{"pageNumber":"5955","pageRowStart":"148850","pageSize":"25","recordCount":184569,"records":[{"id":5200035,"text":"5200035 - 1976 - Sexual Size Dimorphism in Hawks and Owls of North America","interactions":[],"lastModifiedDate":"2012-02-02T00:15:23","indexId":"5200035","displayToPublicDate":"2009-06-09T09:33:21","publicationYear":"1976","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":3,"text":"Organization Series"},"seriesTitle":{"id":203,"text":"Ornithological Monographs","active":false,"publicationSubtype":{"id":3}},"seriesNumber":"No. 20.","title":"Sexual Size Dimorphism in Hawks and Owls of North America","language":"English","usgsCitation":"Snyder, N., and Wiley, J.W., 1976, Sexual Size Dimorphism in Hawks and Owls of North America: Ornithological Monographs No. 20., xvi, 96.","productDescription":"xvi, 96","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":202718,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db699f37","contributors":{"authors":[{"text":"Snyder, N.F.R.","contributorId":59383,"corporation":false,"usgs":true,"family":"Snyder","given":"N.F.R.","email":"","affiliations":[],"preferred":false,"id":326858,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wiley, J. W.","contributorId":51399,"corporation":false,"usgs":false,"family":"Wiley","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":326857,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5200028,"text":"5200028 - 1976 - American woodcock in West Virginia","interactions":[],"lastModifiedDate":"2012-02-02T00:15:23","indexId":"5200028","displayToPublicDate":"2009-06-09T09:33:21","publicationYear":"1976","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":3,"text":"Organization Series"},"seriesTitle":{"id":162,"text":"Bulletin","active":false,"publicationSubtype":{"id":3}},"seriesNumber":"No. 8.","title":"American woodcock in West Virginia","language":"English","publisher":"West Virginia Department of Natural Resources","publisherLocation":"Charleston","collaboration":"OCLC: 6479691. 'Pittman-Robertson Project W-37-R and Accelerated Research Program for Migratory Shore and Upland Game Birds.'","usgsCitation":"Kletzly, R., 1976, American woodcock in West Virginia: Bulletin No. 8., 46.","productDescription":"46","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":202781,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adce4b07f02db6868c6","contributors":{"authors":[{"text":"Kletzly, R.C.","contributorId":23666,"corporation":false,"usgs":true,"family":"Kletzly","given":"R.C.","email":"","affiliations":[],"preferred":false,"id":326840,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":5211396,"text":"5211396 - 1976 - Comments on recent canvasback habitat trends and threats on Chesapeake Bay","interactions":[],"lastModifiedDate":"2012-02-02T00:15:26","indexId":"5211396","displayToPublicDate":"2009-06-09T09:23:20","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Comments on recent canvasback habitat trends and threats on Chesapeake Bay","docAbstract":"During the last 22 years, the North American winter population of canvasbacks has fluctuated from 481,000 in 1955 to 179,000 in 1972. The Chesapeake Bay population has averaged 33 percent of the North American population and 64 percent of the Atlantic Flyway population. In Maryland, significant annual fluctuations have been recorded between the eastern and western shore of Chesapeake Bay. In 1968, 11 percent of the Bay canvasbacks were on the western shore, whereas in 1971, 87 percent of the birds wintered in this area. This increase in 1971 is believed to be in response to large populations of small Rangia cuneata clams. I n recent years, mortality of small clams and reduced spawning have resulted in a larger size class for Rangia making them less desirable as a waterfowl food. Canvasback populations in 1975 and 1976 were more dispersed in Chesapeake Bay when the predominant food of canvasbacks was Macoma balthica. In the last 5 years, the number of canvasbacks wintering in Chesapeake Bay has declined slightly, while the North American and Atlantic Flyway populations have increased. Increases have been noted in New Jersey and North Carolina. This trend may indicate that the quality of canvasback habitat in Chesapeake Bay is declining at a faster rate than other areas along the Atlantic coast.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"North Dakota Game and Fish Department","publisherLocation":"Bismark","collaboration":"Hosted by North Dakota Game and Fish Department and the Northern Prairie Wildlife Research Center, U.S. Fish and Wildlife Service. Sponsors, Central Mountains and Plains Section and North Dakota Chapter of the Wildlife Society.","usgsCitation":"Perry, M., 1976, Comments on recent canvasback habitat trends and threats on Chesapeake Bay, chap. of Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota.","productDescription":"v, 63","startPage":"17 (abs)","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":203027,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae6a6","contributors":{"authors":[{"text":"Perry, Matthew C. 0000-0001-6452-9534","orcid":"https://orcid.org/0000-0001-6452-9534","contributorId":16372,"corporation":false,"usgs":true,"family":"Perry","given":"Matthew C.","affiliations":[],"preferred":false,"id":330943,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":5211395,"text":"5211395 - 1976 - Preliminary assessment of aerial photography techniques for canvasback population analysis","interactions":[],"lastModifiedDate":"2012-02-02T00:15:22","indexId":"5211395","displayToPublicDate":"2009-06-09T09:23:20","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Preliminary assessment of aerial photography techniques for canvasback population analysis","docAbstract":"Recent intensive research on the canvasback has focused attention on the need for more precise estimates of population parameters. During the 1972-75 period, various types of aerial photographing equipment were evaluated to determine the problems and potentials for employing these techniques in appraisals of canvasback populations. The equipment and procedures available for automated analysis of aerial photographic imagery were also investigated. Serious technical problems remain to be resolved, but some promising results were obtained. Final conclusions about the feasibility of operational implementation await a more rigorous analysis of the data collected.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"North Dakota Game and Fish Department","publisherLocation":"Bismark","collaboration":"Hosted by North Dakota Game and Fish Department and the Northern Prairie Wildlife Research Center, U.S. Fish and Wildlife Service. Sponsors, Central Mountains and Plains Section and North Dakota Chapter of the Wildlife Society.","usgsCitation":"Munro, R.E., and Trauger, D., 1976, Preliminary assessment of aerial photography techniques for canvasback population analysis, chap. of Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota, p. 7-10.","productDescription":"v, 63","startPage":"7","endPage":"10","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":200604,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac9e4b07f02db67ca5d","contributors":{"authors":[{"text":"Munro, R. E.","contributorId":75656,"corporation":false,"usgs":true,"family":"Munro","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":330942,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Trauger, D.L.","contributorId":69091,"corporation":false,"usgs":true,"family":"Trauger","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":330941,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5211398,"text":"5211398 - 1976 - Incidence of lead shot in canvasbacks","interactions":[],"lastModifiedDate":"2012-02-02T00:15:26","indexId":"5211398","displayToPublicDate":"2009-06-09T09:23:20","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Incidence of lead shot in canvasbacks","docAbstract":"During 1975 and 1976, 2,544 canvasbacks (Aythya valisineria) from North Dakota, Wisconsin, Illinois, and Maryland were flouroscoped to determine the incidence of body shot. A significant increase from west to east was detected in the incidence of shot for immatures from the four states. The incidence of shot in immatures after the 1975-76 hunting season was 18 percent in Maryland and 20 percent in Illinois. In Wisconsin no difference in the incidence of shot could be detected between areas trapped or time periods when trapping was conducted. In Maryland a significant decrease in the incidence of body shot was detected in adults, but not immatures, between 1975 and 1976. shot was located throughout the body of canvasbacks. Frequency varied from one to nine shot per bird and averaged 2.0 for adults and 1.5 for immatures.