{"pageNumber":"5054","pageRowStart":"126325","pageSize":"25","recordCount":165579,"records":[{"id":70012390,"text":"70012390 - 1980 - Implications of regional gravity for state of stress in the earth's crust and upper mantle","interactions":[],"lastModifiedDate":"2024-07-16T16:32:20.739665","indexId":"70012390","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Implications of regional gravity for state of stress in the earth's crust and upper mantle","docAbstract":"<p><span>Topography is maintained by stress differences within the earth. Depending on the distribution of the stress we classify the support as either local or regional compensation. In general, the stresses implied in a regional compensation scheme are an order of magnitude larger than those corresponding to local isostasy. Gravity anomalies, a measure of the earth's departure from hydrostatic equilibrium, can be used to distinguish between the two compensation mechanisms and thus to estimate the magnitude of deviatoric stress in the crust and upper mantle. Topography created at an oceanic ridge crest or in a major continental orogenic zone appears to be locally compensated. Such features were formed on weak crust incapable of maintaining stress differences much greater than the stress from the applied load. Oceanic volcanoes formed on an already cooled, thickened lithosphere are regionally supported with elastic stresses. Similarly, the broad topographic rise seaward of subduction zones is elastically supported as the lithosphere is bent near the plate margin. Although the implied stress is to some degree dependent on the rheological model assumed, the gravity anomalies and surface deformation produced by these features demonstrate that the upper 30–40 km of the oceanic lithosphere is capable of regionally supporting stress differences in the 100-MPa range. Given certain conditions of load emplacement, continental crust can also support loads regionally over 100-m.y. time scales, but the effects of erosion only allow an estimate of a lower bound on stress. Data from space probes indicate that the upper layers of other terrestrial planets also support topographic-induced stress differences in excess of 100 MPa.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB085iB11p06377","issn":"01480227","usgsCitation":"McNutt, M., 1980, Implications of regional gravity for state of stress in the earth's crust and upper mantle: Journal of Geophysical Research Solid Earth, v. 85, no. B11, p. 6377-6396, https://doi.org/10.1029/JB085iB11p06377.","productDescription":"20 p.","startPage":"6377","endPage":"6396","numberOfPages":"20","costCenters":[],"links":[{"id":222473,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"85","issue":"B11","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a3929e4b0c8380cd61811","contributors":{"authors":[{"text":"McNutt, M.","contributorId":64805,"corporation":false,"usgs":true,"family":"McNutt","given":"M.","email":"","affiliations":[],"preferred":false,"id":363431,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012356,"text":"70012356 - 1980 - Geochemical exploration for uranium in playas","interactions":[],"lastModifiedDate":"2025-04-10T14:08:10.947951","indexId":"70012356","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Geochemical exploration for uranium in playas","docAbstract":"<div class=\"u-margin-s-bottom\">Playas and closed-basin lakes represent unique geochemical environments for the entrapment and concentration of mobile chemical elements. For this reason, playas may be considered as potentially favorable areas for the accumulation of uranium. We investigated playa sediments to determine their value as possible sample media for determining the presence of accumulations of uranium in the basins and playas. Instrumental neutron activation analyses were made on near-surface [0–50 ft. (0–15 m)] sediments, pore fluids, and both surface and groundwater in closed basins at Winnemucca Dry Lake, Smoke Creek Desert, Roach Lake, Columbus Marsh, and Clayton Valley, Nevada, and Sevier Lake, Utah.</div><div class=\"u-margin-s-bottom\">Although playa sediments at spring discharge areas contain as much as 58 ppm uranium, evaporation and mobilization processes were found to limit the usefulness of playa sediments as geochemical sampling media for uranium. Other metals, however, such as zinc, tungsten, and gold may have a geochemical signature in the playas. Most playas have little potential for resources of uranium. However, there are certain conditions that would make some playas more favorable than others for the accumulation of uranium. These conditions include: (1) the presence of precursor carbonate-rich saline lakes; (2) nearby uranium-rich source rocks; (3) restricted groundwater discharge into the playa; (4) localized precipitation mechanisms or phases in the playa; (5) large drainage basin and adequate precipitation; and (6) stability of a hydrologically closed basin for a long period of time.</div>","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(80)90009-6","issn":"03756742","usgsCitation":"Leach, D.L., Puchlik, K., and Glanzman, R., 1980, Geochemical exploration for uranium in playas: Journal of Geochemical Exploration, v. 13, no. 2-3, p. 251-283, https://doi.org/10.1016/0375-6742(80)90009-6.","productDescription":"33 p.","startPage":"251","endPage":"283","numberOfPages":"33","costCenters":[],"links":[{"id":222009,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a163ae4b0c8380cd550d3","contributors":{"authors":[{"text":"Leach, D. L.","contributorId":18758,"corporation":false,"usgs":true,"family":"Leach","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":363353,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Puchlik, K.P.","contributorId":6587,"corporation":false,"usgs":true,"family":"Puchlik","given":"K.P.","email":"","affiliations":[],"preferred":false,"id":363351,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Glanzman, R.K.","contributorId":14950,"corporation":false,"usgs":true,"family":"Glanzman","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":363352,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70012388,"text":"70012388 - 1980 - Littoral transport in the surf zone elucidated by an Eulerian sediment tracer","interactions":[],"lastModifiedDate":"2024-05-23T00:26:41.163495","indexId":"70012388","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2450,"text":"Journal of Sedimentary Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Littoral transport in the surf zone elucidated by an Eulerian sediment tracer","docAbstract":"<div><div id=\"12458148\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>An Eulerian, or time integration, sand tracer experiment was designed and carried out in the surf zone near Pt. Mugu, California on April 19, 1972. Data indicate that conditions of stationarity and finite boundaries required for proper application of Eulerian tracer theory exist for short time periods in the surf zone. Grain counts suggest time required for tracer sand to attain equilibrium concentration is on the order of 30-60 minutes. Grain counts also indicate transport (discharge) was strongly dependent upon grain size, with the maximum rate occurring in the size 2.5-2.75phi (0.18-0.15 mm) decreasing to both finer and coarser sizes. The measured instantaneous transport was at the annual rate of 2.4 x 10<span>&nbsp;</span><sup>6</sup><span>&nbsp;</span>m<span>&nbsp;</span><sup>3</sup><span>&nbsp;</span>/yr.