{"pageNumber":"4784","pageRowStart":"119575","pageSize":"25","recordCount":184617,"records":[{"id":70014886,"text":"70014886 - 1987 - Shocked quartz in the Cretaceous-Tertiary boundary clays: Evidence for a global distribution","interactions":[],"lastModifiedDate":"2025-09-25T15:11:10.732859","indexId":"70014886","displayToPublicDate":"1987-05-08T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Shocked quartz in the Cretaceous-Tertiary boundary clays: Evidence for a global distribution","docAbstract":"<p><span>Shocked quartz grains displaying planar features were isolated from Cretaceous- Tertiary boundary clays at five sites in Europe, a core from the north-central Pacific Ocean, and a site in New Zealand. At all of these sites, the planar features in the shocked quartz can be indexed to rational crystallographic planes of the quartz lattice. The grains display streaking indicative of shock in x-ray diffraction photographs and also show reduced refractive indices. These characteristic features of shocked quartz at several sites worldwide confirm that an impact event at the Cretaceous-Tertiary boundary distributed ejecta products in an earth-girdling dust cloud, as postulated by the Alvarez impact hypothesis.</span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.236.4802.705","issn":"00368075","usgsCitation":"Bohor, B., Modreski, P., and Foord, E.E., 1987, Shocked quartz in the Cretaceous-Tertiary boundary clays: Evidence for a global distribution: Science, v. 236, no. 4802, p. 705-709, https://doi.org/10.1126/science.236.4802.705.","productDescription":"5 p.","startPage":"705","endPage":"709","costCenters":[],"links":[{"id":226186,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"236","issue":"4802","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8e80e4b08c986b31899c","contributors":{"authors":[{"text":"Bohor, Bruce F.","contributorId":104823,"corporation":false,"usgs":true,"family":"Bohor","given":"Bruce F.","affiliations":[],"preferred":false,"id":369529,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Modreski, P.J.","contributorId":98335,"corporation":false,"usgs":true,"family":"Modreski","given":"P.J.","affiliations":[],"preferred":false,"id":369530,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Foord, Eugene E.","contributorId":96319,"corporation":false,"usgs":true,"family":"Foord","given":"Eugene","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":369528,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70209874,"text":"70209874 - 1987 - The Martian surface","interactions":[],"lastModifiedDate":"2020-05-01T19:57:25.936523","indexId":"70209874","displayToPublicDate":"1987-05-01T14:54:46","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3283,"text":"Reviews of Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"The Martian surface","docAbstract":"<p><span>The past four years have been particularly fruitful for Martian research as the enormous volumes of data collected during the Viking mission became readily available to the general science community, and as reformatting of the remote sensing data into cartographic products made the data more useable. The 1:5,000,000‐scale map series is complete, and 1:2,000,000‐scale controlled mosaics of the entire planet are nearing completion. In addition 1:500,000‐scale mosaics have been prepared of about thirty local areas. A uniform scale, digital imaging data base is in preparation (Batson, 1986), and the infrared data have been reformatted to make it more accessible to the general user (Martin and Kieffer, 1985).</span></p>","language":"English","publisher":"Wiley","doi":"10.1029/RG025i002p00285","usgsCitation":"Carr, M.H., 1987, The Martian surface: Reviews of Geophysics, v. 25, no. 2, p. 285-292, https://doi.org/10.1029/RG025i002p00285.","productDescription":"8 p.","startPage":"285","endPage":"292","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":374439,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-06-14","publicationStatus":"PW","contributors":{"authors":[{"text":"Carr, M. H.","contributorId":84727,"corporation":false,"usgs":true,"family":"Carr","given":"M.","email":"","middleInitial":"H.