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","publicComments":"SA(IR) 528, Open-File Report USGS-OF-03-31","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56027bafe4b03bc34f5447e8","contributors":{"authors":[{"text":"Gettings, Mark E. 0000-0002-2910-2321 mgetting@usgs.gov","orcid":"https://orcid.org/0000-0002-2910-2321","contributorId":602,"corporation":false,"usgs":true,"family":"Gettings","given":"Mark","email":"mgetting@usgs.gov","middleInitial":"E.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":572907,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Andreasen, Gordon E.","contributorId":94272,"corporation":false,"usgs":true,"family":"Andreasen","given":"Gordon E.","affiliations":[],"preferred":false,"id":572908,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011350,"text":"70011350 - 1983 - Plutonium speciation in water from Mono Lake, California","interactions":[],"lastModifiedDate":"2025-11-25T15:22:04.609349","indexId":"70011350","displayToPublicDate":"1983-12-23T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Plutonium speciation in water from Mono Lake, California","docAbstract":"The solubility of plutonium in Mono Lake water is enhanced by the presence of large concentrations of indigenous carbonate ions and moderate concentrations of fluoride ions. In spite of the complex chemical composition of this water, only a few ions govern the behavior of plutonium, as demonstrated by the fact that it was possible to duplicate plutonium speciation in a synthetic water containing only the principal components of Mono Lake water.","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.222.4630.1323","issn":"00368075","usgsCitation":"Cleveland, J., Rees, T., and Nash, K., 1983, Plutonium speciation in water from Mono Lake, California: Science, v. 222, no. 4630, p. 1323-1325, https://doi.org/10.1126/science.222.4630.1323.","productDescription":"3 p.","startPage":"1323","endPage":"1325","costCenters":[],"links":[{"id":220973,"rank":1,"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        \"coordinates\": [\n          [\n            [\n              -119.23547883490315,\n              38.11956391803898\n            ],\n            [\n              -119.23547883490315,\n              37.894106221864334\n            ],\n            [\n              -118.82146949863339,\n              37.894106221864334\n            ],\n            [\n              -118.82146949863339,\n              38.11956391803898\n            ],\n            [\n              -119.23547883490315,\n              38.11956391803898\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"222","issue":"4630","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7c9de4b0c8380cd79aa4","contributors":{"authors":[{"text":"Cleveland, J.M.","contributorId":66734,"corporation":false,"usgs":true,"family":"Cleveland","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":360892,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rees, T.F.","contributorId":26068,"corporation":false,"usgs":true,"family":"Rees","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":360890,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nash, K.L.","contributorId":27191,"corporation":false,"usgs":true,"family":"Nash","given":"K.L.","affiliations":[],"preferred":false,"id":360891,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70207108,"text":"70207108 - 1983 - A dislocation model of strain accumulation and release at a subduction zone","interactions":[],"lastModifiedDate":"2020-06-01T12:19:07.642338","indexId":"70207108","displayToPublicDate":"1983-12-06T12:02:29","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"A dislocation model of strain accumulation and release at a subduction zone","docAbstract":"<p><span>Strain accumulation and release at a subduction zone are attributed to stick slip on the main thrust zone and steady aseismic slip on the remainder of the plate interface. This process can be described as a superposition of steady state subduction and a repetitive cycle of slip on the main thrust zone, consisting of steady normal slip at the plate convergence rate plus occasional thrust events that recover the accumulated normal slip. Because steady state subduction does not contribute to the deformation at the free surface, deformation observed there is completely equivalent to that produced by the slip cycle alone. The response to that slip is simply the response of a particular earth model to embedded dislocations. For a purely elastic earth model, the deformation cycle consists of a coseismic offset followed by a linear‐in‐time recovery to the initial value during the interval between earthquakes. For an elastic‐viscoelastic earth model (elastic lithosphere over a viscoelastic asthenosphere), the postearthquake recovery is not linear in time. Records of local uplift as a function of time indicate that the long‐term postseismic recovery is approximately linear, suggesting that elastic earth models are adequate to describe the deformation cycle. However, the deformation predicted for a simple elastic half‐space earth model does not reproduce the deformation observed along the subduction zones in Japan at all well if stick slip is restricted to the main thrust zone. As recognized earlier by Shimazaki, Seno, and Kato, the uplift profiles could be explained if stick slip were postulated to extend along the plate interface beyond the main thrust zone to a depth of perhaps 100 km, but independent evidence suggests that stick slip at such depths is unlikely.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB088iB06p04984","usgsCitation":"Savage, J.C., 1983, A dislocation model of strain accumulation and release at a subduction zone: Journal of Geophysical Research B: Solid Earth, v. 88, no. B6, p. 4984-4996, https://doi.org/10.1029/JB088iB06p04984.","productDescription":"13 p.","startPage":"4984","endPage":"4996","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":370041,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"B6","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Savage, James C. 0000-0002-5114-7673 jasavage@usgs.gov","orcid":"https://orcid.org/0000-0002-5114-7673","contributorId":2412,"corporation":false,"usgs":true,"family":"Savage","given":"James","email":"jasavage@usgs.gov","middleInitial":"C.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":776859,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70120434,"text":"70120434 - 1983 - Results of an adaptive environmental assessment modeling workshop concerning potential impacts of drilling muds and cuttings on the marine environment","interactions":[],"lastModifiedDate":"2014-08-14T13:06:41","indexId":"70120434","displayToPublicDate":"1983-09-01T13:06:02","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"seriesNumber":"NTIS PB-83-114165","title":"Results of an adaptive environmental assessment modeling workshop concerning potential impacts of drilling muds and cuttings on the marine environment","docAbstract":"<p>Drilling fluids or \"muds\" are essential components of modern drilling operations. They provide integrity for the well bore, a medium for removal of formation cuttings, and lubrication and cooling of the drill bit and pipe. The modeling workshop described in this report was conducted September 14-18, 1981 in Gulf Breeze, Florida to consider potential impacts of discharged drilling muds and cuttings on the marine environment. The broad goals of the workshop were synthesis of information on fate and effects, identification of general relationships between drilling fluids and the marine environment, and identification of site-specific variables likely to determine impacts of drilling muds and cuttings in various marine sites.</p>\n<br/>\n<p>The workshop was structured around construction of a model simulating fate and effects of discharges from a single rig into open water areas of the Gulf of Mexico, and discussion of factors that might produce different fate and effects in enclosed areas such as bays and estuaries. The simulation model was composed of four connected submodels. A Discharge/Fate submodel dealt with the discharge characteristics of the rig and the subsequent fate of discharged material. Three effects submodels then calculated biological responses at distances away from the rig for the water column, soft bottom benthos (assuming the rig was located over a soft bottom environment), and hard bottom benthos (assuming the rig was located over a hard bottom environment). The model focused on direct linkages between the discharge and various organisms rather than on how the marine ecosystem itself is interconnected.