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"North Dakota Game and Fish Department","publisherLocation":"Bismark","collaboration":"Hosted by North Dakota Game and Fish Department and the Northern Prairie Wildlife Research Center, U.S. Fish and Wildlife Service. Sponsors, Central Mountains and Plains Section and North Dakota Chapter of the Wildlife Society.","usgsCitation":"Perry, M., 1976, Incidence of lead shot in canvasbacks, chap. of Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota, p. 46-47.","productDescription":"v, 63","startPage":"46","endPage":"47","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":203073,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fce4b07f02db5f57d4","contributors":{"authors":[{"text":"Perry, Matthew C. 0000-0001-6452-9534","orcid":"https://orcid.org/0000-0001-6452-9534","contributorId":16372,"corporation":false,"usgs":true,"family":"Perry","given":"Matthew C.","affiliations":[],"preferred":false,"id":330947,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":5211443,"text":"5211443 - 1976 - Trumpeter swan, Cygnus buccinator Richardson","interactions":[],"lastModifiedDate":"2012-02-02T00:15:27","indexId":"5211443","displayToPublicDate":"2009-06-09T09:23:20","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Trumpeter swan, Cygnus buccinator Richardson","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Handbook of North American Birds 2: Waterfowl, Part 1","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Yale University Press","publisherLocation":"New Haven, Connecticut","usgsCitation":"Banko, W., and Schorger, A., 1976, Trumpeter swan, Cygnus buccinator Richardson, chap. of Handbook of North American Birds 2: Waterfowl, Part 1, p. 55-71.","productDescription":"xi, 521","startPage":"55","endPage":"71","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":202947,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a49e4b07f02db624321","contributors":{"editors":[{"text":"Palmer, Ralph S.","contributorId":111637,"corporation":false,"usgs":true,"family":"Palmer","given":"Ralph","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":508130,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Banko, W.E.","contributorId":62694,"corporation":false,"usgs":true,"family":"Banko","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":331073,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schorger, A.W.","contributorId":58747,"corporation":false,"usgs":true,"family":"Schorger","given":"A.W.","email":"","affiliations":[],"preferred":false,"id":331072,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5211397,"text":"5211397 - 1976 - Chemical pollutants in field-collected canvasback tissues, eggs, and food materials","interactions":[],"lastModifiedDate":"2012-02-02T00:15:26","indexId":"5211397","displayToPublicDate":"2009-06-09T09:23:20","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Chemical pollutants in field-collected canvasback tissues, eggs, and food materials","docAbstract":"In 1972 studies began on the levels of environmental pollutants in canvasback tissues, eggs, and food items. The purpose of the studies were to determine if the levels of toxic chemicals found in canvasbacks were of the magnitude to cause problems affecting reproduction and survival. Overall, levels of organochlorine pesticides and PCB's were low in canvasbacks and their eggs. Some individual birds, however, laid eggs with elevated residues of DDE (12.1 ppm) or PCB's (28.6 ppm). There was no significant difference between eggshell thicknesses of 1972-73 and pre-1946 collections. About 12% of the canvasbacks analyzed had elevated levels of blood lead with reduced ALAD enzyme activity. Adult canvasbacks collected from the Chesapeake Bay in 1975 had moderate to high levels of cadmium in their kidneys. Cadmium, in excessive amounts is very toxic and can curtail spermatogenesis in male birds. Although no single toxic chemical found in wild canvasbacks appears to be a major factor in population declines, the cumulative effects of sublethal levels of all the pollutants may render birds susceptible to disease, hunting pressure or predation.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"North Dakota Game and Fish Department","publisherLocation":"Bismark","collaboration":"Hosted by North Dakota Game and Fish Department and the Northern Prairie Wildlife Research Center, U.S. Fish and Wildlife Service. Sponsors, Central Mountains and Plains Section and North Dakota Chapter of the Wildlife Society.","usgsCitation":"White, D.H., Dieter, M.P., and Stendell, R., 1976, Chemical pollutants in field-collected canvasback tissues, eggs, and food materials, chap. of Transactions of the Canvasback Workshop : April 6-7, 1976, Ramada Inn, Jamestown, North Dakota.","productDescription":"v, 63","startPage":"18 (abs)","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":203028,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49e2e4b07f02db5e49c3","contributors":{"authors":[{"text":"White, Donald H.","contributorId":97868,"corporation":false,"usgs":true,"family":"White","given":"Donald","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":330946,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dieter, M. P.","contributorId":89626,"corporation":false,"usgs":true,"family":"Dieter","given":"M.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":330945,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stendell, Rey C.","contributorId":82263,"corporation":false,"usgs":true,"family":"Stendell","given":"Rey C.","affiliations":[],"preferred":false,"id":330944,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":5210491,"text":"5210491 - 1976 - Behavioral and intellectual adaptations of selected mammalian predators to the problem of hunting large animals","interactions":[],"lastModifiedDate":"2012-02-02T00:15:19","indexId":"5210491","displayToPublicDate":"2009-06-09T09:23:17","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Behavioral and intellectual adaptations of selected mammalian predators to the problem of hunting large animals","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Socioecology and Psychology of Primates","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Mouton Publishers","publisherLocation":"The Hague","collaboration":"Held in Chicago","usgsCitation":"Peters, R., and Mech, L., 1976, Behavioral and intellectual adaptations of selected mammalian predators to the problem of hunting large animals, chap. of Socioecology and Psychology of Primates, p. 279-300.","productDescription":"xv, 