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":false,"id":788357,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70170505,"text":"70170505 - 1987 - Quantitative studies of biodegradation of petroleum and some model hydrocarbons in ground water and sediment environments: Chapter 20","interactions":[],"lastModifiedDate":"2018-03-05T12:23:39","indexId":"70170505","displayToPublicDate":"1987-05-01T14:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"title":"Quantitative studies of biodegradation of petroleum and some model hydrocarbons in ground water and sediment environments: Chapter 20","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Ground-water quality and agricultural practices","language":"English","publisher":"Lewis Publishers","usgsCitation":"Chang, F., Hult, M.F., and Noben, N., 1987, Quantitative studies of biodegradation of petroleum and some model hydrocarbons in ground water and sediment environments: Chapter 20, chap. <i>of</i> Ground-water quality and agricultural practices, p. 295-318.","productDescription":"24 p.","startPage":"295","endPage":"318","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":320430,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":321361,"type":{"id":15,"text":"Index Page"},"url":"https://www.crcpress.com/Ground-Water-Quality-and-Agricultural-Practices/Fairchild/p/book/9780873710367"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"571b4b33e4b071321fe31cc6","contributors":{"editors":[{"text":"Fairchild, Deborah M.","contributorId":169441,"corporation":false,"usgs":false,"family":"Fairchild","given":"Deborah","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":629666,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Chang, Fu-Hsian","contributorId":168848,"corporation":false,"usgs":false,"family":"Chang","given":"Fu-Hsian","email":"","affiliations":[],"preferred":false,"id":627481,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hult, M. F.","contributorId":29817,"corporation":false,"usgs":true,"family":"Hult","given":"M.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":627482,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Noben, N.N.","contributorId":168849,"corporation":false,"usgs":false,"family":"Noben","given":"N.N.","email":"","affiliations":[],"preferred":false,"id":627483,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70231356,"text":"70231356 - 1987 - Applications of spatial postclassification models","interactions":[],"lastModifiedDate":"2022-05-06T17:46:59.838606","indexId":"70231356","displayToPublicDate":"1987-05-01T12:41:47","publicationYear":"1987","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Applications of spatial postclassification models","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the 21st International Symposium on Remote Sensing of Environment","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"21st International Symposium on Remote Sensing of Environment","conferenceDate":"October 26-30, 1987","conferenceLocation":"Ann Arbor, Michigan, United States","language":"English","publisher":"University of Michigan","usgsCitation":"Fosnight, E.A., 1987, Applications of spatial postclassification models, <i>in</i> Proceedings of the 21st International Symposium on Remote Sensing of Environment, v. 1, Ann Arbor, Michigan, United States, October 26-30, 1987, p. 469-485.","productDescription":"17 p.","startPage":"469","endPage":"485","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":400301,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"1","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Fosnight, Eugene A. 0000-0002-8557-3697 fosnight@usgs.gov","orcid":"https://orcid.org/0000-0002-8557-3697","contributorId":2961,"corporation":false,"usgs":true,"family":"Fosnight","given":"Eugene","email":"fosnight@usgs.gov","middleInitial":"A.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":842370,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70231355,"text":"70231355 - 1987 - Sino-American cooperative studies on applications of remote sensing to surveying and mapping","interactions":[],"lastModifiedDate":"2022-05-06T17:38:50.613309","indexId":"70231355","displayToPublicDate":"1987-05-01T12:31:11","publicationYear":"1987","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Sino-American cooperative studies on applications of remote sensing to surveying and mapping","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the 21st International Symposium on Remote Sensing of Environment","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"21st International Symposium on Remote Sensing of Environment","conferenceDate":"October 26-39, 1987","conferenceLocation":"Ann Arbor, Michigan, United States","language":"English","publisher":"University of Michigan","usgsCitation":"Lauer, D.T., and Liangcai, C., 1987, Sino-American cooperative studies on applications of remote sensing to surveying and mapping, <i>in</i> Proceedings of the 21st International Symposium on Remote Sensing of Environment, v. 1, Ann Arbor, Michigan, United States, October 26-39, 1987, p. 591-595.","productDescription":"5 p.","startPage":"591","endPage":"595","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":400300,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"1","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Lauer, D. T.","contributorId":47907,"corporation":false,"usgs":true,"family":"Lauer","given":"D.