</p>\n<br/>\n<p>Behavior of the simulation model indicated relatively localized effects of drilling muds and cuttings discharged from a single platform into open water areas. Water column fate and effects were dominated by rapid dilution. Effects from deposition of spent mud and cuttings were spatially limited with relatively rapid recovery, especially in soft bottom benthic communities which were conceptualized as being adapted to frequent storms. This behavior was generated by the set of assumptions about linkages and functional relationships used to construct the model. Areas of uncertainty included methods for extrapolating 96-hr LC50 so results to exposures of varying lengths and concentrations; recovery rates of benthic communities; responses to various depths and rates of burial; fate and effects of the plume in relationship to stratification layers; and long-term and sub-lethal effects of slightly elevated concentrations of discharged materials. Evaluation of the assumptions of the Soft Bottom Submodel suggest that the assumptions used may have been relatively liberal estimates of resiliency of these communities.</p>\n<br/>\n<p>Discussion of \"closed\" water bodies such as bays and estuaries indicated several reasons to expect different and more complex fate and effects behavior in these areas. These factors included different species and communities (such as aquatic macrophytes and oyster beds), more complex circulation and stratification patterns, and potentially more active resuspension processes. Much of the possible difference in behavior in these areas centers around the extent to which they are “closed” or in the relative residence times of water and sediments in these areas as they determine the long-term dispersion of discharged material. Despite the complexity and variability of these areas, a large body of knowledge (such as that concerning fate and physical effects of dredge spoil) that could be effectively employed in analysis of potential fate and physical effects in enclosed areas was identified.</p>","language":"English","publisher":"National Technical Information Service","publisherLocation":"Springfield, VA","usgsCitation":"Auble, G.T., Andrews, A.K., Ellison, R.A., Hamilton, D.B., Johnson, R.A., Roelle, J.E., and Marmorek, D.R., 1983, Results of an adaptive environmental assessment modeling workshop concerning potential impacts of drilling muds and cuttings on the marine environment, 30 p.","productDescription":"30 p.","numberOfPages":"30","costCenters":[],"links":[{"id":292204,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53edcd4fe4b0f61b386d2457","contributors":{"authors":[{"text":"Auble, Gregor T. 0000-0002-0843-2751 aubleg@usgs.gov","orcid":"https://orcid.org/0000-0002-0843-2751","contributorId":2187,"corporation":false,"usgs":true,"family":"Auble","given":"Gregor","email":"aubleg@usgs.gov","middleInitial":"T.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":498199,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Andrews, Austin K.","contributorId":85516,"corporation":false,"usgs":true,"family":"Andrews","given":"Austin","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":498203,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ellison, Richard A.","contributorId":19087,"corporation":false,"usgs":true,"family":"Ellison","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":498201,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hamilton, David B. hamiltond@usgs.gov","contributorId":193,"corporation":false,"usgs":true,"family":"Hamilton","given":"David","email":"hamiltond@usgs.gov","middleInitial":"B.","affiliations":[],"preferred":true,"id":498198,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Johnson, Richard A.","contributorId":81420,"corporation":false,"usgs":true,"family":"Johnson","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":498202,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Roelle, James E. roelleb@usgs.gov","contributorId":2330,"corporation":false,"usgs":true,"family":"Roelle","given":"James","email":"roelleb@usgs.gov","middleInitial":"E.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":498200,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Marmorek, David R.","contributorId":108415,"corporation":false,"usgs":true,"family":"Marmorek","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":498204,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70207804,"text":"70207804 - 1983 - Opening of the Red Sea: Constraints from a palaeomagnetic study of the As Sarat volcanic field, south‐western Saudi Arabia","interactions":[],"lastModifiedDate":"2026-02-09T17:15:00.689351","indexId":"70207804","displayToPublicDate":"1983-09-01T11:44:45","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1804,"text":"Geophysical Journal of the Royal Astronomical Society","active":true,"publicationSubtype":{"id":10}},"title":"Opening of the Red Sea: Constraints from a palaeomagnetic study of the As Sarat volcanic field, south‐western Saudi Arabia","docAbstract":"<p><span>Four stratigraphic sections through alkali basalt flows of Oligocene to Miocene age (29‐24 Ma) in the As Sarat volcanic field, south‐western Saudi Arabia, were sampled for palaeomagnetic study. After systematic alternating‐field demagnetization, 42 magnetically acceptable flows (139 samples) yield a mean direction of magnetization of =355.3°, =15.2° (α=4.3°), which defines a palaeomagnetic pole at 78.8°N, 247.8°E. Of these acceptable flows, 24 are normally, and 18 reversely, magnetized. Part of one section was apparently erupted during the early phases of a polarity reversal of the Earth's field. The mean direction derived from the 24 normally magnetized flows is significantly different (after inverting 180°) from that derived from the 18 reversed flows, supporting the hypothesis of a displaced dipole source for the Earth's field in late Oligocene to early Miocene time. A comparison of the results from As Sarat with palaeomagnetic results from upper Tertiary rocks in Africa indicates that the Red Sea has opened 12° (estimated ±8° at the 95 per cent confidence level). These results indicate that most of the counter‐clockwise rotation of Arabia relative to Africa occurred since the eruption of the As Sarat volcanics, in disagreement with proposed models for main‐stage Red Sea spreading from late Eocene to early Oligocene time. The palaeomagnetic results also indicate that the Arabian Peninsula was more equatorial in late Oligocene to early Miocene time than it is now, by an amount compatible with the opening of the Gulf of Aden</span></p>","language":"English","publisher":"Oxford Academic","usgsCitation":"Kellogg, K.S., and Reynolds, R.L., 1983, Opening of the Red Sea: Constraints from a palaeomagnetic study of the As Sarat volcanic field, south‐western Saudi Arabia: Geophysical Journal of the Royal Astronomical Society, v. 74, no. 3, p. 649-665.","productDescription":"17 p.","startPage":"649","endPage":"665","costCenters":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"links":[{"id":499681,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://academic.oup.com/gji/article/74/3/649/577855","linkFileType":{"id":5,"text":"html"}},{"id":371216,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Saudi Arabia","otherGeospatial":"As Sarat volcanic field","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              42.9345703125,\n              17.5602465032949\n            ],\n            [\n              45.703125,\n              17.5602465032949\n            ],\n            [\n              45.703125,\n              19.145168196205297\n            ],\n            [\n              42.9345703125,\n              19.145168196205297\n            ],\n            [\n              42.9345703125,\n              17.5602465032949\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"74","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Kellogg, Karl S. 0000-0002-6536-9066 kkellogg@usgs.gov","orcid":"https://orcid.org/0000-0002-6536-9066","contributorId":1206,"corporation":false,"usgs":true,"family":"Kellogg","given":"Karl","email":"kkellogg@usgs.gov","middleInitial":"S.