474","startPage":"279","endPage":"300","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":200574,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4afee4b07f02db69728f","contributors":{"editors":[{"text":"Tuttle, R.H.","contributorId":112415,"corporation":false,"usgs":true,"family":"Tuttle","given":"R.H.","email":"","affiliations":[],"preferred":false,"id":506529,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Peters, R.P.","contributorId":75237,"corporation":false,"usgs":true,"family":"Peters","given":"R.P.","email":"","affiliations":[],"preferred":false,"id":328534,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mech, L.D. 0000-0003-3944-7769","orcid":"https://orcid.org/0000-0003-3944-7769","contributorId":75466,"corporation":false,"usgs":false,"family":"Mech","given":"L.D.","email":"","affiliations":[],"preferred":false,"id":328535,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5210133,"text":"5210133 - 1976 - Distribution and abundance of non-waterfowl avifauna of the lower Columbia River Basin","interactions":[],"lastModifiedDate":"2012-02-02T00:15:19","indexId":"5210133","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Distribution and abundance of non-waterfowl avifauna of the lower Columbia River Basin","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Inventory of Riparian Habitats and Associated Wildlife along the Columbia River. Volume 2A. ","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"U.S. Army Corps of Engineers","collaboration":"OCLC: 41693361","usgsCitation":"Scott, J.M., and Reynolds, R., 1976, Distribution and abundance of non-waterfowl avifauna of the lower Columbia River Basin, chap. of Inventory of Riparian Habitats and Associated Wildlife along the Columbia River. Volume 2A. , p. 24-35.","startPage":"24","endPage":"35","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201128,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a81e4b07f02db64a02e","contributors":{"editors":[{"text":"Tabor, J.E.","contributorId":112464,"corporation":false,"usgs":true,"family":"Tabor","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":506038,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Scott, J. M.","contributorId":55766,"corporation":false,"usgs":true,"family":"Scott","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":327833,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reynolds, R.T.","contributorId":21655,"corporation":false,"usgs":true,"family":"Reynolds","given":"R.T.","email":"","affiliations":[],"preferred":false,"id":327832,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5210144,"text":"5210144 - 1976 - Dominance and dominance-related behavior in the whooping crane","interactions":[],"lastModifiedDate":"2012-02-02T00:15:20","indexId":"5210144","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Dominance and dominance-related behavior in the whooping crane","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the International Crane Workshop","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Oklahoma State University","publisherLocation":"Stillwater","collaboration":"Held in 1975.","usgsCitation":"Kepler, C.B., 1976, Dominance and dominance-related behavior in the whooping crane, chap. of Proceedings of the International Crane Workshop, p. 177-196.","productDescription":"vi, 355","startPage":"177","endPage":"196","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201135,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a61e4b07f02db636057","contributors":{"editors":[{"text":"Lewis, James C.","contributorId":76800,"corporation":false,"usgs":true,"family":"Lewis","given":"James","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":506055,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Kepler, C. B.","contributorId":62548,"corporation":false,"usgs":true,"family":"Kepler","given":"C.","middleInitial":"B.","affiliations":[],"preferred":false,"id":327850,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":5210201,"text":"5210201 - 1976 - The effects of petroleum hydrocarbons on aquatic birds","interactions":[],"lastModifiedDate":"2012-02-02T00:15:13","indexId":"5210201","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"The effects of petroleum hydrocarbons on aquatic birds","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Sources, Effects, and Sinks of Hydrocarbons in the Aquatic Environment: Proceedings of the Symposium","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"American Institute of Biological Sciences","publisherLocation":"Washington, DC","collaboration":"No editor.","usgsCitation":"Dieter, M.P., 1976, The effects of petroleum hydrocarbons on aquatic birds, chap. of Sources, Effects, and Sinks of Hydrocarbons in the Aquatic Environment: Proceedings of the Symposium, p. 438-446.","productDescription":"vi, 578","startPage":"438","endPage":"446","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":196016,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a9be4b07f02db65de5e","contributors":{"authors":[{"text":"Dieter, M. P.","contributorId":89626,"corporation":false,"usgs":true,"family":"Dieter","given":"M.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":327954,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":5210113,"text":"5210113 - 1976 - Distribution and abundance of aquatic vegetation in the upper Chesapeake Bay, 1971-1974","interactions":[],"lastModifiedDate":"2012-02-02T00:15:17","indexId":"5210113","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Distribution and abundance of aquatic vegetation in the upper Chesapeake Bay, 1971-1974","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"The Effects of Tropical Storm Agnes on the Chesapeake Bay Estuarine System","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Johns Hopkins University Press","publisherLocation":"Baltimore, MD","collaboration":"OCLC: 3003229","usgsCitation":"Kerwin, J., Munro, R.E., and Peterson, W., 1976, Distribution and abundance of aquatic vegetation in the upper Chesapeake Bay, 1971-1974, chap. of The Effects of Tropical Storm Agnes on the Chesapeake Bay Estuarine System, p. 393-400.","productDescription":"xiii, 639","startPage":"393","endPage":"400","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201249,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a81e4b07f02db64a159","contributors":{"authors":[{"text":"Kerwin, J.A.","contributorId":105394,"corporation":false,"usgs":true,"family":"Kerwin","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":327805,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Munro, R. E.","contributorId":75656,"corporation":false,"usgs":true,"family":"Munro","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":327804,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peterson, W.W.A.","contributorId":69271,"corporation":false,"usgs":true,"family":"Peterson","given":"W.W.A.","email":"","affiliations":[],"preferred":false,"id":327803,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":5210110,"text":"5210110 - 1976 - Nighttime tests of remote sensors for census of sandhill cranes","interactions":[],"lastModifiedDate":"2012-02-02T00:15:16","indexId":"5210110","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Nighttime tests of remote sensors for census of sandhill cranes","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the International Crane Workshop","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Oklahoma State University","publisherLocation":"Stillwater","usgsCitation":"Munro, R.E., and Lewis, J., 1976, Nighttime tests of remote sensors for census of sandhill cranes, chap. of Proceedings of the International Crane Workshop, p. 304-308.","productDescription":"vi, 