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":842368,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liangcai, C.","contributorId":291439,"corporation":false,"usgs":false,"family":"Liangcai","given":"C.","email":"","affiliations":[],"preferred":false,"id":842369,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5223608,"text":"5223608 - 1987 - Delayed maturation, neoteny, and social system differences in two manakins of the genus Chiroxiphia","interactions":[],"lastModifiedDate":"2023-10-26T16:56:14.52313","indexId":"5223608","displayToPublicDate":"1987-05-01T12:19:02","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1598,"text":"Evolution","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Delayed maturation, neoteny, and social system differences in two manakins of the genus <i>Chiroxiphia</i>","title":"Delayed maturation, neoteny, and social system differences in two manakins of the genus Chiroxiphia","docAbstract":"<p><span>Long‐tailed manakins (</span><i>Chiroxiphia linearis</i><span>) and swallow‐tailed manakins (</span><i>C. caudata</i><span>) are closely related, sexually dichromatic, lek‐breeding species in which male mating success is highly skewed. Males of both species delay plumage maturation. Before reaching the definitive state, they wear a sequence of feather coats less conspicuous than that of the adult. Nondefinitive plumages probably enhance male survival in the two species; in&nbsp;</span><i>C. caudata</i><span>&nbsp;they may also enhance breeding success of young males, who may be fully reproductively mature their first year. In&nbsp;</span><i>C. linearis</i><span>&nbsp;testicular development is retarded along with that of plumage, although males may be physiologically capable of breeding prior to the acquisition of the definitive plumage. This difference probably reflects differences in the social systems of the two species. Five hypotheses have been proposed to explain the evolution of delayed plumage maturation. The sexual‐selection, cryptic‐breeder, and winter‐adaptation hypotheses suggest that it functions primarily to enhance survival of young males. The juvenile‐ and female‐mimicry hypotheses emphasize enhancement of immediate mating success. Support is provided for all but the female‐mimicry hypothesis; it is argued that data are more consistent with juvenile mimicry and a neotenic origin of nondefinitive plumages.</span></p>","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1558-5646.1987.tb05825.x","usgsCitation":"Foster, M.S., 1987, Delayed maturation, neoteny, and social system differences in two manakins of the genus Chiroxiphia: Evolution, v. 41, no. 3, p. 547-558, https://doi.org/10.1111/j.1558-5646.1987.tb05825.x.","productDescription":"12 p.","startPage":"547","endPage":"558","numberOfPages":"12","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":199437,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"3","noUsgsAuthors":false,"publicationDate":"2017-05-31","publicationStatus":"PW","scienceBaseUri":"4f4e4abae4b07f02db67215d","contributors":{"authors":[{"text":"Foster, Mercedes S.","contributorId":72088,"corporation":false,"usgs":true,"family":"Foster","given":"Mercedes","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":339063,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70226925,"text":"70226925 - 1987 - Book review of The Stability of Slopes, by E.N. Bromhead, Chapman and Hall, New York, 373. p.","interactions":[],"lastModifiedDate":"2021-12-21T13:54:58.566381","indexId":"70226925","displayToPublicDate":"1987-05-01T07:48:54","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Book review of <i>The Stability of Slopes</i>, by E.N. Bromhead, Chapman and Hall, New York, 373. p.","title":"Book review of The Stability of Slopes, by E.N. Bromhead, Chapman and Hall, New York, 373. p.","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1987)15%3C477c:BR%3E2.0.CO;2","usgsCitation":"Iverson, R.M., 1987, Book review of The Stability of Slopes, by E.N. Bromhead, Chapman and Hall, New York, 373. p.: Geology, v. 15, no. 5, https://doi.org/10.1130/0091-7613(1987)15%3C477c:BR%3E2.0.CO;2.","productDescription":"1 p.","startPage":"477","costCenters":[{"id":157,"text":"Cascades Volcano Observatory","active":false,"usgs":true}],"links":[{"id":393184,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Iverson, Richard M. 0000-0002-7369-3819 riverson@usgs.gov","orcid":"https://orcid.org/0000-0002-7369-3819","contributorId":536,"corporation":false,"usgs":true,"family":"Iverson","given":"Richard","email":"riverson@usgs.gov","middleInitial":"M.