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":779383,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reynolds, R. L. 0000-0002-4572-2942","orcid":"https://orcid.org/0000-0002-4572-2942","contributorId":79885,"corporation":false,"usgs":true,"family":"Reynolds","given":"R.","middleInitial":"L.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":779392,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70204617,"text":"70204617 - 1983 - Seedling establishment on a landslide site","interactions":[],"lastModifiedDate":"2019-08-06T12:22:26","indexId":"70204617","displayToPublicDate":"1983-08-06T12:02:24","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1195,"text":"Castanea","active":true,"publicationSubtype":{"id":10}},"title":"Seedling establishment on a landslide site","docAbstract":"<p>Two landslide scars (slide tracks) were plot sampled one and two years after landsliding to determine plant species involved in ecesis. The study site is located in a blockfield cove on Massanutten Mountain, northern Virginia. Old growth forest, adjacent to the slide tracks, is composed primarily of hemlock (Tsuga canadensis) and sweet birch (Betula lenta). These species are the first and foremost colonizers on the slide tracks. Dendrochronological analysis shows that landsliding is frequent at the study site and this disturbance may impart non-equilibrium conditions on the forest. Seed bed characteristics, light availability, and mode of dispersal may be important factors in plant ecesis on slide tracks</p>","language":"English","publisher":"Southern Appalachian Botanical Society","usgsCitation":"Hupp, C.R., 1983, Seedling establishment on a landslide site: Castanea, v. 48, no. 2, p. 89-98.","productDescription":"10 p.","startPage":"89","endPage":"98","costCenters":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"links":[{"id":366309,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":366302,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://www.jstor.org/stable/4033072"}],"country":"United States","state":"Virginia","otherGeospatial":" Massanutten Mountain","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -78.79394531249999,\n              38.35027253825765\n            ],\n            [\n              -78.5302734375,\n              38.35027253825765\n            ],\n            [\n              -78.5302734375,\n              38.62545397209084\n            ],\n            [\n              -78.79394531249999,\n              38.62545397209084\n            ],\n            [\n              -78.79394531249999,\n              38.35027253825765\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"48","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Hupp, Cliff R. 0000-0003-1853-9197 crhupp@usgs.gov","orcid":"https://orcid.org/0000-0003-1853-9197","contributorId":2344,"corporation":false,"usgs":true,"family":"Hupp","given":"Cliff","email":"crhupp@usgs.gov","middleInitial":"R.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":767786,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011263,"text":"70011263 - 1983 - Ages estimated from a diffusion equation model for scarp degradation","interactions":[],"lastModifiedDate":"2025-12-08T17:05:12.359958","indexId":"70011263","displayToPublicDate":"1983-07-15T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Ages estimated from a diffusion equation model for scarp degradation","docAbstract":"The diffusion equation derived from the continuity equation for hillslopes is applied to scarp erosion in unconsolidated materials. Solutions to this equation allow direct calculation of the product of the rate coefficient and the age of the scarp from measurements of scarp morphology. Where the rate coefficient can be estimated or can be derived from scarps of known age, this method allows direct calculation of unknown ages of scarps.","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.221.4607.263","issn":"00368075","usgsCitation":"Colman, S.M., and Watson, K., 1983, Ages estimated from a diffusion equation model for scarp degradation: Science, v. 221, no. 4607, p. 263-265, https://doi.org/10.1126/science.221.4607.263.","productDescription":"3 p.","startPage":"263","endPage":"265","costCenters":[],"links":[{"id":220761,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"221","issue":"4607","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e903e4b0c8380cd48039","contributors":{"authors":[{"text":"Colman, Steven M. 0000-0002-0564-9576","orcid":"https://orcid.org/0000-0002-0564-9576","contributorId":77482,"corporation":false,"usgs":true,"family":"Colman","given":"Steven","email":"","middleInitial":"M.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":360692,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Watson, Ken","contributorId":90317,"corporation":false,"usgs":true,"family":"Watson","given":"Ken","email":"","affiliations":[],"preferred":false,"id":360693,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011628,"text":"70011628 - 1983 - Effective record length for the T-year event","interactions":[],"lastModifiedDate":"2025-04-11T17:01:03.570727","indexId":"70011628","displayToPublicDate":"1983-07-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Effective record length for the T-year event","docAbstract":"<p><span>The effect of serial dependence on the reliability of an estimate of the&nbsp;</span><i>T</i><span>-yr. event is of importance in hydrology because design decisions are based upon the estimate. In this paper the reliability of estimates of the&nbsp;</span><i>T</i><span>-yr. event from two common distributions is given as a function of number of observations and lag-one serial correlation coefficient for&nbsp;</span><i>T</i><span>&nbsp;= 2, 10, 20, 50, and 100 yr. A lag-one autoregressive model is assumed with either a normal or Pearson Type-III disturbance term. Results indicate that, if observations are serially correlated, the effective record length should be used to estimate the discharge associated with the expected exceedance probability.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0022-1694(83)90059-8","issn":"00221694","usgsCitation":"Tasker, G.D., 1983, Effective record length for the T-year event: Journal of Hydrology, v. 64, no. 1-4, p. 39-47, https://doi.org/10.1016/0022-1694(83)90059-8.","productDescription":"9 p.","startPage":"39","endPage":"47","costCenters":[],"links":[{"id":221125,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"64","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0634e4b0c8380cd51156","contributors":{"authors":[{"text":"Tasker, Gary D.","contributorId":83097,"corporation":false,"usgs":true,"family":"Tasker","given":"Gary","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":361574,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011208,"text":"70011208 - 1983 - Early Tertiary age of pitchstone in the northern Black Hills, South Dakota","interactions":[],"lastModifiedDate":"2025-12-09T16:43:31.599618","indexId":"70011208","displayToPublicDate":"1983-06-10T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Early Tertiary age of pitchstone in the northern Black Hills, South Dakota","docAbstract":"<p><span>A block of pitchstone in the northern Black Hills, South Dakota, is Paleocene in age, according to potassium-argon dating of biotite and fission-track dating of zircon in the sample. These data invalidate published suggestions that the age is much younger. The pitchstone is not extrusive in its present position but instead is in a volcanic pipe with other fragments that came downward from as much as 1100 meters above the modern surface.