355","startPage":"304","endPage":"308","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201244,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4afee4b07f02db69746a","contributors":{"editors":[{"text":"Lewis, James C.","contributorId":76800,"corporation":false,"usgs":true,"family":"Lewis","given":"James","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":506011,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Munro, R. E.","contributorId":75656,"corporation":false,"usgs":true,"family":"Munro","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":327798,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lewis, J. C.","contributorId":10057,"corporation":false,"usgs":true,"family":"Lewis","given":"J. C.","affiliations":[],"preferred":false,"id":327797,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5210152,"text":"5210152 - 1976 - Whooping crane studies at the Patuxent Wildlife Research Center","interactions":[],"lastModifiedDate":"2012-02-02T00:15:21","indexId":"5210152","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Whooping crane studies at the Patuxent Wildlife Research Center","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the International Crane Workshop","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Oklahoma State University","publisherLocation":"Stillwater","usgsCitation":"Erickson, R., 1976, Whooping crane studies at the Patuxent Wildlife Research Center, chap. of Proceedings of the International Crane Workshop, p. 166-176.","productDescription":"vi, 355","startPage":"166","endPage":"176","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201065,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49e1e4b07f02db5e486d","contributors":{"editors":[{"text":"Lewis, James C.","contributorId":76800,"corporation":false,"usgs":true,"family":"Lewis","given":"James","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":506064,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Erickson, R.C.","contributorId":22032,"corporation":false,"usgs":true,"family":"Erickson","given":"R.C.","email":"","affiliations":[],"preferred":false,"id":327861,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":5210157,"text":"5210157 - 1976 - Mortality in captive sandhill cranes at the Patuxent Wildlife Research Center, 1966-1975","interactions":[],"lastModifiedDate":"2015-05-18T10:47:09","indexId":"5210157","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Mortality in captive sandhill cranes at the Patuxent Wildlife Research Center, 1966-1975","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the International Crane Workshop","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Oklahoma State University","publisherLocation":"Stillwater","usgsCitation":"Carpenter, J.W., Locke, L.N., and Miller, J., 1976, Mortality in captive sandhill cranes at the Patuxent Wildlife Research Center, 1966-1975, chap. of Proceedings of the International Crane Workshop, p. 268-283.","productDescription":"vi, 355","startPage":"268","endPage":"283","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":195827,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Maryland","otherGeospatial":"Patuxent Wildlife Research Center","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -76.80679321289062,\n 39.095829711356934\n ],\n [\n -76.77520751953125,\n 39.09090021130993\n ],\n [\n -76.76130294799805,\n 39.09636260964081\n ],\n [\n -76.72353744506835,\n 39.08970109162804\n ],\n [\n -76.72061920166016,\n 39.08370518740625\n ],\n [\n -76.71821594238281,\n 39.072244930479926\n ],\n [\n -76.73023223876953,\n 39.06038293728521\n ],\n [\n -76.73967361450195,\n 39.04158626095001\n ],\n [\n -76.74619674682617,\n 39.03585294580961\n ],\n [\n -76.74310684204102,\n 39.0242515598362\n ],\n [\n -76.74379348754883,\n 39.01491572891582\n ],\n [\n -76.7479133605957,\n 39.01398207802642\n ],\n [\n -76.75237655639648,\n 39.0155826148614\n ],\n [\n -76.74980163574219,\n 39.02345139405932\n ],\n [\n -76.75666809082031,\n 39.02358475565108\n ],\n [\n -76.7588996887207,\n 39.029852466679316\n ],\n [\n -76.75443649291991,\n 39.03451955003222\n ],\n [\n -76.76336288452148,\n 39.03291944188841\n ],\n [\n -76.77486419677734,\n 39.02745213237458\n ],\n [\n -76.77864074707031,\n 39.02385147807989\n ],\n [\n -76.7805290222168,\n 39.02105084238814\n ],\n [\n -76.78653717041016,\n 39.02225112841254\n ],\n [\n -76.79718017578125,\n 39.017583234963475\n ],\n [\n -76.7999267578125,\n 39.01278165162776\n ],\n [\n -76.80267333984375,\n 39.01451559432973\n ],\n [\n -76.8028450012207,\n 39.008780083138426\n ],\n [\n -76.8025016784668,\n 39.00571206064288\n ],\n [\n -76.81039810180664,\n 39.006779213995024\n ],\n [\n -76.82241439819336,\n 39.01291503334495\n ],\n [\n -76.81211471557617,\n 39.015182484048744\n ],\n [\n -76.8193244934082,\n 39.02878566149626\n ],\n [\n -76.82825088500977,\n 39.02731877807868\n ],\n [\n -76.83116912841797,\n 39.033319472320926\n ],\n [\n -76.82498931884766,\n 39.03611962194588\n ],\n [\n -76.83511734008789,\n 39.04078629141699\n ],\n [\n -76.83048248291016,\n 39.043052848234844\n ],\n [\n -76.8277359008789,\n 39.04265287290379\n ],\n [\n -76.82584762573242,\n 39.04505269092206\n ],\n [\n -76.82722091674805,\n 39.047985691121234\n ],\n [\n -76.8244743347168,\n 39.051585115825645\n ],\n [\n -76.8299674987793,\n 39.05984976718806\n ],\n [\n -76.83185577392578,\n 39.06758033951232\n ],\n [\n -76.83151245117188,\n 39.07064567687785\n ],\n [\n -76.80679321289062,\n 39.095829711356934\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b03e4b07f02db698e01","contributors":{"editors":[{"text":"Lewis, James C.","contributorId":76800,"corporation":false,"usgs":true,"family":"Lewis","given":"James","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":506070,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Carpenter, J. W.","contributorId":81854,"corporation":false,"usgs":true,"family":"Carpenter","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":327869,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Locke, L. N.","contributorId":73539,"corporation":false,"usgs":true,"family":"Locke","given":"L.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":327868,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Miller, J.C.","contributorId":69166,"corporation":false,"usgs":true,"family":"Miller","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":327867,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":5210200,"text":"5210200 - 1976 - Summary of recent information regarding effects of PCBs on birds and mammals","interactions":[],"lastModifiedDate":"2012-02-02T00:15:13","indexId":"5210200","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1976","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Summary of recent information regarding effects of PCBs on birds and mammals","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"National conference on Polychlorinated Biphenys","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"U.S. Environmental Protection Agency.","usgsCitation":"Stendell, R., 1976, Summary of recent information regarding effects of PCBs on birds and mammals, chap. of National conference on Polychlorinated Biphenys, p. 262-267.","productDescription":"xv, 471","startPage":"262","endPage":"267","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":196015,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db699e65","contributors":{"authors":[{"text":"Stendell, Rey C.","contributorId":82263,"corporation":false,"usgs":true,"family":"Stendell","given":"Rey C.","affiliations":[],"preferred":false,"id":327953,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":5200353,"text":"5200353 - 1976 - Wildlife Abstracts, 1961-1970: A bibliography and index of the abstracts and citations in Wildlife Review