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"preferred":true,"id":828811,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70209799,"text":"70209799 - 1987 - Overview of geomagnetism and paleomagnetism, 1983–1986","interactions":[],"lastModifiedDate":"2020-04-29T16:01:30.608223","indexId":"70209799","displayToPublicDate":"1987-04-29T10:47:43","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3283,"text":"Reviews of Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Overview of geomagnetism and paleomagnetism, 1983–1986","docAbstract":"<p><span>Michael Fuller, author of a similar overview four years ago, concluded that “...the next quadrennium promises to be a most interesting one, with plenty to keep us busy.” The 11 review papers that follow support his prediction; research in geomagnetism and paleomagnetism indeed has flourished over the last four years. In this brief overview, I will attempt to summarize what I perceive as important advances during the last quadrennium and to predict where research might lead during the next four years. These observations are seen through the eyes of a very specialized geophysicist; another author undoubtedly would see the past and future much differently.</span></p>","language":"English","publisher":"Wiley","doi":"10.1029/RG025i005p00895","usgsCitation":"Blakely, R.J., 1987, Overview of geomagnetism and paleomagnetism, 1983–1986: Reviews of Geophysics, v. 25, no. 5, p. 895-899, https://doi.org/10.1029/RG025i005p00895.","productDescription":"5 p.","startPage":"895","endPage":"899","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374355,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"5","noUsgsAuthors":false,"publicationDate":"2010-06-15","publicationStatus":"PW","contributors":{"authors":[{"text":"Blakely, Richard J. 0000-0003-1701-5236 blakely@usgs.gov","orcid":"https://orcid.org/0000-0003-1701-5236","contributorId":1540,"corporation":false,"usgs":true,"family":"Blakely","given":"Richard","email":"blakely@usgs.gov","middleInitial":"J.","affiliations":[{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":788074,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70209769,"text":"70209769 - 1987 - Geology of the Mount St. Helens area: Record of discontinuous volcanic and plutonic activity in the Cascade Arc of southern Washington","interactions":[],"lastModifiedDate":"2020-04-24T19:03:36.749267","indexId":"70209769","displayToPublicDate":"1987-04-24T13:46:20","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Geology of the Mount St. Helens area: Record of discontinuous volcanic and plutonic activity in the Cascade Arc of southern Washington","docAbstract":"<p><span>The Quaternary edifice of Mount St. Helens volcano was built upon a deeply eroded terrane of gently folded and altered volcanic and plutonic rocks that represent the core of the Tertiary Cascade magmatic arc. These rocks constitute an east dipping homoclinal sequence, several kilometers thick, of subaerially erupted mafic to silicic flows and volcaniclastic strata; K‐Ar ages from this section range from about 28 to 23 Ma (late Oligocene and earliest Miocene), which corresponds to an apparent lull in Cascade volcanism to the north of Mount Rainier. Volcanism was essentially continuous during this period of time, and neither a well‐defined base nor top of the section is exposed within the mapped area. Basalt and basaltic andesite dominate the lower part of the mid‐Tertiary section, whereas andesitic and dacitic rocks comprise most of the upper part. This section was intruded by numerous mafic to silicic dikes, sills, and irregular plutonic bodies, most no more than a few million years younger than their host rocks, and subjected to pervasive burial metamorphism and widespread hydrothermal alteration. Large areas of hornfelsed rock surrounding even relatively small intrusions indicate that the proportion of plutonic rock becomes significantly greater at shallow depth beneath the existing erosion surface. A large granitic pluton intruded the mid‐Tertiary section north of Spirit Lake at about 21 Ma. The Earl porphyry copper deposit occurs within the pluton but appears too young (17 Ma) to be genetically related to it. In contrast to the rather continuous and voluminous Oligocene to early Miocene activity, volcanism since then in the Mount St. Helens area has been localized and Volumetrically minor. Products of three younger eruptive periods have been recognized: a sequence of 15 m.y. old pyroxene andesite flows resting unconformably on mid‐Tertiary strata south of Mount St. Helens, widespread shallow dikes and sills of pyroxene andesite between 10 and 8 m.y. old, and compositionally diverse rocks erupted during the past 3 m.y. The Quaternary lavas are more potassic than the Tertiary lavas and typically contain phenocrysts of hornblende and biotite, which are absent from the older rocks. A number of Tertiary structures define a broad NNE trending zone that may reflect a deep‐seated lithospheric flaw that has controlled the locus of Cascade magmatism in southern Washington for the past 25 m.y. Mount St. Helens lies within this zone at the intersection of the NNW striking St. Helens seismic zone (SHZ) and an ENE trending alignment of Pleistocene silicic plug‐domes. No surface breakage has been detected along the SHZ, which is apparently very young. The linear zone of silicic vents is probably controlled by a fault that has been interpreted from seismic records to occur directly beneath the volcano. This zone parallels the directions of regional maximum horizontal compressive stress and North America/Juan de Fuca plate convergence. Mount St. Helens is an example of a low‐volume tectonically controlled magmatic system in an early stage of development.