</span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.220.4602.1153","issn":"00368075","usgsCitation":"Redden, J., Obradovich, J.D., Naeser, C.W., Zartman, R., and Norton, J., 1983, Early Tertiary age of pitchstone in the northern Black Hills, South Dakota: Science, v. 220, no. 4602, p. 1153-1154, https://doi.org/10.1126/science.220.4602.1153.","productDescription":"2 p.","startPage":"1153","endPage":"1154","costCenters":[],"links":[{"id":221739,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"South Dakota","otherGeospatial":"northern Black Hills","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-104.054487,44.180381],[-104.055914,44.874986],[-104.057698,44.997431],[-104.039681,44.998041],[-104.040114,45.374214],[-104.045443,45.94531],[-100.430597,45.943638],[-99.005754,45.939944],[-98.414518,45.936504],[-96.56328,45.935238],[-96.564002,45.91956],[-96.56703,45.915682],[-96.56442,45.909415],[-96.568315,45.902902],[-96.568772,45.888072],[-96.571354,45.886673],[-96.571871,45.871846],[-96.574667,45.866816],[-96.572984,45.861602],[-96.574517,45.843098],[-96.583085,45.820024],[-96.596704,45.811801],[-96.612512,45.794442],[-96.627778,45.786239],[-96.638726,45.770171],[-96.641941,45.759871],[-96.652226,45.746809],[-96.662595,45.738682],[-96.672665,45.732336],[-96.711157,45.717561],[-96.745086,45.701576],[-96.75035,45.698782],[-96.760866,45.687518],[-96.835769,45.649648],[-96.844211,45.639583],[-96.852392,45.61484],[-96.857751,45.605962],[-96.801987,45.555414],[-96.79384,45.550724],[-96.76528,45.521414],[-96.745487,45.488712],[-96.743486,45.480649],[-96.738446,45.473499],[-96.732739,45.458737],[-96.692541,45.417338],[-96.680454,45.410499],[-96.617726,45.408092],[-96.60118,45.403181],[-96.562142,45.38609],[-96.521787,45.375645],[-96.489065,45.357071],[-96.469246,45.324941],[-96.468027,45.318619],[-96.46191,45.313884],[-96.453067,45.298115],[-96.451232,44.718375],[-96.453049,43.500415],[-96.598928,43.500457],[-96.599182,43.496011],[-96.586274,43.491099],[-96.580997,43.481384],[-96.586364,43.478251],[-96.584603,43.46961],[-96.587929,43.464878],[-96.600039,43.45708],[-96.60286,43.450907],[-96.594254,43.434153],[-96.587884,43.431685],[-96.575181,43.431756],[-96.570224,43.428601],[-96.573579,43.419228],[-96.562728,43.412782],[-96.557586,43.406792],[-96.537116,43.395063],[-96.531159,43.39561],[-96.529152,43.397735],[-96.525453,43.396317],[-96.521572,43.38564],[-96.521323,43.374607],[-96.526467,43.368314],[-96.527223,43.362257],[-96.526635,43.351833],[-96.524289,43.347214],[-96.534913,43.336473],[-96.528817,43.316561],[-96.525564,43.312467],[-96.530392,43.300034],[-96.553087,43.29286],[-96.555246,43.294803],[-96.56911,43.295535],[-96.573556,43.29917],[-96.581052,43.297118],[-96.579094,43.293797],[-96.577588,43.2788],[-96.580904,43.2748],[-96.582876,43.274594],[-96.582939,43.276536],[-96.586317,43.274319],[-96.58522,43.268878],[-96.576804,43.268308],[-96.564165,43.260239],[-96.554968,43.259998],[-96.552591,43.257769],[-96.552963,43.247281],[-96.565253,43.244241],[-96.571194,43.238961],[-96.568505,43.231554],[-96.56044,43.224219],[-96.554937,43.226775],[-96.540088,43.225698],[-96.535741,43.22764],[-96.526865,43.224071],[-96.519273,43.21769],[-96.500759,43.220767],[-96.496454,43.223652],[-96.485264,43.224183],[-96.476697,43.222014],[-96.470626,43.207225],[-96.473777,43.198766],[-96.473834,43.189804],[-96.472395,43.185644],[-96.465146,43.182971],[-96.467292,43.164066],[-96.466537,43.150281],[-96.459978,43.143516],[-96.450361,43.142237],[-96.443431,43.133825],[-96.440801,43.123129],[-96.436589,43.120842],[-96.439335,43.113916],[-96.462855,43.091419],[-96.462636,43.089614],[-96.455337,43.088129],[-96.454088,43.084197],[-96.455209,43.075053],[-96.46085,43.064033],[-96.468207,43.06186],[-96.473165,43.06355],[-96.476905,43.062383],[-96.490365,43.050789],[-96.501748,43.048632],[-96.510256,43.049917],[-96.518431,43.042068],[-96.509145,43.037297],[-96.512916,43.029962],[-96.510995,43.024701],[-96.499187,43.019213],[-96.49167,43.009707],[-96.496699,42.998807],[-96.509986,42.995126],[-96.512886,42.991424],[-96.512237,42.985937],[-96.516724,42.981458],[-96.520773,42.980385],[-96.515922,42.972886],[-96.506148,42.971348],[-96.503132,42.968192],[-96.500308,42.959391],[-96.504857,42.954659],[-96.509472,42.945151],[-96.519994,42.93976],[-96.516419,42.935438],[-96.516888,42.932512],[-96.525536,42.935511],[-96.541689,42.922576],[-96.536564,42.905656],[-96.542847,42.903737],[-96.539397,42.899964],[-96.536007,42.900901],[-96.528886,42.89795],[-96.526357,42.891852],[-96.540116,42.889678],[-96.537851,42.878475],[-96.546394,42.874464],[-96.549659,42.870281],[-96.550469,42.863742],[-96.546556,42.857273],[-96.541708,42.858871],[-96.545502,42.849956],[-96.554709,42.846142],[-96.554203,42.843648],[-96.549976,42.840705],[-96.551285,42.836606],[-96.556162,42.836675],[-96.560572,42.839373],[-96.56284,42.836309],[-96.563058,42.831051],[-96.565605,42.830434],[-96.571353,42.837155],[-96.581604,42.837521],[-96.58238,42.833657],[-96.577813,42.828719],[-96.585699,42.818041],[-96.596008,42.815044],[-96.595664,42.810426],[-96.590913,42.808987],[-96.595283,42.792982],[-96.602575,42.787767],[-96.603784,42.78372],[-96.61949,42.784034],[-96.626406,42.773518],[-96.632142,42.770863],[-96.632212,42.761512],[-96.628741,42.757532],[-96.621235,42.758084],[-96.619494,42.754792],[-96.630485,42.750378],[-96.639704,42.737071],[-96.631931,42.725086],[-96.624704,42.725497],[-96.624446,42.714294],[-96.630617,42.70588],[-96.61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Dakota\",\"nation\":\"USA  \"}}]}","volume":"220","issue":"4602","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0491e4b0c8380cd50a6f","contributors":{"authors":[{"text":"Redden, J. A.","contributorId":62215,"corporation":false,"usgs":true,"family":"Redden","given":"J. A.","affiliations":[],"preferred":false,"id":360563,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Obradovich, J. D.","contributorId":48966,"corporation":false,"usgs":true,"family":"Obradovich","given":"J.","middleInitial":"D.","affiliations":[],"preferred":false,"id":360562,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Naeser, C. W.","contributorId":17582,"corporation":false,"usgs":true,"family":"Naeser","given":"C.","middleInitial":"W.","affiliations":[],"preferred":false,"id":360560,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zartman, R. E.","contributorId":15632,"corporation":false,"usgs":true,"family":"Zartman","given":"R. E.","affiliations":[],"preferred":false,"id":360559,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Norton, J.J.","contributorId":25573,"corporation":false,"usgs":true,"family":"Norton","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":360561,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70011430,"text":"70011430 - 1983 - Solubility of crude oil in methane as a function of pressure and temperature","interactions":[],"lastModifiedDate":"2025-03-19T15:38:03.132946","indexId":"70011430","displayToPublicDate":"1983-06-03T00:00:00","publicationYear":"1983","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":"Solubility of crude oil in methane as a function of pressure and temperature","docAbstract":"<p><span>The solubility of a 44° API (0.806 sp. gr.) whole crude oil has been measured in methane with water present at temperatures of 50 to 250°C and pressures of 740 to 14,852 psi, as have the solubilities of two high molecular weight petroleum distillation fractions at temperatures of 50 to 250°C and pressures of 4482 to 25,266 psi. Both increases in pressure and temperature increase the solubility of crude oil and petroleum distillation fractions in methane, the effect of pressure being greater than that of temperature. Unexpectedly high solubility levels (0.5–1.5 grams of oil per liter of methane—at laboratory temperature and pressure) were measured at moderate conditions (50–200°C and 5076–14504 psi). Similar results were found for the petroleum distillation fractions, one of which was the highest molecular weight material of petroleum (material boiling above 266°C at 6 microns pressure). Unexpectedly mild conditions (100°C and 15,200 psi; 200°C and 7513 psi) resulted in cosolubility of crude oil and methane. Under these conditions, samples of the gas-rich phase gave solubility values of 4 to 5 g/l, or greater.</span></p><p><span>Qualitative analyses of the crude-oil solute samples showed that at low pressure and temperature equilibration conditions, the solute condensate would be enriched in C<sub>5</sub>–C<sub>15</sub>&nbsp;range hydrocarbons and in saturated hydrocarbons in the C<sub>15+</sub>&nbsp;fraction. With increases in temperature and especially pressure, these tendencies were reversed, and the solute condensate became identical to the starting crude oil.