numbers 101-140","interactions":[],"lastModifiedDate":"2012-02-02T00:15:21","indexId":"5200353","displayToPublicDate":"2009-06-08T16:49:39","publicationYear":"1976","noYear":false,"publicationType":{"id":4,"text":"Book"},"title":"Wildlife Abstracts, 1961-1970: A bibliography and index of the abstracts and citations in Wildlife Review numbers 101-140","language":"English","publisher":"U.S. Fish and Wildlife Service","publisherLocation":"Washington, DC","usgsCitation":"Rummel, L., Lee, G., and Franklin, A., 1976, Wildlife Abstracts, 1961-1970: A bibliography and index of the abstracts and citations in Wildlife Review numbers 101-140, viii, 994.","productDescription":"viii, 994","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":200987,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49f4e4b07f02db5f0270","contributors":{"authors":[{"text":"Rummel, L.H.","contributorId":94766,"corporation":false,"usgs":true,"family":"Rummel","given":"L.H.","affiliations":[],"preferred":false,"id":327593,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, G.R.","contributorId":74849,"corporation":false,"usgs":true,"family":"Lee","given":"G.R.","email":"","affiliations":[],"preferred":false,"id":327592,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Franklin, A.H. (compiler)","contributorId":49083,"corporation":false,"usgs":true,"family":"Franklin","given":"A.H.","suffix":"(compiler)","email":"","affiliations":[],"preferred":false,"id":327591,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70162512,"text":"70162512 - 1976 - Trace-metal variation in soils and sagebrush in the Powder River Basin, Wyoming and Montana","interactions":[],"lastModifiedDate":"2016-01-25T18:37:07","indexId":"70162512","displayToPublicDate":"2008-12-28T04:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Trace-metal variation in soils and sagebrush in the Powder River Basin, Wyoming and Montana","docAbstract":"

A reconnaissance study of 28 trace metals in samples of surface soil (0-2.5 cm deep), subsurface soil (15-20 cm deep), and big sagebrush (Artemisia tridentata) that were collected from the Powder River Basin in Wyoming and Montana indicates that little variation occurs in nature at scales greater than about 35 km. This general lack of broadscale variation suggests that simple summary statistics for these materials could provide basinwide geochemical baselines for use in monitoring secular changes in the local geochemical environment. Samples of big sagebrush near the Dave Johnston Power Plant at the southern edge of the basin exhibit statistically significant reductions of strontium, vanadium, uranium, and selenium eastward from the plant.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Connor, J.J., Keith, J.R., and Anderson, B.M., 1976, Trace-metal variation in soils and sagebrush in the Powder River Basin, Wyoming and Montana: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 49-59.","productDescription":"11 p.","startPage":"49","endPage":"59","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314839,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":314838,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","size":"16.18 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Montana, Wyoming","otherGeospatial":"Powder River Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -108,\n 42\n ],\n [\n -108,\n 47\n ],\n [\n -104.1,\n 47\n ],\n [\n -104.1,\n 42\n ],\n [\n -108,\n 42\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a7556fe4b0b28f1184d89f","contributors":{"authors":[{"text":"Connor, Jon J.","contributorId":21948,"corporation":false,"usgs":true,"family":"Connor","given":"Jon","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":589711,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keith, John R. 0000-0002-4665-227X jkeith@usgs.gov","orcid":"https://orcid.org/0000-0002-4665-227X","contributorId":4252,"corporation":false,"usgs":true,"family":"Keith","given":"John","email":"jkeith@usgs.gov","middleInitial":"R.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":589712,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, Barbara M.","contributorId":75155,"corporation":false,"usgs":true,"family":"Anderson","given":"Barbara","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":589713,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70162518,"text":"70162518 - 1976 - Petrology of the Paloma Valley ring complex, southern California batholith","interactions":[],"lastModifiedDate":"2016-01-25T19:15:30","indexId":"70162518","displayToPublicDate":"2008-12-28T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Petrology of the Paloma Valley ring complex, southern California batholith","docAbstract":"

The Paloma Valley ring complex is one of the numerous plutons that make up the Cretaceous southern California batholith. The complex is composite, consisting of (1) an older, single ring dike and two subsidiary short-arced inner dikes, and (2) a younger set of thin short-arced dikes largely inside the older ring dike. The older ring dike, composed of granodiorite-quartz monzonite, has nearly vertical walls and is elliptical in plan; its long axis (14 km) is oriented west-northwest. It was emplaced in and contains numerous fragments of gabbro. The more than 200 short-arced granitic pegmatite dikes, mainly ranging from 0.2 to 1 m in thickness, define a domal ring dike set with moderately to steeply dipping outer dikes and nearly horizontal inner dikes. The younger dikes cut both the older ring dike and the gabbro. Spatially associated with the younger dikes are bodies of fine-grained granophyre that contain stringers of granitic pegmatite. The granophyre has an Mg content similar to that of the younger ring-dike rock, but contains less K and more Fe. The older ring dike is interpreted to have been magmatically emplaced in an elliptical zone of ring fracturing in gabbro; the magma made room by stoping the denser gabbro with little assimilation. Upon a release of pressure, a set of domal fractures formed, along which volatile-rich magma was emplaced, forming the younger ring dikes. Granophyre resulted from pressure-quenching through a loss of volatiles. Residual volatiles, or volatiles that were introduced later, recrystallized parts of the granophyre and caused the formation of pegmatite stringers.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Morton, D.M., and Bard, A., 1976, Petrology of the Paloma Valley ring complex, southern California batholith: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 83-89.","productDescription":"7 p.","startPage":"83","endPage":"89","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314847,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":314846,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","size":"16.18 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -118.3,\n 33\n ],\n [\n -118.3,\n 34\n ],\n [\n -116.5,\n 34\n ],\n [\n -116.5,\n 33\n ],\n [\n -118.3,\n 33\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a75564e4b0b28f1184d86b","contributors":{"authors":[{"text":"Morton, D. M.","contributorId":54608,"corporation":false,"usgs":true,"family":"Morton","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":589746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bard, A.M.","contributorId":22290,"corporation":false,"usgs":true,"family":"Bard","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":589747,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70162516,"text":"70162516 - 1976 - Age and tectonic significance of volcanic rocks on St. Matthew Island, Bering Sea, Alaska","interactions":[],"lastModifiedDate":"2016-01-25T18:59:17","indexId":"70162516","displayToPublicDate":"2008-12-28T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Age and tectonic significance of volcanic rocks on St. Matthew Island, Bering Sea, Alaska","docAbstract":"