</span></p>","language":"English","publisher":"Wiley","doi":"10.1029/JB092iB10p10155","usgsCitation":"Evarts, R.C., Ashley, R.P., and Smith, J., 1987, Geology of the Mount St. Helens area: Record of discontinuous volcanic and plutonic activity in the Cascade Arc of southern Washington: Journal of Geophysical Research B: Solid Earth, v. 92, no. B10, p. 10155-10169, https://doi.org/10.1029/JB092iB10p10155.","productDescription":"15 p.","startPage":"10155","endPage":"10169","costCenters":[],"links":[{"id":374268,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Washington","otherGeospatial":"Mount St. Helens Area","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.75048828124999,\n              47.15984001304432\n            ],\n            [\n              -122.56347656249999,\n              46.51351558059737\n            ],\n            [\n              -122.40966796874999,\n              46.01222384063236\n            ],\n            [\n              -121.75048828124999,\n              45.874712248904764\n            ],\n            [\n              -120.69580078125001,\n              46.800059446787316\n            ],\n            [\n              -120.673828125,\n              47.234489635299184\n            ],\n            [\n              -121.17919921875001,\n              47.264320080254805\n            ],\n            [\n              -121.75048828124999,\n              47.15984001304432\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"92","issue":"B10","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Evarts, Russell C. revarts@usgs.gov","contributorId":1974,"corporation":false,"usgs":true,"family":"Evarts","given":"Russell","email":"revarts@usgs.gov","middleInitial":"C.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":787936,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ashley, Roger P. ashley@usgs.gov","contributorId":2749,"corporation":false,"usgs":true,"family":"Ashley","given":"Roger","email":"ashley@usgs.gov","middleInitial":"P.","affiliations":[],"preferred":true,"id":787937,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, J.G.","contributorId":224359,"corporation":false,"usgs":false,"family":"Smith","given":"J.G.","email":"","affiliations":[],"preferred":false,"id":787938,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014695,"text":"70014695 - 1987 - Remote sensing of the Fram Strait marginal ice zone","interactions":[],"lastModifiedDate":"2025-09-25T15:39:31.221069","indexId":"70014695","displayToPublicDate":"1987-04-24T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Remote sensing of the Fram Strait marginal ice zone","docAbstract":"<p><span>Sequential remote sensing images of the Fram Strait marginal ice zone played a key role in elucidating the complex interactions of the atmosphere, ocean, and sea ice. Analysis of a subset of these images covering a 1-week period provided quantitative data on the mesoscale ice morphology, including ice edge positions, ice concentrations, floe size distribution, and ice kinematics. The analysis showed that, under light to moderate wind conditions, the morphology of the marginal ice zone reflects the underlying ocean circulation. High-resolution radar observations showed the location and size of ocean eddies near the ice edge. Ice kinematics from sequential radar images revealed an ocean eddy beneath the interior pack ice that was verified by in situ oceanographic measurements.</span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.236.4800.429","issn":"00368075","usgsCitation":"Shuchman, R., Burns, B., Johannessen, O., Josberger, E., Campbell, W.J., Manley, T., and Lannelongue, N., 1987, Remote sensing of the Fram Strait marginal ice zone: Science, v. 236, no. 4800, p. 429-431, https://doi.org/10.1126/science.236.4800.429.","productDescription":"3 