</span></p><p><span>The data of this study, compared to that of previous studies, shows that methane, with water present, has a much greater carrying capacity for crude oil than in dry systems. The presence of water also drastically lowers the temperature and pressure conditions required for cosolubility.</span></p><p><span>The data of this and/or previous studies demonstrate that the addition of carbon dioxide, ethane, propane, or butane to methane also has a strong positive effect on crude oil solubility, as does the presence of fine grained rocks.</span></p><p><span>The&nbsp;<i>n</i>-paraffin distributions (as well as the overall composition) of the solute condensates are controlled by the temperature and pressure of solution and exsolution, as well as by the composition of the original starting material. It appears quite possible that primary migration by gaseous solution could ‘strip’ a source rock of crude-oil like components leaving behind a bitumen totally unlike the migrated crude oil. The data of this study demonstrate previous criticisms of primary petroleum migration by gas solution are invalid; that primary migration by gaseous solution cannot occur because methane cannot dissolve sufficient volumes of crude oil or cannot dissolve the highest molecular weight components of petroleum (tars and asphaltenes).</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0146-6380(83)90042-6","usgsCitation":"Price, L.C., Wenger, L., Ging, T., and Blount, C., 1983, Solubility of crude oil in methane as a function of pressure and temperature: Organic Geochemistry, v. 4, no. 3-4, p. 201-221, https://doi.org/10.1016/0146-6380(83)90042-6.","productDescription":"21 p.","startPage":"201","endPage":"221","costCenters":[],"links":[{"id":221171,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado, Nebraska, 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C.W.","contributorId":63944,"corporation":false,"usgs":true,"family":"Blount","given":"C.W.","email":"","affiliations":[],"preferred":false,"id":361085,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70210234,"text":"70210234 - 1983 - Deep structure of northern Mississippi embayment","interactions":[],"lastModifiedDate":"2020-05-22T12:42:35.412535","indexId":"70210234","displayToPublicDate":"1983-05-22T07:30:19","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":605,"text":"AAPG Bulletin","printIssn":"0149-1423","active":true,"publicationSubtype":{"id":10}},"title":"Deep structure of northern Mississippi embayment","docAbstract":"<p>In September 1980, the U. S. Geological Survey conducted a seismic refraction investigation of the northern Mississippi Embayment. During the investigation, 34 shots from nine shotpoints were recorded along a series of profiles. The profiles were parallel to and across an inferred Precambrian rift zone which is outlined by a series of magnetic anomalies and covers an area at least 200 km (125 mi) long and 70 km (45 mi) wide. The paper presents an interpretation of the survey results. The tectonic model proposed to explain the origin of the embayment velocity structure includes a late Precambrian mantle plume that intruded the lower crust of the northern embayment, causing uplift (and/or crustal stretching) and subsequent rifting of the axial area. This was followed by erosion, subsidence, and subsequent deposition of sediments in the resulting trough.&nbsp;</p>","language":"English","publisher":"AAPG","doi":"10.1306/AD4608BE-16F7-11D7-8645000102C1865D","usgsCitation":"Ginzburg, A., Mooney, W.D., Walter, A., Lutter, W.J., and Healy, J.H., 1983, Deep structure of northern Mississippi embayment: AAPG Bulletin, v. 67, no. 11, p. 2031-2046, https://doi.org/10.1306/AD4608BE-16F7-11D7-8645000102C1865D.","productDescription":"16 p.","startPage":"2031","endPage":"2046","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":375011,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Northern Mississippi embayment","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -92.92236328125,\n              37.055177106660814\n            ],\n            [\n              -88.43994140625,\n              37.055177106660814\n            ],\n            [\n              -88.43994140625,\n              44.402391829093915\n            ],\n            [\n              -92.92236328125,\n              44.402391829093915\n            ],\n            [\n              -92.92236328125,\n              37.055177106660814\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"67","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Ginzburg, A.","contributorId":78472,"corporation":false,"usgs":true,"family":"Ginzburg","given":"A.","email":"","affiliations":[],"preferred":false,"id":789694,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":789695,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Walter, A.W.","contributorId":75554,"corporation":false,"usgs":true,"family":"Walter","given":"A.W.","email":"","affiliations":[],"preferred":false,"id":789696,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lutter, W. J.","contributorId":90361,"corporation":false,"usgs":true,"family":"Lutter","given":"W.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":789697,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Healy, J. H.","contributorId":48968,"corporation":false,"usgs":true,"family":"Healy","given":"J.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":789698,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70210050,"text":"70210050 - 1983 - Distribution and origin of sulfur in Colorado oil shale","interactions":[],"lastModifiedDate":"2020-05-12T17:08:31.859007","indexId":"70210050","displayToPublicDate":"1983-05-12T11:50:41","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Distribution and origin of sulfur in Colorado oil shale","docAbstract":"<p>The sulfur content of 1,225 samples of Green River oil shale from two core holes in the Piceance Creek Basin, Colorado, ranges from nearly 0 to 4.9 weight percent. In one core hole, the average sulfur content of a sequence of oil shale 555 m thick, which represents nearly the maximum thickness of oil shale in the basin, is 0.76 weight percent. The vertical distribution of sulfur through the oil shale is cyclic. As many as 25 sulfur cycles have lateral continuity and can be traced between the core holes. Most of the sulfur resides in iron sulfides (pyrite, marcasite, and minor? pyrrhotite), and small amounts are organically bound in kerogen. In general, the concentration of sulfur correlates moderately with shale-oil yield, but the degree of association ranges from quite high in the upper 90 m of the oil -shale sequence to low or none in the leached zone and in illitic oil shale in the lower part of the sequence. Sulfur also correlates moderately with iron in the carbonate oil -shale sequence, but no correlation was found in the illitic samples. Sulfide mineralization is believed to have occurred during early and late stages of diagenesis, and after lithification, during development of the leached zone. Significant amounts of iron found in ankeritic dolomite and in illite probably account for the lack of a strong correlation between sulfur and iron.