Reconnaissance investigations of the heretofore little known volcanic assemblage on St Matthew Island provide significant information on the tectonic history of the Bering Sea shelf. St. Matthew Island is made up of approximately 500 m of subaerial calc-alkaline volcanic rocks ranging in composition from high-alumina basalt to rhyolite. Four K-Ar analyses of samples from this volcanic sequence give Late Cretaceous ages of 65-77 m.y., and intercalated carbonaceous tuff layers yield Cretaceous pollen assemblages. Along the northeast coast of St. Matthew Island, the volcanic rocks are intruded by granodiorite that gives an early Tertiary K-Ar age of 61 m.y. Correlations with on-land geology in northeast Siberia and marine geophysical data from the western Bering Sea strongly suggest that St. Matthew Island represents a southeastward extension of the Okhotsk-Chukotsk belt, a Cretaceous and early Tertiary volcanic arc that borders the Pacific margin of Siberia for nearly 3,000 km. The apparent continuation of this volcanic arc along the margin of the Bering shelf at least as far east as St. Matthew Island supports suggestions by Burk and by Scholl and others that in late Mesozoic time the Pacific plate margin coincided with the present Bering shelf margin and did not shift to the Aleutian trench until the end of Cretaceous or the beginning of Tertiary time.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Patton, W.W., Lanphere, M.A., Miller, T.P., and Scott, R., 1976, Age and tectonic significance of volcanic rocks on St. Matthew Island, Bering Sea, Alaska: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 67-73.","productDescription":"7 p.","startPage":"67","endPage":"73","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314843,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":314842,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","size":"16.18 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Alaska","otherGeospatial":"Bering Sea, St. Matthew Island","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -172.9083251953125,\n 60.56942751033994\n ],\n [\n -172.89459228515625,\n 60.58696734225869\n ],\n [\n -172.88909912109375,\n 60.604497655208455\n ],\n [\n -172.9412841796875,\n 60.61528081030649\n ],\n [\n -172.98797607421875,\n 60.59505943854488\n ],\n [\n -173.0291748046875,\n 60.58157148491742\n ],\n [\n -173.06488037109375,\n 60.56267888575776\n ],\n [\n -173.0731201171875,\n 60.534319275500465\n ],\n [\n -173.0841064453125,\n 60.508639153551826\n ],\n [\n -173.05389404296875,\n 60.48970392643919\n ],\n [\n -173.0126953125,\n 60.484291829879204\n ],\n [\n -172.97149658203125,\n 60.47346492719931\n ],\n [\n -172.93304443359375,\n 60.455863503213834\n ],\n [\n -172.85064697265625,\n 60.41656438628133\n ],\n [\n -172.760009765625,\n 60.36771313471161\n ],\n [\n -172.70233154296875,\n 60.34461900141174\n ],\n [\n -172.63916015625,\n 60.326947742998414\n ],\n [\n -172.6007080078125,\n 60.31334795477253\n ],\n [\n -172.55950927734375,\n 60.314708188485575\n ],\n [\n -172.50732421875,\n 60.32286840124156\n ],\n [\n -172.41668701171875,\n 60.329667021005825\n ],\n [\n -172.3699951171875,\n 60.32286840124156\n ],\n [\n -172.342529296875,\n 60.306545936453226\n ],\n [\n -172.298583984375,\n 60.28749274926003\n ],\n [\n -172.24090576171875,\n 60.292937650406586\n ],\n [\n -172.19146728515625,\n 60.314708188485575\n ],\n [\n -172.22991943359375,\n 60.326947742998414\n ],\n [\n -172.30682373046872,\n 60.34597793265678\n ],\n [\n -172.35351562499997,\n 60.37042901631508\n ],\n [\n -172.3974609375,\n 60.403001945865476\n ],\n [\n -172.44415283203125,\n 60.40707127161831\n ],\n [\n -172.4798583984375,\n 60.39757538658667\n ],\n [\n -172.55676269531247,\n 60.39757538658667\n ],\n [\n -172.65289306640625,\n 60.42198777960337\n ],\n [\n -172.85064697265625,\n 60.50187784207829\n ],\n [\n -172.89459228515625,\n 60.53837217051857\n ],\n [\n -172.9083251953125,\n 60.56942751033994\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a7553fe4b0b28f1184d7c4","contributors":{"authors":[{"text":"Patton, William W. Jr.","contributorId":107355,"corporation":false,"usgs":true,"family":"Patton","given":"William","suffix":"Jr.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":589740,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lanphere, Marvin A. alder@usgs.gov","contributorId":2696,"corporation":false,"usgs":true,"family":"Lanphere","given":"Marvin","email":"alder@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":589741,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Miller, Thomas P. tmiller@usgs.gov","contributorId":4183,"corporation":false,"usgs":true,"family":"Miller","given":"Thomas","email":"tmiller@usgs.gov","middleInitial":"P.","affiliations":[{"id":121,"text":"Alaska Volcano Observatory","active":false,"usgs":true}],"preferred":false,"id":589742,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Scott, Richard A.","contributorId":14414,"corporation":false,"usgs":true,"family":"Scott","given":"Richard A.","affiliations":[],"preferred":false,"id":589743,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70162511,"text":"70162511 - 1976 - Behavior of trace elements during magmatic processes - A summary of theoretical models and their applications","interactions":[],"lastModifiedDate":"2016-01-25T18:23:27","indexId":"70162511","displayToPublicDate":"2008-12-28T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Behavior of trace elements during magmatic processes - A summary of theoretical models and their applications","docAbstract":"

Progress in understanding the behavior of trace elements during the processes that produce igneous rocks has been made possible by the parallel development of theoretical models to describe that behavior and analytical techniques that permit precise measurement of trace-element concentrations in igneous rocks and minerals. The result of this progress is that trace-element studies may now be used to place strong limits on both the degree of partial melting or fractional crystallization involved in the production of a given magma and the identity and quantity of the residual phases. A summary of quantitative trace-element theory and partition coefficient data for igneous rocks is presented.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Arth, J.G., 1976, Behavior of trace elements during magmatic processes - A summary of theoretical models and their applications: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 41-47.","productDescription":"7 p.","startPage":"41","endPage":"47","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314837,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":314836,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","size":"16.18 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a75543e4b0b28f1184d7cc","contributors":{"authors":[{"text":"Arth, Joseph G.","contributorId":104546,"corporation":false,"usgs":true,"family":"Arth","given":"Joseph","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":589710,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70162517,"text":"70162517 - 1976 - Age and origin of the Darrough Felsite, southern Toiyabe Range, Nevada","interactions":[],"lastModifiedDate":"2016-01-25T19:09:04","indexId":"70162517","displayToPublicDate":"2008-12-28T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Age and origin of the Darrough Felsite, southern Toiyabe Range, Nevada","docAbstract":"