</p></div></div>","language":"English","publisher":"SEPM","doi":"10.1306/212F7B26-2B24-11D7-8648000102C1865D","issn":"00224472","usgsCitation":"Duane, D., and James, W., 1980, Littoral transport in the surf zone elucidated by an Eulerian sediment tracer: Journal of Sedimentary Petrology, v. 50, no. 3, p. 929-942, https://doi.org/10.1306/212F7B26-2B24-11D7-8648000102C1865D.","productDescription":"14 p.","startPage":"929","endPage":"942","numberOfPages":"14","costCenters":[],"links":[{"id":222414,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"50","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a48b7e4b0c8380cd68096","contributors":{"authors":[{"text":"Duane, D.B.","contributorId":101942,"corporation":false,"usgs":true,"family":"Duane","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":363429,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"James, W.R.","contributorId":92425,"corporation":false,"usgs":true,"family":"James","given":"W.R.","email":"","affiliations":[],"preferred":false,"id":363428,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012330,"text":"70012330 - 1980 - Computational methods for inverse problems in geophysics: Inversion of travel time observations","interactions":[],"lastModifiedDate":"2020-03-20T06:55:43","indexId":"70012330","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3071,"text":"Physics of the Earth and Planetary Interiors","active":true,"publicationSubtype":{"id":10}},"title":"Computational methods for inverse problems in geophysics: Inversion of travel time observations","docAbstract":"<p>General ways of solving various inverse problems are studied for given travel time observations between sources and receivers. These problems are separated into three components: (a) the representation of the unknown quantities appearing in the model; (b) the nonlinear least-squares problem; (c) the direct, two-point ray-tracing problem used to compute travel time once the model parameters are given. Novel software is described for (b) and (c), and some ideas given on (a). Numerical results obtained with artificial data and an implementation of the algorithm are also presented.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0031-9201(80)90063-1","issn":"00319201","usgsCitation":"Pereyra, V., Keller, H., and Lee, W., 1980, Computational methods for inverse problems in geophysics: Inversion of travel time observations: Physics of the Earth and Planetary Interiors, v. 21, no. 2-3, p. 120-125, https://doi.org/10.1016/0031-9201(80)90063-1.","productDescription":"6 p.","startPage":"120","endPage":"125","numberOfPages":"6","costCenters":[],"links":[{"id":222133,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f951e4b0c8380cd4d570","contributors":{"authors":[{"text":"Pereyra, V.","contributorId":72932,"corporation":false,"usgs":true,"family":"Pereyra","given":"V.","affiliations":[],"preferred":false,"id":363296,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keller, H.B.","contributorId":71697,"corporation":false,"usgs":true,"family":"Keller","given":"H.B.","email":"","affiliations":[],"preferred":false,"id":363295,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lee, W.H.K.","contributorId":35303,"corporation":false,"usgs":true,"family":"Lee","given":"W.H.K.","affiliations":[],"preferred":false,"id":363294,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":93896,"text":"93896 - 1980 - Viruserkrankungen der Fische (Viral diseases of fishes)","interactions":[],"lastModifiedDate":"2012-02-02T00:04:07","indexId":"93896","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Viruserkrankungen der Fische (Viral diseases of fishes)","docAbstract":"No abstract available at this time","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Krankheiten und Schadigungen der Fische (Diseases and Injuries of Fishes): 2nd Revised ed.","largerWorkSubtype":{"id":9,"text":"Other Report"},"language":"English","publisher":"Gustav Fischer Verlag","publisherLocation":"Stuttgart, Germany","collaboration":"340/FH","usgsCitation":"Ahne, W., and Wolf, K., 1980, Viruserkrankungen der Fische (Viral diseases of fishes), chap. <i>of</i> Krankheiten und Schadigungen der Fische (Diseases and Injuries of Fishes): 2nd Revised ed., p. 56-105.","productDescription":"p. 56-105","startPage":"56","endPage":"105","numberOfPages":"50","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":129598,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"edition":"2nd Revised ed.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ee4b07f02db5fdbba","contributors":{"editors":[{"text":"Reichenbach-Klinke, H. H.","contributorId":20277,"corporation":false,"usgs":true,"family":"Reichenbach-Klinke","given":"H.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":505192,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Ahne, W.","contributorId":28554,"corporation":false,"usgs":true,"family":"Ahne","given":"W.","affiliations":[],"preferred":false,"id":298290,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wolf, K.","contributorId":16344,"corporation":false,"usgs":true,"family":"Wolf","given":"K.","email":"","affiliations":[],"preferred":false,"id":298289,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012364,"text":"70012364 - 1980 - Growth rates of manganese nodules in Oneida Lake, New York","interactions":[],"lastModifiedDate":"2023-12-13T12:25:29.680633","indexId":"70012364","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Growth rates of manganese nodules in Oneida Lake, New York","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id8\"><p><sup>226</sup>Ra is used to document the growth histories of six manganese nodules from Oneida Lake, New York. Detailed sectioning and analysis reveal that there are discontinuous gradients in<sup>226</sup>Ra content in these samples. These gradients result from periods of rapid growth (&gt;1 mm/100 years) separated by periods of no growth of erosion. Although the<sup>226</sup>Ra “age” of the nodules approximates the age of Oneida Lake, the nodules are not sediment-covered because they occur only in areas of the lake where fine-grained sediments are not accumulating.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(80)90005-9","issn":"0012821X","usgsCitation":"Moore, W., Dean, W., Krishnaswami, S., and Borole, D., 1980, Growth rates of manganese nodules in Oneida Lake, New York: Earth and Planetary Science Letters, v. 46, no. 2, p. 191-200, https://doi.org/10.1016/0012-821X(80)90005-9.","productDescription":"10 p.","startPage":"191","endPage":"200","numberOfPages":"10","costCenters":[],"links":[{"id":222135,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New York","otherGeospatial":"Oneida Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -76.22571860621142,\n              43.326711910461796\n            ],\n            [\n              -76.22571860621142,\n              43.09951463139819\n            ],\n            [\n              -75.63795005152384,\n              43.09951463139819\n            ],\n            [\n              -75.63795005152384,\n              43.326711910461796\n            ],\n            [\n              -76.22571860621142,\n              43.326711910461796\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"46","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2e04e4b0c8380cd5c22a","contributors":{"authors":[{"text":"Moore, W.S.","contributorId":90875,"corporation":false,"usgs":true,"family":"Moore","given":"W.S.","email":"","affiliations":[],"preferred":false,"id":363380,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dean, W.E.","contributorId":97099,"corporation":false,"usgs":true,"family":"Dean","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":363381,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Krishnaswami, S.","contributorId":101386,"corporation":false,"usgs":true,"family":"Krishnaswami","given":"S.","email":"","affiliations":[],"preferred":false,"id":363382,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Borole, D.V.","contributorId":33451,"corporation":false,"usgs":true,"family":"Borole","given":"D.V.","email":"","affiliations":[],"preferred":false,"id":363379,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70012611,"text":"70012611 - 1980 - Evolution of the continental margin of southern Spain and the Alboran Sea","interactions":[],"lastModifiedDate":"2018-03-13T17:03:59","indexId":"70012611","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Evolution of the continental margin of southern Spain and the Alboran Sea","docAbstract":"<p>Seismic reflection profiles and magnetic intensity measurements were collected across the southern continental margin