</p>","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkTitle":"Oil Shale Symposium Proceedings","largerWorkSubtype":{"id":19,"text":"Conference Paper"},"conferenceTitle":"16th oil shale symposium proceedings ","conferenceDate":"April 13-15, 1983","conferenceLocation":"Golden, Colorado","language":"English","publisher":"Colorado School of Mines","usgsCitation":"Dyni, J.R., 1983, Distribution and origin of sulfur in Colorado oil shale, <i>in</i> Oil Shale Symposium Proceedings, Golden, Colorado, April 13-15, 1983, p. 144-159.","productDescription":"16 p.","startPage":"144","endPage":"159","costCenters":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"links":[{"id":374676,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Piceance Creek Basin ","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -108.8690185546875,\n              40.03182061333687\n            ],\n            [\n              -107.60009765625,\n              40.03182061333687\n            ],\n            [\n              -107.60009765625,\n              40.643135583312805\n            ],\n            [\n              -108.8690185546875,\n              40.643135583312805\n            ],\n            [\n              -108.8690185546875,\n              40.03182061333687\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Dyni, John R. jdyni@usgs.gov","contributorId":756,"corporation":false,"usgs":true,"family":"Dyni","given":"John","email":"jdyni@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":true,"id":788922,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70231352,"text":"70231352 - 1983 - Digital spatial data handling techniques applied to the development of quantitative geologic models","interactions":[],"lastModifiedDate":"2022-05-06T16:50:42.662409","indexId":"70231352","displayToPublicDate":"1983-05-01T11:43:30","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Digital spatial data handling techniques applied to the development of quantitative geologic models","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the 17th International Symposium on Remote Sensing of Environment","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"17th International Symposium on Remote Sensing of Environment","conferenceDate":"May 9-13, 1983","conferenceLocation":"Ann Arbor, Michigan, United States","language":"English","publisher":"University of Michigan","usgsCitation":"Walker, K., 1983, Digital spatial data handling techniques applied to the development of quantitative geologic models, <i>in</i> Proceedings of the 17th International Symposium on Remote Sensing of Environment, v. 2, Ann Arbor, Michigan, United States, May 9-13, 1983, p. 827-838.","productDescription":"12 p.","startPage":"827","endPage":"838","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":400296,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":400295,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://symposia.org/past_symposia.htm"}],"volume":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Walker, K.-M.","contributorId":87957,"corporation":false,"usgs":true,"family":"Walker","given":"K.-M.","email":"","affiliations":[],"preferred":false,"id":842363,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70209773,"text":"70209773 - 1983 - Magnetic models of crystalline terrane; accounting for the effect of topography","interactions":[],"lastModifiedDate":"2020-04-24T19:58:32.497566","indexId":"70209773","displayToPublicDate":"1983-04-24T14:52:54","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1808,"text":"Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Magnetic models of crystalline terrane; accounting for the effect of topography","docAbstract":"<p><span>Igneous rocks commonly have large magnetic susceptibilities so that high topographic relief in crystalline terrane can produce significant anomalies in aeromagnetic surveys. Topographic anomalies are particularly significant in relatively undeformed volcanic terrane because young volcanic rocks generally have large natural remanent magnetizations as well as large susceptibilities. These anomalies commonly appear in aeromagnetic surveys as a complex pattern of high-amplitude, short-wavelength magnetic features that tend to obscure anomalies caused by deeper geologic sources. We have facilitated geologic interpretation of an aeromagnetic survey of the Oregon Cascade Range by calculating the magnetic field caused by a three-dimensional (3-D) topographic model. Maps of the calculated field are compared with observed aeromagnetic data both visually and with a numerical technique that produces a contour map of correlation coefficients for the model. These comparisons allow quick recognition of anomalies caused by normally or reversely magnetized topographic features and, more importantly, identification of anomalies caused by geologic features not obviously caused by the topography.</span></p>","language":"English","publisher":"GeoScienceWorld","doi":"10.1190/1.1441437","usgsCitation":"Blakely, R.J., and Grauch, V.J., 1983, Magnetic models of crystalline terrane; accounting for the effect of topography: Geophysics, v. 48, no. 11, p. 1551-1557, https://doi.org/10.1190/1.1441437.","productDescription":"7 p.","startPage":"1551","endPage":"1557","costCenters":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374272,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oergon","otherGeospatial":"Oregon Cascade Range","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.03613281249999,\n              42.147114459220994\n            ],\n            [\n              -121.17919921875001,\n              42.147114459220994\n            ],\n            [\n              -121.17919921875001,\n              43.11702412135048\n            ],\n            [\n              -122.03613281249999,\n              43.11702412135048\n            ],\n            [\n              -122.03613281249999,\n              42.147114459220994\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"48","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Blakely, Richard J. 0000-0003-1701-5236 blakely@usgs.gov","orcid":"https://orcid.org/0000-0003-1701-5236","contributorId":1540,"corporation":false,"usgs":true,"family":"Blakely","given":"Richard","email":"blakely@usgs.gov","middleInitial":"J.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true},{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":787954,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grauch, V. J. 0000-0002-0761-3489 tien@usgs.gov","orcid":"https://orcid.org/0000-0002-0761-3489","contributorId":152256,"corporation":false,"usgs":true,"family":"Grauch","given":"V.","email":"tien@usgs.gov","middleInitial":"J.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":787955,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70120442,"text":"70120442 - 1983 - A draft habitat suitability index (HSI) model for gray partridge","interactions":[],"lastModifiedDate":"2014-08-14T13:59:53","indexId":"70120442","displayToPublicDate":"1983-03-28T13:57:43","publicationYear":"1983","noYear":false,"publicationType":{"id":4,"text":"Book"},"publicationSubtype":{"id":12,"text":"Conference publication"},"title":"A draft habitat suitability index (HSI) model for gray partridge","docAbstract":"No abstract available.","largerWorkTitle":"Gray partridge and ring-necked pheasant workshop","conferenceTitle":"Gray partridge and ring-necked pheasant workshop","conferenceDate":"1983-03-28T00:00:00","conferenceLocation":"Campbellsport, WI","language":"English","publisher":"Wisconsin Department of Natural Resources","publisherLocation":"Madison, WI","usgsCitation":"Allen, A., and Sousa, P., 1983, A draft habitat suitability index (HSI) model for gray partridge, 1 p.","productDescription":"1 p.","numberOfPages":"1","costCenters":[],"links":[{"id":292214,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53edcd40e4b0f61b386d2394","contributors":{"authors":[{"text":"Allen, A.W.","contributorId":78282,"corporation":false,"usgs":true,"family":"Allen","given":"A.W.","email":"","affiliations":[],"preferred":false,"id":498213,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sousa, P.J.","contributorId":106809,"corporation":false,"usgs":true,"family":"Sousa","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":498214,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70120412,"text":"70120412 - 1983 - Platte River Forum for the Future: workshop model documentation","interactions":[],"lastModifiedDate":"2014-08-14T11:13:29","indexId":"70120412","displayToPublicDate":"1983-03-01T11:12:11","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"Platte River Forum for the Future: workshop model documentation","docAbstract":"<p>The Platte River Forum for the Future (PRFF) is an effort by the Nebraska Natural Resources Commission (NNRC) to bring together representatives of interests and agencies concerned with management of the Platte River and, assisted by various computer technologies, to reach some degree of agreement on the “best uses” of the remaining waters of the Platte. Simulation modeling is being used in this effort as a focal point for developing a common understanding of the behavior of the Platte River system, synthesizing existing information, identifying additional needed information, and analyzing the potential consequences of various management alternatives.