The name Darrough Felsite was originally assigned to a body of fine-grained quartzofeldspathic igneous rock probably greater than 3 km thick that is exposed continuously over 100 km2 in the southern Toiyabe Range of central Nevada. The Darrough was supposed to consist mostly of intrusive rocks of probable Permian age. Reexamination of parts of the Darrough Felsite indicates that it is Tertiary and has no genetic affiliation to pre-Tertiary sedimentary and volcanic rocks of the Toiyabe Range. The Darrough constitutes an enormously thick succession of crystal-lithic tuff, tuff breccia, crystal tuff, and volcanogenic sedimentary breccia and sandstone. The tuffaceous rocks are strongly compacted where ash particles are the dominant constituent but are much less compacted where lithic fragments and crystals constitute a rigid framework. Much of the Darrough Felsite may have undergone extensive siliciflcation, probably as a postcompaction event. Contact relations of the Darrough Felsite indicate that it is younger than pre-Tertiary rocks of the southern Toiyabe Range and the Ophir pluton, here dated at 53.9 m.y. (K-Ar, biotite). Three K-Ar ages of minerals from tuff of the Darrough are 26.1, 22.7, and 22.3 m.y., suggesting a middle Tertiary age. A large dike intruding the Darrough. previously assigned a Jurassic age, gives a K-Ar-biotite age of 29.4 m.y. We tentatively interpret the Darrough Felsite to represent an accumulation of ash and breccia flows in a volcanotectonic depression.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Speed, R.C., and McKee, E., 1976, Age and origin of the Darrough Felsite, southern Toiyabe Range, Nevada: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 75-81.","productDescription":"7 p.","startPage":"75","endPage":"81","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314845,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":314844,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","size":"16.18 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Nevada","otherGeospatial":"Toiyabe Range","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -118,\n 38.5\n ],\n [\n -118,\n 39\n ],\n [\n -117,\n 39\n ],\n [\n -117,\n 38.5\n ],\n [\n -118,\n 38.5\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a7553fe4b0b28f1184d7c2","contributors":{"authors":[{"text":"Speed, R. C.","contributorId":70038,"corporation":false,"usgs":true,"family":"Speed","given":"R.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":589744,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKee, E.H.","contributorId":20736,"corporation":false,"usgs":true,"family":"McKee","given":"E.H.","email":"","affiliations":[],"preferred":false,"id":589745,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70162519,"text":"70162519 - 1976 - Halogen contents of igneous minerals as indicators of magmatic evolution of rocks associated with the Ray porphyry copper deposit, Arizona","interactions":[],"lastModifiedDate":"2022-07-01T14:12:45.761545","indexId":"70162519","displayToPublicDate":"2008-12-28T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Halogen contents of igneous minerals as indicators of magmatic evolution of rocks associated with the Ray porphyry copper deposit, Arizona","docAbstract":"

The contents of Cl, F, and H2O+ (calculated) in some hydrous igneous minerals in intrusive rocks of Laramide age (70-60 m.y.) near Ray, Ariz., appear to be related to the age and the chemistry of the whole-rock samples. Apatite and biotite in younger, more silicic rocks contain more F but less Cl and H2O+ than apatite and biotite in older, more mafic rock; the same relations hold for F and H2O+ in sphene. Correlations of the abundance of Cl, F, and H2O+ in hornblende with rock chemistry and age are not as strong as for apatite, biotite, and sphene; igneous (?) epidote does not contain Cl and F in amounts detectable by electron microprobe analysis. The contents of Cl, F, and H2O+ in whole-rock samples decrease with increasing differentiation index and decreasing age. Data for a single pluton of variable composition mirror the results for a suite of different plutons and dikes. The data are satisfactorily although not exclusively explained by postulating that the melts each contained progressively less Cl, F, and H2O and that the hydrons minerals consumed most of the Cl, F, and H2O in the magmas. The data may also be explained by postulating that (1) the stocks evolved Cl-bearing water during their ascent and crystallization, or that (2) Cl and H2O were concentrated during differentiation of the stocks but the minerals failed to record their buildup. Both alternative explanations find problems with and require special conditions to satisfy field, chemical, and experimental data. If many of the special conditions are not met, a nearby batholithic parent to the stocks is not a favorable source of the mineralized fluids at Ray. Propylitic alteration of biotite results in Cl-poor chlorites and may have provided some Cl to hydrothermal fluids; biotite may have also supplied some F to propylitizing fluids through alteration.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Banks, N.G., 1976, Halogen contents of igneous minerals as indicators of magmatic evolution of rocks associated with the Ray porphyry copper deposit, Arizona: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 91-117.","productDescription":"27 p.","startPage":"91","endPage":"117","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314849,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":314848,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","size":"16.18 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Arizona","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -112,\n 34\n ],\n [\n -112,\n 33\n ],\n [\n -110,\n 33\n ],\n [\n -110,\n 34\n ],\n [\n -112,\n 34\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a75570e4b0b28f1184d8ae","contributors":{"authors":[{"text":"Banks, Norman G.","contributorId":89524,"corporation":false,"usgs":true,"family":"Banks","given":"Norman","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":589748,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70162513,"text":"70162513 - 1976 - The source of hydrothermal solutions at Puerto Maunabo and its bearing on the base-metal-potassium feldspar association in Puerto Rico","interactions":[],"lastModifiedDate":"2018-03-27T14:56:41","indexId":"70162513","displayToPublicDate":"2008-12-28T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"The source of hydrothermal solutions at Puerto Maunabo and its bearing on the base-metal-potassium feldspar association in Puerto Rico","docAbstract":"