of Spain and the Alboran basin between Spain and Africa. Correlation of the distinct seismic stratigraphy observed in the profiles to stratigraphic information obtained from cores at Deep Sea Drilling Project site 121 allows effective dating of tectonic events. The Alboran Sea basin occupies a zone of motion between the African and Iberian lithospheric plates that probably began to form by extension in late Miocene time (Tortonian). At the end of Miocene time (end of Messinian) profiles show that an angular unconformity was cut, and then the strata were block faulted before subsequent deposition. The erosion of the unconformity probably resulted from lowering of Mediterranean sea level by evaporation when the previous channel between the Mediterranean and Atlantic was closed. Continued extension probably caused the block faulting and, eventually the opening of the present channel to the Atlantic through the Strait of Gibraltar and the reflooding of the Mediterranean. Minor tectonic movements at the end of Calabrian time (early Pleistocene) apparently resulted in minor faulting, extensive transgression in southeastern Spain, and major changes in the sedimentary environment of the Alboran basin. Active faulting observed at five locations on seismic profiles seems to form a NNE zone of transcurrent movement across the Alboran Sea. This inferred fault trend is coincident with some bathymetric, magnetic and seismicity trends and colinear with active faults that have been mapped on-shore in Morocco and Spain. The faults were probably caused by stresses related to plate movements, and their direction was modified by inherited fractures in the lithosphere that floors the Alboran Sea.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(80)90087-0","issn":"00253227","usgsCitation":"Dillon, W.P., Robb, J.M., Greene, H., and Lucena, J.C., 1980, Evolution of the continental margin of southern Spain and the Alboran Sea: Marine Geology, v. 36, no. 3-4, p. 205-226, https://doi.org/10.1016/0025-3227(80)90087-0.","productDescription":"22 p.","startPage":"205","endPage":"226","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":222367,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Spain","otherGeospatial":"Alboran Sea","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -6.1138916015625,\n              35.06597313798418\n            ],\n            [\n              -2.197265625,\n              35.06597313798418\n            ],\n            [\n              -2.197265625,\n              36.87962060502676\n            ],\n            [\n              -6.1138916015625,\n              36.86643755175846\n            ],\n            [\n              -6.1138916015625,\n              35.06597313798418\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"36","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d8be4b0c8380cd53098","contributors":{"authors":[{"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":364055,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robb, James M.","contributorId":73272,"corporation":false,"usgs":true,"family":"Robb","given":"James","email":"","middleInitial":"M.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":364054,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Greene, H. Gary","contributorId":38958,"corporation":false,"usgs":true,"family":"Greene","given":"H. Gary","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":364052,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lucena, Juan Carlos","contributorId":58023,"corporation":false,"usgs":false,"family":"Lucena","given":"Juan","email":"","middleInitial":"Carlos","affiliations":[],"preferred":false,"id":364053,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70012307,"text":"70012307 - 1980 - Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska.","interactions":[],"lastModifiedDate":"2023-01-12T15:26:53.197774","indexId":"70012307","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska.","docAbstract":"<p><span>Two types of natural gas occurrences are present in the Cook Inlet basin. The major reserves (1.8 × 10</span><sup>11</sup><span>m</span><sup>3</sup><span>) occur in shallow (less than 2,300 m), nonassociated dry gas fields that contain methane with ^dgr</span><sup>13</sup><span>C in the range of -63 to -56 per mil. These gas fields are in sandstones interbedded with coals of the Sterling and Beluga Formations; the gas fields are interpreted as biogenic in origin. Lesser reserves (1.1 × 10</span><sup>10</sup><span>&nbsp;m</span><sup>3</sup><span>) of natural gas are associated with oil in the deeper Hemlock Conglomerate at the base of the Tertiary section; associated gas contains methane with ^dgr</span><sup>13</sup><span>C of about -46 per mil. The gases associated with oil in the Hemlock Conglomerate are thermogenic in origin.</span></p>","language":"English","publisher":"American Association of Petroleum Geologists","doi":"10.1306/2F91944F-16CE-11D7-8645000102C1865D","usgsCitation":"Claypool, G., Threlkeld, C.N., and Magoon, L.B., 1980, Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska.: American Association of Petroleum Geologists Bulletin, v. 64, no. 8, p. 1131-1139, https://doi.org/10.1306/2F91944F-16CE-11D7-8645000102C1865D.","productDescription":"9 p.","startPage":"1131","endPage":"1139","numberOfPages":"9","costCenters":[],"links":[{"id":221881,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Cook Inlet Basin","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -148.73008290693286,\n              61.603912894724544\n            ],\n            [\n              -152.8066533859104,\n              61.603912894724544\n            ],\n            [\n              -152.8066533859104,\n              60.06806650089854\n            ],\n            [\n              -148.73008290693286,\n              60.06806650089854\n            ],\n            [\n              -148.73008290693286,\n              61.603912894724544\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"64","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f14de4b0c8380cd4ab94","contributors":{"authors":[{"text":"Claypool, George E.","contributorId":8475,"corporation":false,"usgs":true,"family":"Claypool","given":"George E.","affiliations":[],"preferred":false,"id":363234,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Threlkeld, C. N.","contributorId":80271,"corporation":false,"usgs":true,"family":"Threlkeld","given":"C.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":363236,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Magoon, L. B.","contributorId":44531,"corporation":false,"usgs":true,"family":"Magoon","given":"L.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":363235,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70012306,"text":"70012306 - 1980 - Recovery of datable charcoal beneath young lavas: Lessons from Hawaii","interactions":[],"lastModifiedDate":"2023-08-31T15:09:08.726104","indexId":"70012306","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1093,"text":"Bulletin Volcanologique","active":true,"publicationSubtype":{"id":10}},"title":"Recovery of datable charcoal beneath young lavas: Lessons from Hawaii","docAbstract":"<p><span>Field studies in Hawaii aimed at providing a radiocarbon-based chronology of prehistoric eruptive activity have led to a good understanding of the processes that govern the formation and preservation of charcoal beneath basaltic lava flows. Charcoal formation is a rate-dependent process controlled primarily by temperature and duration of heating, as well as by moisture content, density, and size of original woody material. Charcoal will form wherever wood buried by lava is raised to sufficiently high temperatures, but owing to the availability of oxygen it is commonly burned to ash soon after formation. Wherever oxygen circulation is sufficiently restricted, however, charcoal will be preserved, but where atmospheric oxygen circulates freely, charcoal will only be preserved at lower temperature, below that required for charcoal ignition or catalytic oxidation. These factors cause carbonized wood, especially that derived from living roots, to be commonly preserved beneath all parts of pahoehoe flows (where oxygen circulation is restricted), but only under margins of aa. Practical guidelines are given for the recovery of datable charcoal beneath pahoehoe and aa. Although based on Hawaiian basaltic flows, the guidelines should be applicable to other areas.