</p>\n<br/>\n<p>The NNRC initiated the project in August 1982 by convening a workshop for interested parties in Grand Island, Nebraska. This workshop was devoted to construction of a preliminary simulation model describing the Platte River system. A group of facilitators/modelers from the U.S. Fish and Wildlife Service (FWS) assisted participants in translating their understanding of the Platte River into the framework of the model. In October 1982, FWS personnel began a process of training several people from Nebraska in the use of the model. At that time, minor revisions and corrections were made in the model and various development scenarios were prepared for discussion with participants at a second workshop, which was held in early November 1982.</p>\n<br/>\n<p>The purpose of this report is to document the status of the PRFF simulation model as of the end of the November 1982 meeting. We emphasize that the intent is not to describe a final product. Except for minor revisions and correction of obvious errors, the model described herein is that which existed at the end of the August workshop. The model contains the foundation for a comprehensive aid to decisionmakers, but at this time it is preliminary in nature, needing refinement and verification before it can be truly useful in analyzing management alternatives. The purpose of this report is to provide a solid foundation for that important future work.</p>\n<br/>\n<p>The report is divided into three basic parts. The first is a brief overview of the various components of the model and how they fit together. It is intended for those who are not particularly interested in the details of model formulation. The second is a detailed discussion of the logic, assumptions, equations, and data used in constructing the model. This detailed description is also referenced to specific sections of the third part, which is a set of appendices containing listings of the computer code as it presently exists.</p>","language":"English","publisher":"U.S. Fish and Wildlife Service, Western Energy and Land Use Team","publisherLocation":"Fort Collins, CO","usgsCitation":"U.S. Fish and Wildlife Service, Western Energy and Land Use Team, 1983, Platte River Forum for the Future: workshop model documentation, 251 p.","productDescription":"251 p.","numberOfPages":"251","costCenters":[],"links":[{"id":292184,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nebraska","otherGeospatial":"Platte River","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -100.6762,40.6541 ], [ -100.6762,41.4623 ], [ -95.8807,41.4623 ], [ -95.8807,40.6541 ], [ -100.6762,40.6541 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53edcd4ee4b0f61b386d243d"}
,{"id":70120405,"text":"70120405 - 1983 - Evaluating environmental and economic consequences of alternative pest management strategies: results of modeling workshops","interactions":[],"lastModifiedDate":"2014-08-14T10:47:29","indexId":"70120405","displayToPublicDate":"1983-03-01T10:32:03","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"Evaluating environmental and economic consequences of alternative pest management strategies: results of modeling workshops","docAbstract":"<p>The U.S. Environmental Protection Agency (EPA) needs a comprehensive method to evaluate the human health and environmental effects of alternative agricultural pest management strategies.  This project explored the utility of Adaptive Environmental Assessment (AEA) techniques for meeting this need.  The project objectives were to produce models for environmental impact analysis, improve communications, identify research needs and data requirements, and demonstrate a process for resolving conflicts.  The project was structured around the construction (in an initial 2 1/2-day workshop) and examination (in a second 2 1/2-day workshop) of a simulation model of a corn agroecosystem.</p>\n<br/.\n<p>The model conceptualized at the first workshop simulates the effect of corn agrecosystem decisions on crop production, economic returns, and environmental indicators.  The model is composed of five interacting submodels: 1) a Production Strategies submodel which makes decisions concerning tillage, planting, fertilizer and pesticide applications, and harvest; 2) a Hydrology/Chemical Transport submodel which represents soil hydrology, erosion, and concentrations of fertilizers and pesticides in the soil, runoff, surface waters, and percolation; 3) a Vegetation submodel which simulates growth of agricultural crops (corns and soybeans) and weeds; 4) a Pests submodel which calculates pest population levels and resulting crop damage; and 5) an Environmental Effects submodel which calculates indicators of potential fish kills, human health effects, and wildlife habitat.  The most persistent data gaps encountered in quantifying the model were coefficients to relate environmental consequences to alternative pest management strategies.</p>\n<br/>\n<p>While the model developed in the project is not yet accurate enough to be used for real-world decisions about the use of pesticides on corn, it does contain the basic structure upon which such a model could be built.  More importantly at this stage of development, the project has shown that very complex systems can be modeled in short periods of time and that the process of building such models increases understanding among disciplinary specialists and between diverse institutional interests.  This process can be useful to EPA as the agency cooperates with other institutions to meet its responsibilities in less costly ways.</p>\n<br/>\n<p>Activities at the second 2 1/2-day workshop included a review of the model, incorporation of necessary corrections, simulation of policy scenarios, and examination of techniques to address remaining institutional conflicts.  Participants were divided into three groups representing environmental, production or industry, and regulatory interests.  Each group developed scenarios that would be most appealing to their particular interest and the scenarios were simulated by the agroecosystem computer model.  Negotiators from each of the interest groups decided whether a hypothetical herbicide should be relabeled and if certain restrictions should be imposed on its use.  Other participants functioned as experts and consultants on caucus teams.  A solution to the hypothetical problem was successfully negotiated.</p>\n<br/>\n<p>Workshop participants and project staff agreed that the model and processes developed during the project should be used in training students, extension specialists, farmers, researchers, and chemical producers in collaborative problem solving methods.  More productive research can be planned, and more realistic models of complex systems can be built in this way.  More importantly, greater trust of decisionmakers in computer models, better understanding by technical experts about disciplines other than their own, and improved cooperation between institutional interests can be achieved.  This trust, understanding, and cooperation are critical ingredients in solving problems that are too complex to be resolved by independent disciplinary activity and unilateral decision authority.</p>","language":"English","publisher":"U.S. Fish and Wildlife Service, Western Energy and Land Use Team","publisherLocation":"Fort Collins, CO","usgsCitation":"Johnson, R.L., Andrews, A.K., Auble, G.T., Ellison, R.A., Hamilton, D.B., Roelle, J.E., and McNamee, P.J., 1983, Evaluating environmental and economic consequences of alternative pest management strategies: results of modeling workshops, 38 p.","productDescription":"38 p.","numberOfPages":"38","costCenters":[],"links":[{"id":292177,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53edcd4ae4b0f61b386d23e5","contributors":{"authors":[{"text":"Johnson, Richard L.","contributorId":32626,"corporation":false,"usgs":true,"family":"Johnson","given":"Richard","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":498160,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Andrews, Austin K.","contributorId":85516,"corporation":false,"usgs":true,"family":"Andrews","given":"Austin","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":498162,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Auble, Gregor T.L.","contributorId":43681,"corporation":false,"usgs":true,"family":"Auble","given":"Gregor","email":"","middleInitial":"T.L.","affiliations":[],"preferred":false,"id":498161,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ellison, Richard A.","contributorId":19087,"corporation":false,"usgs":true,"family":"Ellison","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":498159,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hamilton, David B. hamiltond@usgs.gov","contributorId":193,"corporation":false,"usgs":true,"family":"Hamilton","given":"David","email":"hamiltond@usgs.gov","middleInitial":"B.","affiliations":[],"preferred":true,"id":498156,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Roelle, James E. roelleb@usgs.gov","contributorId":2330,"corporation":false,"usgs":true,"family":"Roelle","given":"James","email":"roelleb@usgs.gov","middleInitial":"E.