A quartz oligoclase porphyry exposed near Puerto Maunabo may provide evidence to further our understanding of the base-metal-potassium feldspar association known to occur in many of the porphyry-type copper deposits of Puerto Rico. The porphyry appears to be a magmatic differentiate on the border of the San Lorenzo batholith that may represent a source of mineralizing hydrothermal solutions. The porphyry intrudes an albitized quartz diorite border phase of the batholith that contains large roof pendants of metavolcanic rock. These roof pendants are mostly metamorphosed to greenschist metamorphic facies, but in the vicinity of Puerto Maunabo south of the porphyry, they reach amphibolite metamorphic facies; north of the porphyry, similar xenolithic lenses of metavolcanic rock appear to have been converted entirely to an oligoclase quartz felsite. The layered albitized quartz felsite has the same composition and texture as irregular veinlets in the albitized quartz diorite and as the groundmass in the porphyry. The K+ ions arid basic ions of Fe+2, Cu+2, Mg+2 apparently were mobilized during final magmatic crystallization and then escaped as hydrothermal solutions that followed open conduits within a zone of structural weakness which also permitted the emplacement of the porphyry. The volcanic rock of Cerro Piedra Hueca, in contact with the albitized quartz diorite, and generally along strike west of the porphyry, has been altered to a quartz sericite rock entirely devoid of mafic silicates. This is the southeasternmost exposure of hydrothermally altered volcanic rock in the regional zone of northwest-trending faults that contains the principal porphyry-type copper deposits of Puerto Rico. The texture, mineralogy, and geologic environment of the porphyry at Puerto Maunabo are similar to those of the ore-bearing porphyries but differ in one important aspect. Most ore-bearing porphyries contain hydrothermal potassium feldspar and reddish-brown biotite intimately associated with the base-metal sulfides. In the porphyry of Puerto Maunabo, potassium feldspar is conspicuously absent, and only a trace of biotite is present; the only sulfide present is pyrite. The physical and chemical environment required to precipitate K+ ions, either as potassium feldspar or biotite, apparently is very similar to that required to precipitate base-metal sulfides. At Puerto Maunabo, these conditions evidently did not prevail, and potassium and the base metals may have been carried in solution to a more favorable environment.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Pease, M.H., 1976, The source of hydrothermal solutions at Puerto Maunabo and its bearing on the base-metal-potassium feldspar association in Puerto Rico: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 61-65.","productDescription":"5 p.","startPage":"61","endPage":"65","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314841,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":314840,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","size":"16.18 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"Puerto Rico","otherGeospatial":"Puerto Maunabo","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -67.203369140625,\n 18.443135757230902\n ],\n [\n -67.1868896484375,\n 18.500447458475094\n ],\n [\n -67.17041015625,\n 18.547324589827422\n ],\n [\n -67.060546875,\n 18.557739984085266\n ],\n [\n -66.917724609375,\n 18.516074596589366\n ],\n [\n -66.76391601562499,\n 18.516074596589366\n ],\n [\n -66.6265869140625,\n 18.516074596589366\n ],\n [\n -66.4947509765625,\n 18.505656663040533\n ],\n [\n -66.37939453125,\n 18.516074596589366\n ],\n [\n -66.2969970703125,\n 18.510865709091387\n ],\n [\n -66.1981201171875,\n 18.510865709091387\n ],\n [\n -66.0772705078125,\n 18.505656663040533\n ],\n [\n -65.972900390625,\n 18.510865709091387\n ],\n [\n -65.8355712890625,\n 18.474399059267128\n ],\n [\n -65.709228515625,\n 18.44834670293207\n ],\n [\n -65.5938720703125,\n 18.41707865866127\n ],\n [\n -65.5499267578125,\n 18.34931174429646\n ],\n [\n -65.5718994140625,\n 18.286734062881187\n ],\n [\n -65.6103515625,\n 18.166730410221938\n ],\n [\n -65.7147216796875,\n 18.1406317223127\n ],\n [\n -65.7861328125,\n 18.03619806341487\n ],\n [\n -65.906982421875,\n 17.95783210227242\n ],\n [\n -66.0498046875,\n 17.926475979176438\n ],\n [\n -66.258544921875,\n 17.895114303749153\n ],\n [\n -66.3134765625,\n 17.926475979176438\n ],\n [\n -66.357421875,\n 17.93170238549813\n ],\n [\n -66.412353515625,\n 17.91602270387768\n ],\n [\n -66.4617919921875,\n 17.95783210227242\n ],\n [\n -66.51123046875,\n 17.95783210227242\n ],\n [\n -66.6046142578125,\n 17.910795834978483\n ],\n [\n -66.67053222656249,\n 17.93170238549813\n ],\n [\n -66.73095703125,\n 17.93170238549813\n ],\n [\n -66.807861328125,\n 17.91602270387768\n ],\n [\n -66.9232177734375,\n 17.889886818625325\n ],\n [\n -66.983642578125,\n 17.91602270387768\n ],\n [\n -67.0440673828125,\n 17.926475979176438\n ],\n [\n -67.115478515625,\n 17.900341634875257\n ],\n [\n -67.2198486328125,\n 17.900341634875257\n ],\n [\n -67.25830078125,\n 17.973508079068797\n ],\n [\n -67.225341796875,\n 18.057089766648634\n ],\n [\n -67.2418212890625,\n 18.1406317223127\n ],\n [\n -67.2418212890625,\n 18.208480196039883\n ],\n [\n -67.2747802734375,\n 18.265869811558154\n ],\n [\n -67.30224609375,\n 18.3336694457713\n ],\n [\n -67.30224609375,\n 18.40665471391906\n ],\n [\n -67.203369140625,\n 18.443135757230902\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a7556ee4b0b28f1184d89a","contributors":{"authors":[{"text":"Pease, M. H. Jr.","contributorId":15213,"corporation":false,"usgs":true,"family":"Pease","given":"M.","suffix":"Jr.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":589714,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70162520,"text":"70162520 - 1976 - Bootstrap window, Elko and Eureka Counties, Nevada","interactions":[],"lastModifiedDate":"2022-07-01T14:14:47.812088","indexId":"70162520","displayToPublicDate":"2008-12-28T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Bootstrap window, Elko and Eureka Counties, Nevada","docAbstract":"

The Bootstrap window in the Roberts Mountains thrust of north-central Nevada contains a 1,500-ft (460-m)- thick autochthonous section of carbonate assemblage rocks. These carbonate rocks include the upper part of the Roberts Mountains Formation and an unnamed limestone of Devonian age. They contain abundant material that must have been deposited in or near a reef. Allochthonous chert and shale of the siliceous assemblage, presumably Ordovician and Silurian in age, are present around the window and in a north-trending graben within the window.

\n

The Paleozoic rocks contain altered dikes, most of which may originally have been granodioritic. The localized recrystallization in the Paleozoic rocks probably occurred during dike emplacement. Sometime after the intrusion; both the dikes and their host rocks were epithermally altered. Some gold has been mined, and relatively high gold values (≥1 ppm) occur in rocks of the siliceous assemblage in and near the northern part of the steep north-trending fault zone on the west side of the graben. Areas of secondary alteration and of high values of silver and mercury are more widespread than the area of high gold values. The highest concentrations of silver and mercury, however, are also found near the same gold-bearing fault zone.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Evans, J.G., and Mullens, T.E., 1976, Bootstrap window, Elko and Eureka Counties, Nevada: Journal of Research of the U.S. Geological Survey, v. 4, no. 1, p. 119-125.","productDescription":"7 p.","startPage":"119","endPage":"125","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314850,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue1/report.pdf","text":"Report","linkFileType":{"id":1,"text":"pdf"},"description":"Report"},{"id":314851,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","county":"Elko Coundy, Eureka County","otherGeospatial":"Roberts Mountains","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117,\n 41.2\n ],\n [\n -117,\n 40\n ],\n [\n -116,\n 40\n ],\n [\n -116,\n 41.2\n ],\n [\n -117,\n 41.2\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a75546e4b0b28f1184d7da","contributors":{"authors":[{"text":"Evans, James G. jevans@usgs.gov","contributorId":2396,"corporation":false,"usgs":true,"family":"Evans","given":"James","email":"jevans@usgs.gov","middleInitial":"G.","affiliations":[],"preferred":true,"id":589749,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mullens, Thomas E.","contributorId":14817,"corporation":false,"usgs":true,"family":"Mullens","given":"Thomas","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":589750,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ]}