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/BF02597697","usgsCitation":"Lockwood, J.P., and Lipman, P.W., 1980, Recovery of datable charcoal beneath young lavas: Lessons from Hawaii: Bulletin Volcanologique, v. 43, no. 3, p. 609-615, https://doi.org/10.1007/BF02597697.","productDescription":"7 p.","startPage":"609","endPage":"615","numberOfPages":"7","costCenters":[],"links":[{"id":221880,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawaii","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -156.1159884915015,\n              20.194925681715915\n            ],\n            [\n              -156.1159884915015,\n              18.919476807629593\n            ],\n            [\n              -154.75002633363587,\n              18.919476807629593\n            ],\n            [\n              -154.75002633363587,\n              20.194925681715915\n            ],\n            [\n              -156.1159884915015,\n              20.194925681715915\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"43","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a333e4b0e8fec6cdb7b2","contributors":{"authors":[{"text":"Lockwood, J. P.","contributorId":104473,"corporation":false,"usgs":true,"family":"Lockwood","given":"J.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":363233,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lipman, P. W.","contributorId":93470,"corporation":false,"usgs":true,"family":"Lipman","given":"P.","middleInitial":"W.","affiliations":[],"preferred":false,"id":363232,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012323,"text":"70012323 - 1980 - Quantile estimation with more or less floodlike distributions","interactions":[],"lastModifiedDate":"2018-02-05T12:29:45","indexId":"70012323","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Quantile estimation with more or less floodlike distributions","docAbstract":"<p><span>The desirable properties of an estimator relative to a hypothetical population may be irrelevant in practice unless the population at issue more or less resembles the hypothetical population. Evidence that floods are distributed with long, stretched upper tails suggests that use of the more common distributions results in a rather precise underestimation of the extreme quantiles and thereby in the underdesign of flood protection measures.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR016i003p00547","usgsCitation":"Landwehr, J.M., Matalas, N., and Wallis, J., 1980, Quantile estimation with more or less floodlike distributions: Water Resources Research, v. 16, no. 3, p. 547-555, https://doi.org/10.1029/WR016i003p00547.","productDescription":"9 p.","startPage":"547","endPage":"555","costCenters":[],"links":[{"id":222068,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505a91f4e4b0c8380cd8057c","contributors":{"authors":[{"text":"Landwehr, J. Maciunas","contributorId":13962,"corporation":false,"usgs":false,"family":"Landwehr","given":"J.","email":"","middleInitial":"Maciunas","affiliations":[],"preferred":false,"id":363276,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Matalas, N.C.","contributorId":25173,"corporation":false,"usgs":true,"family":"Matalas","given":"N.C.","affiliations":[],"preferred":false,"id":363275,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wallis, J.R.","contributorId":79236,"corporation":false,"usgs":true,"family":"Wallis","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":363277,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70012395,"text":"70012395 - 1980 - Speculations on processes responsible for mesoscale current lineations on the continental shelf, southern California","interactions":[],"lastModifiedDate":"2014-11-14T11:52:37","indexId":"70012395","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Speculations on processes responsible for mesoscale current lineations on the continental shelf, southern California","docAbstract":"<p>A side-scan sonar survey of San Pedro shelf, California, reveals areas of mesoscale current lineations oriented approximately north-northeast in water depths of 20-25 m. Widths of sand ribbons range from 40 to 120 m and intervening erosional furrows, from 15 to 50 m. A conceptual model shows that the scale and orientation of current lineations agree with the dimensions and axial directions of Langmuir circulations theoretically generated by a combination either of southerly and southwesterly winds with regular trains of swell from the southern hemisphere or of two sets of wave trains crossing from the south and west. These longitudinal bedforms indicate shore-normal sediment transport at the times and on the areas of the shelf when and where they have been observed.</p>","language":"English","doi":"10.1016/0025-3227(80)90132-2","issn":"00253227","usgsCitation":"Karl, H.A., 1980, Speculations on processes responsible for mesoscale current lineations on the continental shelf, southern California: Marine Geology, v. 34, no. 1-2, p. M9-M18, https://doi.org/10.1016/0025-3227(80)90132-2.","productDescription":"10 p.","startPage":"M9","endPage":"M18","numberOfPages":"10","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":222533,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Pedro shelf","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -118.32275390624999,\n              33.780288785150866\n            ],\n            [\n              -118.3172607421875,\n              33.46008845688024\n            ],\n            [\n              -117.88467407226561,\n              33.46008845688024\n            ],\n            [\n              -117.89840698242188,\n              33.78371305547283\n            ],\n            [\n              -118.32275390624999,\n              33.780288785150866\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"34","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b95b7e4b08c986b31b094","contributors":{"authors":[{"text":"Karl, Herman A.","contributorId":80649,"corporation":false,"usgs":true,"family":"Karl","given":"Herman","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":363439,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012417,"text":"70012417 - 1980 - Radar, visual and thermal characteristics of Mars: Rough planar surfaces","interactions":[],"lastModifiedDate":"2024-02-21T00:38:05.781087","indexId":"70012417","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Radar, visual and thermal characteristics of Mars: Rough planar surfaces","docAbstract":"<div id=\"preview-section-abstract\"><div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"aep-abstract-id3\" class=\"abstract author\"><div id=\"aep-abstract-sec-id4\"><p>High-resolution Viking Orbiter images (10 to 15 m/pixel) contain significant information on Martian surface roughness at 25- to 100-m lateral scales, whereas Earth-based radar observations of Mars are sensitive to roughness at lateral scales of 1 to 30 m, or more. High-rms slopes predicted for the Tharsis-Memnonia-Amazonis volcanic plains from extremely weak radar returns (low peak radar cross section) are qualitatively confirmed by the Viking image data. Large-scale, curvilinear (but parallel) ridges on lava flows in the Memnonia Fossae region are interpreted as innate flow morphology caused by compressional foldover of moving lava sheets of possible rhyolite-dacite composition. The presence or absence of a recent mantle of fine-grained eolian material on the volcanic surfaces studied was determined by the visibility of fresh impact craters with diameters less than 50 m. Lava flows south and west of Arsia Mons, and within the large region of low thermal inertia centered on Tharsis Montes (H. H. Kieffer<span>&nbsp;</span><i>et al.