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":498157,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"McNamee, Peter J.","contributorId":16760,"corporation":false,"usgs":true,"family":"McNamee","given":"Peter","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":498158,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70120432,"text":"70120432 - 1983 - Wildlife guilds in Arizona desert habitats","interactions":[],"lastModifiedDate":"2014-08-14T13:01:52","indexId":"70120432","displayToPublicDate":"1983-02-01T12:55:51","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"Wildlife guilds in Arizona desert habitats","docAbstract":"This report summarizes information produced from Interagency Agreement No. AA-851-IA1-27 between the Bureau of Land Management (BLM), USDI, and the Fish and Wildlife Service (FWS), USDI.  The contract was instrumental in the final development of wildlife guilds for the Hualapai-Aquarius planning area of the BLM in westcentral Arizona, reported herein.  The Arizona study area was selected for the application of the guilding technology because a thorough assessment of the floral and faunal resources had recently occurred in conjunction with the development of a grazing Environmental Impact Statement (EIS).  Thus, the association of wildlife species with habitat type was well known, which aided in the compilation of the data base necessary for the development of guilds.  Some data were also available that described the vegetative structure of habitats.  This was useful in the development of a model that evaluated the quality of habitat on the basis of the diversity of cover in those habitats (Short 1982).","language":"English","publisher":"U.S.D.I. Fish and Wildlife Service","publisherLocation":"Washington, D.C.","usgsCitation":"Short, H.L., 1983, Wildlife guilds in Arizona desert habitats, xi, 258 p.","productDescription":"xi, 258 p.","numberOfPages":"269","costCenters":[],"links":[{"id":292202,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -114.8166,31.3322 ], [ -114.8166,37.0043 ], [ -109.0452,37.0043 ], [ -109.0452,31.3322 ], [ -114.8166,31.3322 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53edcd57e4b0f61b386d24dd","contributors":{"authors":[{"text":"Short, Henry L.","contributorId":58695,"corporation":false,"usgs":true,"family":"Short","given":"Henry","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":498196,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70207870,"text":"70207870 - 1983 - Rheology of the lithosphere","interactions":[],"lastModifiedDate":"2020-07-09T15:46:51.784527","indexId":"70207870","displayToPublicDate":"1983-01-16T11:48:18","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3284,"text":"Reviews of Geophysics and Space Physics","active":true,"publicationSubtype":{"id":10}},"title":"Rheology of the lithosphere","docAbstract":"<p><span>During the quadrennial term 1979–1982, major advances have been made in our knowledge of the rheology of the oceanic lithosphere by the skillful combination of experimental and theoretical rock mechanics, seismology and marine geophysics in increasingly sophisticated models for the flexure of the oceanic lithosphere at seamounts and island chains, along transform faults, and at subduction zones. The relative simplicity of plate bending geometry, thermal history, and mineralogical and chemical compositions of the oceanic plates in these settings make the geophysical observations very powerful constraints on the in situ rheology of the oceanic lithosphere. In the first part of this paper, I review the laboratory work on materials appropriate to the oceanic lithosphere with emphasis on contributions during the quadrennial period and the need for future work. The important results of flexure models incorporating realistic material properties are then summarized.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/RG021i006p01458","usgsCitation":"Kirby, S.H., 1983, Rheology of the lithosphere: Reviews of Geophysics and Space Physics, v. 21, no. 6, p. 1458-1487, https://doi.org/10.1029/RG021i006p01458.","productDescription":"30 p.","startPage":"1458","endPage":"1487","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":371309,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"6","noUsgsAuthors":false,"publicationDate":"2010-06-14","publicationStatus":"PW","contributors":{"authors":[{"text":"Kirby, Stephen H. 0000-0003-1636-4688 skirby@usgs.gov","orcid":"https://orcid.org/0000-0003-1636-4688","contributorId":2752,"corporation":false,"usgs":true,"family":"Kirby","given":"Stephen","email":"skirby@usgs.gov","middleInitial":"H.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":779600,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011099,"text":"70011099 - 1983 - Temperature and precipitation estimates through the last glacial cycle from Clear Lake, California, pollen data","interactions":[],"lastModifiedDate":"2025-12-10T20:04:03.248998","indexId":"70011099","displayToPublicDate":"1983-01-14T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Temperature and precipitation estimates through the last glacial cycle from Clear Lake, California, pollen data","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>Modern pollen surface samples from six lake and marsh sites in the northern California Coast Ranges establish a linear relation between elevation and the oak/(oak + pine) pollen ratio. Modern temperature and precipitation lapse rates were used to convert variations in the pollen ratio into temperature and precipitation changes. Pollen data from two cores from Clear Lake, Lake County, California, spanning the past 40,000 and 130,000 years were used to estimate temperature and precipitation changes through the last full glacial cycle. The maximum glacial cooling is estimated to be 7° to 8° C; the last full interglacial period was about 1.5° C warmer than the Holocene, and a mid-Holocene interval was warmer than the present. The estimated precipitation changes are probably less reliable than the estimated temperature changes.</span></span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.219.4581.168","issn":"00368075","usgsCitation":"Adam, D., and West, G., 1983, Temperature and precipitation estimates through the last glacial cycle from Clear Lake, California, pollen data: Science, v. 219, no. 4581, p. 168-170, https://doi.org/10.1126/science.219.4581.168.","productDescription":"3 p.","startPage":"168","endPage":"170","costCenters":[],"links":[{"id":221425,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Clear Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -122.9635380144356,\n              39.14844575495471\n            ],\n            [\n              -122.9635380144356,\n              38.917438489493804\n            ],\n            [\n              -122.5731123436415,\n              38.917438489493804\n            ],\n            [\n              -122.5731123436415,\n              39.14844575495471\n            ],\n            [\n              -122.9635380144356,\n              39.14844575495471\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"219","issue":"4581","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba4bbe4b08c986b320541","contributors":{"authors":[{"text":"Adam, D.P.","contributorId":14815,"corporation":false,"usgs":true,"family":"Adam","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":360280,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"West, G. James","contributorId":40860,"corporation":false,"usgs":true,"family":"West","given":"G. James","affiliations":[],"preferred":false,"id":360281,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}