</i>, 1977,<span>&nbsp;</span><i>J. Geophys. Res.</i><strong>82</strong>, 4249–4291), were found to possess such a recent mantle. At predawn residual temperatures ≥ −10K (south boundary of this low-temperature region), lava flows are shown to have relatively old eolian mantles. Lava flows with surfaces modified by eolian erosion and deposition occur west-northwest of Apollinaris Patera at the border of the cratered equatorial uplands and southern Elysium Planitia. Nearby yardangs, for which radar observations indicate very high-rms slopes, are similar to terrestrial features of similar origin.</p></div></div></div></div><div id=\"preview-section-introduction\"><br></div><div id=\"preview-section-snippets\"><br></div><div id=\"preview-section-references\"><br></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(80)90070-6","issn":"00191035","usgsCitation":"Schaber, G.G., 1980, Radar, visual and thermal characteristics of Mars: Rough planar surfaces: Icarus, v. 42, no. 2, p. 159-184, https://doi.org/10.1016/0019-1035(80)90070-6.","productDescription":"26 p.","startPage":"159","endPage":"184","numberOfPages":"26","costCenters":[],"links":[{"id":221946,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"42","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a938be4b0c8380cd80eab","contributors":{"authors":[{"text":"Schaber, G. G.","contributorId":68300,"corporation":false,"usgs":true,"family":"Schaber","given":"G.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":363490,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012372,"text":"70012372 - 1980 - Geologic history of Grecian Rocks, Key Largo Coral Reef Marine Sanctuary.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:01","indexId":"70012372","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1106,"text":"Bulletin of Marine Science","active":true,"publicationSubtype":{"id":10}},"title":"Geologic history of Grecian Rocks, Key Largo Coral Reef Marine Sanctuary.","docAbstract":"Two transects were drilled across the major ecologic zones of the c. 750 by 200 m reef, whose accumulation was controlled by a local Pleistocene topographic feature. The Reef is composed of 5 major ecologic zones: 1) a deep seaward rubble zone, 6-8 m depth; 2) a poorly developed spur and groove zone composed of massive head corals and Millepora (4-6 m water depth); 3) a characteristic high-energy oriented Acropora palmata zone extending from the surface down to 4 m; 4) a distinct broad reef flat composed of in situ A. palmata and coral rubble, followed by 5) a narrow low- energy back-reef zone of unoriented A. palmata, thickets of A. cervicornis, and various massive head corals in water 0-3 m deep. An extensive grass-covered carbonate sand flat 3-4 m deep extends in a landward direction from zone 5. - from Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of Marine Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00074977","usgsCitation":"Shinn, E., 1980, Geologic history of Grecian Rocks, Key Largo Coral Reef Marine Sanctuary.: Bulletin of Marine Science, v. 30, no. 3, p. 646-656.","startPage":"646","endPage":"656","numberOfPages":"11","costCenters":[],"links":[{"id":222250,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"30","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a197be4b0c8380cd559dd","contributors":{"authors":[{"text":"Shinn, E.A.","contributorId":38610,"corporation":false,"usgs":true,"family":"Shinn","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":363400,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012286,"text":"70012286 - 1980 - New evidence for magmatic intrusion beneath the Rio Grande rift, New Mexico","interactions":[],"lastModifiedDate":"2024-01-04T12:21:04.65105","indexId":"70012286","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","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":"New evidence for magmatic intrusion beneath the Rio Grande rift, New Mexico","docAbstract":"<div id=\"15274852\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>An analysis of the geomagnetic variation field across the Rio Grande rift has identified two concentrations of telluric current flow beneath the rift caused by channeling of telluric currents in electrically conductive structures in the crust and upper mantle. A shallow conductor nearly coincides with a very strong reflection in a high-resolution seismic-reflection profile across the central Rio Grande graben which has been attributed to a lens at mid-crustal depth. The deep (&gt;30 km) conductor is 200 km wide and may indicate anomalously high temperatures and, by inference, a thinning of the lithosphere beneath the rift.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1980)91<626:NEFMIB>2.0.CO;2","usgsCitation":"Towle, J., 1980, New evidence for magmatic intrusion beneath the Rio Grande rift, New Mexico: Geological Society of America Bulletin, v. 91, no. 10, p. 626-630, https://doi.org/10.1130/0016-7606(1980)91<626:NEFMIB>2.0.CO;2.","productDescription":"5 p.","startPage":"626","endPage":"630","numberOfPages":"5","costCenters":[],"links":[{"id":222469,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6578e4b0c8380cd72bdc","contributors":{"authors":[{"text":"Towle, J.N.","contributorId":94672,"corporation":false,"usgs":true,"family":"Towle","given":"J.N.","email":"","affiliations":[],"preferred":false,"id":363186,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012397,"text":"70012397 - 1980 - Degradation of the Hebgen Lake fault scarps of 1959","interactions":[],"lastModifiedDate":"2024-02-01T12:15:46.343785","indexId":"70012397","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Degradation of the Hebgen Lake fault scarps of 1959","docAbstract":"<div id=\"15739534\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Scarps produced during the Hebgen Lake earthquake of 1959 changed noticeably in 19 yr although they still appeared remarkably fresh in 1978. They have degraded much more rapidly than have those produced in 1915 and 1954 in Nevada, but a quasi-stable slope of more than 40° characterizes the Hebgen Lake scarps as compared to an upper limit of 37° on the Nevada scarps.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1980)8<225:DOTHLF>2.0.CO;2","issn":"00917613","usgsCitation":"Wallace, R., 1980, Degradation of the Hebgen Lake fault scarps of 1959: Geology, v. 8, no. 5, p. 225-229, https://doi.org/10.1130/0091-7613(1980)8<225:DOTHLF>2.0.CO;2.","productDescription":"5 p.","startPage":"225","endPage":"229","numberOfPages":"5","costCenters":[],"links":[{"id":222535,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"8","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fe57e4b0c8380cd4ecb2","contributors":{"authors":[{"text":"Wallace, R.W.","contributorId":103795,"corporation":false,"usgs":true,"family":"Wallace","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":363444,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012396,"text":"70012396 - 1980 - U-Pb ages of uraniferous opals and implications for the history of beryllium, fluorine, and uranium mineralization at Spor Mountain, Utah","interactions":[],"lastModifiedDate":"2023-12-12T23:45:01.045105","indexId":"70012396","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"U-Pb ages of uraniferous opals and implications for the history of beryllium, fluorine, and uranium mineralization at Spor Mountain, Utah","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id6\"><p>The U-Pb isotope systematics of uraniferous opals from Spor Mountain, Utah, were investigated to determine the suitability of such material for geochronologic purposes, and to estimate the timing of uranium and associated beryllium and fluorine mineralization. The results indicate that uraniferous opals can approximate a closed system for uranium and uranium daughters, so that dating samples as young as ∼1 m.y. should be possible. In addition, the expected lack of initial<sup>230</sup>Th and<sup>231</sup>Pa in opals permits valuable information on the initial<sup>234</sup>U/<sup>238</sup>U to be obtained on suitable samples of ≲10 m.y. age. The oldest<sup>207</sup>Pb/<sup>235</sup>U apparent age observed, 20.8 ± 1m.y., was that of the opal-fluorite core of a nodule from a beryllium deposit in the Spor Mountain Formation. This age is indistinguishable from that of fission-track and K-Ar ages from the host rhyolite, and links the mineralization to the first episode of alkali rhyolite magmatism and related hydrothermal activity at Spor Mountain. Successively younger ages of 13 m.y. and 8–9 m.y. on concentric outer zones of the same nodule indicate that opal formed either episodically or continuously for over 10 m.y. Several samples of both fracture-filling and massive-nodule opal associated with beryllium deposits gave<sup>207</sup>Pb/<sup>235</sup>U apparent ages of 13–16 m.y., which may reflect a restricted period of mineralization or perhaps an averaging of 21−and&lt;13−m.y. periods of opal growth. Several samples of fracture-filling opal in volcanic rocks as young as 6 m.y. gave<sup>207</sup>Pb/<sup>235</sup>U ages of 3.4–4.8 m.y. These ages may reflect hot-spring activity after the last major eruption of alkali rhyolite.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(80)90008-4","issn":"0012821X","usgsCitation":"Ludwig, K., Lindsey, D.A., Zielinski, R.A., and Simmons, K.R., 1980, U-Pb ages of uraniferous opals and implications for the history of beryllium, fluorine, and uranium mineralization at Spor Mountain, Utah: Earth and Planetary Science Letters, v. 46, no. 2, p. 221-232, https://doi.org/10.1016/0012-821X(80)90008-4.","productDescription":"12 p.","startPage":"221","endPage":"232","numberOfPages":"12","costCenters":[],"links":[{"id":222534,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","otherGeospatial":"Spor Mountain","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -113.25215279540696,\n              39.81329866968747\n            ],\n            [\n              -113.25215279540696,\n              39.69188127712721\n            ],\n            [\n              -113.11757027587542,\n              39.69188127712721\n            ],\n            [\n              -113.11757027587542,\n              39.81329866968747\n            ],\n            [\n              -113.25215279540696,\n              39.81329866968747\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"46","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb9c4e4b08c986b327dc0","contributors":{"authors":[{"text":"Ludwig, K.R.","contributorId":97112,"corporation":false,"usgs":true,"family":"Ludwig","given":"K.R.","email":"","affiliations":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"preferred":false,"id":363442,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lindsey, D. A.","contributorId":49814,"corporation":false,"usgs":true,"family":"Lindsey","given":"D.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":363440,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zielinski, R. A. 0000-0002-4047-5129","orcid":"https://orcid.org/0000-0002-4047-5129","contributorId":106930,"corporation":false,"usgs":true,"family":"Zielinski","given":"R.","email":"","middleInitial":"A.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":363443,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Simmons, K. R.","contributorId":68771,"corporation":false,"usgs":true,"family":"Simmons","given":"K.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":363441,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70012371,"text":"70012371 - 1980 - Radiometric dating of sediments using fission tracks in conodonts","interactions":[],"lastModifiedDate":"2012-03-12T17:19:04","indexId":"70012371","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Radiometric dating of sediments using fission tracks in conodonts","docAbstract":"Conodonts are microfossils which are commonly found in marine rocks of Cambrian to Triassic age. Although their biological affinities are difficult to assess, conodonts are valuable stratigraphical indices for much of their geological range1. Recent work has also established that conodont colour alteration indices (CAI) are useful guides to diagenetic temperatures and hence burial depth2. Fission tracks3 in conodonts allow measurement of uranium concentrations and estimates of 'age' to be made using isotopic methods4. We report here that fission tracks counted in irradiated, thermally unaltered (as indicated by CAI) middle Palaeozoic conodonts indicate typical uranium concentrations of ???1 part in 10 9, with some samples higher. A single specimen of Siphonodella from the Lower Mississippian yielded an age estimate of 380??140 Myr consistent with conventional interpolations. This method may also allow the unroofing of deeply buried sediments to be dated. ?? 1980 Nature Publishing Group.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1038/288359a0","issn":"00280836","usgsCitation":"Sachs, H., Denkinger, M., Bennett, C., and Harris, A., 1980, Radiometric dating of sediments using fission tracks in conodonts: Nature, v. 288, no. 5789, p. 359-361, https://doi.org/10.1038/288359a0.","startPage":"359","endPage":"361","numberOfPages":"3","costCenters":[],"links":[{"id":205211,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/288359a0"},{"id":222200,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"288","issue":"5789","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9413e4b0c8380cd811ba","contributors":{"authors":[{"text":"Sachs, H.M.","contributorId":92805,"corporation":false,"usgs":true,"family":"Sachs","given":"H.M.","email":"","affiliations":[],"preferred":false,"id":363399,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Denkinger, M.","contributorId":15349,"corporation":false,"usgs":true,"family":"Denkinger","given":"M.","email":"","affiliations":[],"preferred":false,"id":363396,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bennett, C.L.","contributorId":28368,"corporation":false,"usgs":true,"family":"Bennett","given":"C.L.","email":"","affiliations":[],"preferred":false,"id":363397,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Harris, A. G.","contributorId":39791,"corporation":false,"usgs":true,"family":"Harris","given":"A. G.","affiliations":[],"preferred":false,"id":363398,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70012368,"text":"70012368 - 1980 - Clarification of the Hashin-Shtrikman bounds on the effective elastic moduli of polycrystals with hexagonal, trigonal, and tetragonal symmetries","interactions":[],"lastModifiedDate":"2012-03-12T17:19:03","indexId":"70012368","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2171,"text":"Journal of Applied Physics","active":true,"publicationSubtype":{"id":10}},"title":"Clarification of the Hashin-Shtrikman bounds on the effective elastic moduli of polycrystals with hexagonal, trigonal, and tetragonal symmetries","docAbstract":"Bounds on the effective elastic moduli of randomly oriented aggregates of hexagonal, trigonal, and tetragonal crystals are derived using the variational principles of Hashin and Shtrikman. The bounds are considerably narrower than the widely used Voigt and Reuss bounds. The Voigt-Reuss-Hill average lies within the Hashin-Shtrikman bounds in nearly all cases. Previous bounds of Peselnick and Meister are shown to be special cases of the present results.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Applied Physics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1063/1.327804","issn":"00214922","usgsCitation":"Watt, J., and Peselnick, L., 1980, Clarification of the Hashin-Shtrikman bounds on the effective elastic moduli of polycrystals with hexagonal, trigonal, and tetragonal symmetries: Journal of Applied Physics, v. 51, no. 3, p. 1525-1531, https://doi.org/10.1063/1.327804.","startPage":"1525","endPage":"1531","numberOfPages":"7","costCenters":[],"links":[{"id":205209,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1063/1.327804"},{"id":222197,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"51","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f614e4b0c8380cd4c5a1","contributors":{"authors":[{"text":"Watt, J.P.","contributorId":42355,"corporation":false,"usgs":true,"family":"Watt","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":363390,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peselnick, L.","contributorId":66825,"corporation":false,"usgs":true,"family":"Peselnick","given":"L.","affiliations":[],"preferred":false,"id":363391,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012296,"text":"70012296 - 1980 - Comparison of three techniques for the determination of uranium and thorium in rocks","interactions":[],"lastModifiedDate":"2013-01-21T12:35:56","indexId":"70012296","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of three techniques for the determination of uranium and thorium in rocks","docAbstract":"U and Th concentrations have been determined in a series of selected whole-rock samples, using three different techniques: neutron activation analysis (INAA), X-ray fluorescence spectrometry (XRF) and isotope dilution mass spectrometry (ID). The INAA technique yields U and Th data that are comparable with those obtained by ID over the entire concentration range studied. XRF only provides data with comparable precision at relatively high concentrations (> 10 ppm) but has the advantage of being able to determine other useful elements such as Rb, Sr, Pb and K. The choice between INAA and XRF therefore depends on the concentration levels anticipated, together with the overall requirements for the particular study. ?? 1980.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chemical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0009-2541(80)90030-3","issn":"00092541","usgsCitation":"Hart, R.J., Reid, D., Stuckless, J., and Welke, H., 1980, Comparison of three techniques for the determination of uranium and thorium in rocks: Chemical Geology, v. 29, no. 1-4, p. 345-350, https://doi.org/10.1016/0009-2541(80)90030-3.","startPage":"345","endPage":"350","numberOfPages":"6","costCenters":[],"links":[{"id":222649,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266130,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0009-2541(80)90030-3"}],"volume":"29","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f8b4e4b0c8380cd4d240","contributors":{"authors":[{"text":"Hart, R. J.","contributorId":62607,"corporation":false,"usgs":true,"family":"Hart","given":"R.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":363208,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reid, D.L.","contributorId":39524,"corporation":false,"usgs":true,"family":"Reid","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":363207,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stuckless, J. S.","contributorId":6060,"corporation":false,"usgs":true,"family":"Stuckless","given":"J. S.","affiliations":[],"preferred":false,"id":363205,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Welke, H.J.","contributorId":29572,"corporation":false,"usgs":true,"family":"Welke","given":"H.J.","email":"","affiliations":[],"preferred":false,"id":363206,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70012351,"text":"70012351 - 1980 - Aerial photography summary record system - five years later.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:07","indexId":"70012351","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Aerial photography summary record system - five years later.","docAbstract":"Describes the APSRS, an automated information system for conventional aerial photography projects, established after the formation of the National Cartographic Information Center in the US Geological Survey in 1974. -after Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Photogrammetric Engineering and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Lauterborn, T., 1980, Aerial photography summary record system - five years later.: Photogrammetric Engineering and Remote Sensing, v. 46, no. 12, p. 1537-1539.","startPage":"1537","endPage":"1539","numberOfPages":"3","costCenters":[],"links":[{"id":221941,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"46","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e71ae4b0c8380cd4784f","contributors":{"authors":[{"text":"Lauterborn, T.J.","contributorId":53658,"corporation":false,"usgs":true,"family":"Lauterborn","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":363342,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012394,"text":"70012394 - 1980 - Hydrocarbon gas in sediment from the shelf, slope and basin of the Bering Sea.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:03","indexId":"70012394","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Hydrocarbon gas in sediment from the shelf, slope and basin of the Bering Sea.","docAbstract":"Methane, ethane, ethene, propane, propene, isobutane and n-butane are present in low concentrations in the top 2m of sediment. Methane is most abundant and its concentration increases with depth in the sediment. Ethane, ethene, propane and propene are present in almost all samples, but the concentrations of these gases are about two orders of magnitude-lower than the concentration of methane. The average ratios of ethane to ethene are usually greater than one in shelf sediment, about one in slope sediment, and usually less than one in basin sediments. These hydrocarbon gases are probably derived from low-temperature chemical and biochemical processes operating at or near the sea-floor. -from Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochimica et Cosmochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/0016-7037(80)90068-X","issn":"00167037","usgsCitation":"Kvenvolden, K., and Redden, G., 1980, Hydrocarbon gas in sediment from the shelf, slope and basin of the Bering Sea.: Geochimica et Cosmochimica Acta, v. 44, no. 8, p. 1145-1150, https://doi.org/10.1016/0016-7037(80)90068-X.","startPage":"1145","endPage":"1150","numberOfPages":"6","costCenters":[],"links":[{"id":205256,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0016-7037(80)90068-X"},{"id":222532,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"44","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3318e4b0c8380cd5ed11","contributors":{"authors":[{"text":"Kvenvolden, K.A.","contributorId":80674,"corporation":false,"usgs":true,"family":"Kvenvolden","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":363438,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Redden, G.D.","contributorId":63008,"corporation":false,"usgs":true,"family":"Redden","given":"G.D.","email":"","affiliations":[],"preferred":false,"id":363437,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012610,"text":"70012610 - 1980 - Circum-arctic plate accretion - Isolating part of a pacific plate to form the nucleus of the Arctic Basin","interactions":[],"lastModifiedDate":"2023-12-12T23:40:35.882969","indexId":"70012610","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Circum-arctic plate accretion - Isolating part of a pacific plate to form the nucleus of the Arctic Basin","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id4\"><p>A mosaic of large lithospheric plates rims the Arctic Ocean Basin, and foldbelts between these plates contain numerous allochthonous microplates. A new model for continental drift and microplate accretion proposes that prior to the late Mesozoic the Kula plate extended from the Pacific into the Arctic. By a process of circumpolar drift and microplate accretion, fragments of the Pacific basin, including parts of the Kula plate, were cut off and isolated in the Arctic Ocean, the Yukon-Koyukuk basin in Alaska, and the Bering Sea.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(80)90199-5","issn":"0012821X","usgsCitation":"Churkin, M., and Trexler, J., 1980, Circum-arctic plate accretion - Isolating part of a pacific plate to form the nucleus of the Arctic Basin: Earth and Planetary Science Letters, v. 48, no. 2, p. 356-362, https://doi.org/10.1016/0012-821X(80)90199-5.","productDescription":"7 p.","startPage":"356","endPage":"362","numberOfPages":"7","costCenters":[],"links":[{"id":222366,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f607e4b0c8380cd4c567","contributors":{"authors":[{"text":"Churkin, M. Jr.","contributorId":46682,"corporation":false,"usgs":true,"family":"Churkin","given":"M.","suffix":"Jr.","affiliations":[],"preferred":false,"id":364051,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Trexler, J.H. Jr.","contributorId":46221,"corporation":false,"usgs":true,"family":"Trexler","given":"J.H.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":364050,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012245,"text":"70012245 - 1980 - Petroleum geology of Kodiak Shelf, Alaska.","interactions":[],"lastModifiedDate":"2023-01-12T14:51:02.103478","indexId":"70012245","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Petroleum geology of Kodiak Shelf, Alaska.","docAbstract":"<p><span>Organic geochemical data show that Cenozoic rocks on Kodiak Island, in Albatross basin, and under the continental slope generally contain less than 0.5 wt. % organic carbon. Moreover, kerogen from all rocks analyzed is predominantly (60 to 100%) herbaceous; woody and coaly kerogens are present in secondary (20 to 40%) amounts. Most strata in shelf basins are thermally immature; however, Eocene and Oligocene strata, which probably floor the shelf basins, are mature on the basis of comparison with coeval strata onshore. Eocene and Oligocene rocks have poor reservoir properties; the best reservoirs are probably in upper Miocene or Pliocene and younger rocks. Potential traps for hydrocarbons include Tugidak uplift, parts of Albatross Bank, structures in the central-shelf upli t, and Portlock anticline. Overall, unless hydrocarbon source rock properties improve offshore, gas and gas condensate are the most likely hydrocarbons to have been generated.</span></p>","language":"English","publisher":"American Association of Petroleum Geologists","doi":"10.1306/2F919454-16CE-11D7-8645000102C1865D","usgsCitation":"Fisher, M.A., 1980, Petroleum geology of Kodiak Shelf, Alaska.: American Association of Petroleum Geologists Bulletin, v. 64, no. 8, p. 1140-1157, https://doi.org/10.1306/2F919454-16CE-11D7-8645000102C1865D.","productDescription":"18 p.","startPage":"1140","endPage":"1157","numberOfPages":"18","costCenters":[],"links":[{"id":221878,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Kodiak Shelf","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -154.01375692725824,\n              55.219278425030836\n            ],\n            [\n              -148.41023346491082,\n              57.87176430180736\n            ],\n            [\n              -150.42005047765028,\n              58.87849102063663\n            ],\n            [\n              -157.04675941117267,\n              55.31014311523322\n            ],\n            [\n              -154.01375692725824,\n              55.219278425030836\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"64","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a77d6e4b0c8380cd785ac","contributors":{"authors":[{"text":"Fisher, Michael A. mfisher@usgs.gov","contributorId":1991,"corporation":false,"usgs":true,"family":"Fisher","given":"Michael","email":"mfisher@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":363079,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012434,"text":"70012434 - 1980 - Computer-composite mapping for geologists","interactions":[],"lastModifiedDate":"2012-03-12T17:19:04","indexId":"70012434","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1539,"text":"Environmental Geology","active":true,"publicationSubtype":{"id":10}},"title":"Computer-composite mapping for geologists","docAbstract":"A computer program for overlaying maps has been tested and evaluated as a means for producing geologic derivative maps. Four maps of the Sugar House Quadrangle, Utah, were combined, using the Multi-Scale Data Analysis and Mapping Program, in a single composite map that shows the relative stability of the land surface during earthquakes. Computer-composite mapping can provide geologists with a powerful analytical tool and a flexible graphic display technique. Digitized map units can be shown singly, grouped with different units from the same map, or combined with units from other source maps to produce composite maps. The mapping program permits the user to assign various values to the map units and to specify symbology for the final map. Because of its flexible storage, easy manipulation, and capabilities of graphic output, the composite-mapping technique can readily be applied to mapping projects in sedimentary and crystalline terranes, as well as to maps showing mineral resource potential. ?? 1980 Springer-Verlag New York Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF02473490","issn":"09430105","usgsCitation":"van Driel, J., 1980, Computer-composite mapping for geologists: Environmental Geology, v. 3, no. 3, p. 151-157, https://doi.org/10.1007/BF02473490.","startPage":"151","endPage":"157","numberOfPages":"7","costCenters":[],"links":[{"id":205212,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02473490"},{"id":222202,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f96fe4b0c8380cd4d5ea","contributors":{"authors":[{"text":"van Driel, J.N.","contributorId":29959,"corporation":false,"usgs":true,"family":"van Driel","given":"J.N.","email":"","affiliations":[],"preferred":false,"id":363571,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012244,"text":"70012244 - 1980 - Evaluation of organic matter, subsurface temperature and pressure with regard to gas generation in low-permeability Upper Cretaceous and Lower Tertiary sandstones in Pacific Creek area, Sublette and Sweetwater Counties, Wyoming.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:07","indexId":"70012244","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2789,"text":"Mountain Geologist","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of organic matter, subsurface temperature and pressure with regard to gas generation in low-permeability Upper Cretaceous and Lower Tertiary sandstones in Pacific Creek area, Sublette and Sweetwater Counties, Wyoming.","docAbstract":"The onset of overpressuring occurs at c.3,500 m, near the base of the U. Cretaceous Lance Formation. The development of overpressuring may involve several processes; however, interpretation of the available information indicates that active generation of large amounts of wet gas is one of the more important processes. The present minimum temperature at the top of overpressuring is at least 88oC. The preservation of abnormally high pressures is due to presently active generation of gas in a thick interval of discontinuous, very low-permeability shales, siltstones, and sandstones. - from Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mountain Geologist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"0027254X","usgsCitation":"Law, B.E., Spencer, C.W., and Bostick, N.H., 1980, Evaluation of organic matter, subsurface temperature and pressure with regard to gas generation in low-permeability Upper Cretaceous and Lower Tertiary sandstones in Pacific Creek area, Sublette and Sweetwater Counties, Wyoming.: Mountain Geologist, v. 17, no. 2, p. 23-35.","startPage":"23","endPage":"35","numberOfPages":"13","costCenters":[],"links":[{"id":221877,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0ca6e4b0c8380cd52c38","contributors":{"authors":[{"text":"Law, B. E.","contributorId":17586,"corporation":false,"usgs":true,"family":"Law","given":"B.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":363076,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Spencer, C. W.","contributorId":65826,"corporation":false,"usgs":true,"family":"Spencer","given":"C.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":363077,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bostick, N. H.","contributorId":67099,"corporation":false,"usgs":true,"family":"Bostick","given":"N.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":363078,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
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