p.","startPage":"429","endPage":"431","costCenters":[],"links":[{"id":225332,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"236","issue":"4800","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa708e4b0c8380cd851b0","contributors":{"authors":[{"text":"Shuchman, R.A.","contributorId":27204,"corporation":false,"usgs":true,"family":"Shuchman","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":369021,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burns, B.A.","contributorId":91249,"corporation":false,"usgs":true,"family":"Burns","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":369026,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johannessen, O.M.","contributorId":30766,"corporation":false,"usgs":true,"family":"Johannessen","given":"O.M.","email":"","affiliations":[],"preferred":false,"id":369022,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Josberger, E.G.","contributorId":61161,"corporation":false,"usgs":true,"family":"Josberger","given":"E.G.","email":"","affiliations":[],"preferred":false,"id":369025,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Campbell, W. J.","contributorId":8614,"corporation":false,"usgs":true,"family":"Campbell","given":"W.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":369020,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Manley, T.O.","contributorId":36300,"corporation":false,"usgs":true,"family":"Manley","given":"T.O.","email":"","affiliations":[],"preferred":false,"id":369023,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lannelongue, N.","contributorId":58031,"corporation":false,"usgs":true,"family":"Lannelongue","given":"N.","email":"","affiliations":[],"preferred":false,"id":369024,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70185922,"text":"70185922 - 1987 - Increased solubility of quartz in water due to complexing by organic compounds","interactions":[],"lastModifiedDate":"2020-01-18T10:43:05","indexId":"70185922","displayToPublicDate":"1987-04-22T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Increased solubility of quartz in water due to complexing by organic compounds","docAbstract":"<p>Quartz is the most stable natural solid phase of silica. It weathers extremely slowly at the Earth's surface<sup>1</sup>, and often resists weathering even after all other silicate minerals have been degraded. However, there is ample evidence from both ancient and modern environments indicating enhanced dissolution and mobility of silica under conditions that cannot easily be explained by the inorganic controls of quartz solubility<sup>2</sup>. Increased solubility of quartz has been observed particularly in soils rich in organic material; however, no direct link between dissolved organic carbon and dissolved silica has been identified<sup>3</sup>. Here we present evidence for an increase in the solubility of quartz in a natural water brought about by dissolved organic compounds. These compounds were produced by the biodegradation of petroleum, and consist largely of a complex mixture of organic acids. We propose that silica is being complexed and mobilized by these organic acids in waters having close to neutral <i>p</i>H.</p>","language":"English","publisher":"Nature Publishing Group","doi":"10.1038/326684a0","usgsCitation":"Bennett, P., and Siegel, D.I., 1987, Increased solubility of quartz in water due to complexing by organic compounds: Nature, v. 326, p. 684-686, https://doi.org/10.1038/326684a0.","productDescription":"3 p. ","startPage":"684","endPage":"686","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338659,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"326","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58dcc822e4b02ff32c68575c","contributors":{"authors":[{"text":"Bennett, P.","contributorId":189730,"corporation":false,"usgs":false,"family":"Bennett","given":"P.","email":"","affiliations":[],"preferred":false,"id":687097,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Siegel, D. I.","contributorId":77562,"corporation":false,"usgs":true,"family":"Siegel","given":"D.","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":687098,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":1003457,"text":"1003457 - 1987 - Comparative efficacy of 16 anesthetic chemicals on rainbow trout","interactions":[],"lastModifiedDate":"2025-03-31T16:09:56.646918","indexId":"1003457","displayToPublicDate":"1987-04-03T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Comparative efficacy of 16 anesthetic chemicals on rainbow trout","docAbstract":"Presently there are no legally registered fish anesthetics that allow for the release of fish or use of the fish for food soon after they have been anesthetized. MS-222 (tricaine), the only anesthetic registered for use on fish in the United States, cannot be used within 21 d of harvesting the fish for food. As the start in a search for an anesthetic that can be used with little or no withdrawal period, we tested the efficacy of 16 chemicals as anesthetics on rainbow trout Salmo gairdneri. Efficacy was defined by the fish (1) becoming handleable (quiet enough to be manipulated and handled readily) in 3 min or less, (2) recovering in 10 min or less, and (3) showing no mortality after 15 min in the anesthetic solution. Four chemicals--MS-222, quinaldine sulfate, benzocaine, and 2-phenoxyethanol--met these criteria for efficacy. Chemicals that yielded excessive induction or recovery times or caused excessive mortality were methylpentynol, chlorobutanol, etomidate, metomidate, Piscaine, propanidid, carbon dioxide, nicotine, salt, Halothane, Metofane, and Biotal. Because carbon dioxide leaves no residues and requires no withdrawal period, it may be an acceptable alternative for fishery workers who can tolerate somewhat shallower anesthesia and longer induction and recovery times.","language":"English","publisher":"Wiley","doi":"10.1577/1548-8659(1987)7<288:CEOACO>2.0.CO;2","usgsCitation":"Gilderhus, P., and Marking, L.L., 1987, Comparative efficacy of 16 anesthetic chemicals on rainbow trout: North American Journal of Fisheries Management, v. 7, no. 2, p. 288-292, https://doi.org/10.1577/1548-8659(1987)7<288:CEOACO>2.0.CO;2.","productDescription":"5 p.","startPage":"288","endPage":"292","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":134493,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae517","contributors":{"authors":[{"text":"Gilderhus, P.A.","contributorId":60156,"corporation":false,"usgs":true,"family":"Gilderhus","given":"P.A.","affiliations":[],"preferred":false,"id":313303,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marking, L. L.","contributorId":90661,"corporation":false,"usgs":true,"family":"Marking","given":"L.","middleInitial":"L.","affiliations":[],"preferred":false,"id":313304,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70209544,"text":"70209544 - 1987 - Arabian Shield ophiolites and Late Proterozoic microplate accretion","interactions":[],"lastModifiedDate":"2020-09-01T20:34:32.121079","indexId":"70209544","displayToPublicDate":"1987-04-01T10:42:57","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Arabian Shield ophiolites and Late Proterozoic microplate accretion","docAbstract":"<p>Fragments of Late Proterozoic ocean crust and mantle (ophiolites) occur within six major fault zones that mark sutures between crustal blocks (microplates) that were accreted between about 630 and 715 Ma to form the Arabian Shield. We report new U-Pb zircon ages for ophiolitic gabbro, diorite, and plagiogranite that range from 840 to 700 Ma and establish these complexes among the oldest proven ophiolites.</p><p>By dating the ophiolitic rocks we are able to monitor the magmatic ages of sea-floor spreading events during accretion of the Arabian Shield. Comparison of the ophiolitic dates with the ages of the adjacent crustal blocks provides a more complete basis for plate-tectonics reconstruction of the shield than has previously been possible. Our new zircon ages confirm earlier Sm-Nd mineral isochrons for ophiolites of the northwestern Arabian Shield, show that the ophiolites are among the oldest oceanic rocks in each terrane, support near- or within-arc tectonic settings for the ophiolites, suggest that the Bir Umq suture extends north along the Nabitah mobile belt into the northern shield, and suggest that older (&gt;1250 Ma) continental crustal material is locally present in the dominantly “oceanic” western shield. We suggest that Indonesia and Alaska provide Phanerozoic analogues for stages in the accretion history.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1987)15<320:ASOALP>2.0.CO;2","usgsCitation":"Pallister, J.S., Stacey, J.S., Fischer, L.B., and Premo, W.R., 1987, Arabian Shield ophiolites and Late Proterozoic microplate accretion: Geology, v. 15, no. 4, p. 20-323, https://doi.org/10.1130/0091-7613(1987)15<320:ASOALP>2.0.CO;2.","productDescription":"4 p.","startPage":"20","endPage":"323","costCenters":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"links":[{"id":373910,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Saudi Arabia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              35.15625,\n              17.936928637549443\n            ],\n            [\n              46.05468749999999,\n              17.936928637549443\n            ],\n            [\n              46.05468749999999,\n              28\n            ],\n            [\n              35.15625,\n              28\n            ],\n            [\n              35.15625,\n              17.936928637549443\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"15","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Pallister, John S. 0000-0002-2041-2147 jpallist@usgs.gov","orcid":"https://orcid.org/0000-0002-2041-2147","contributorId":2024,"corporation":false,"usgs":true,"family":"Pallister","given":"John","email":"jpallist@usgs.gov","middleInitial":"S.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":786745,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stacey, J. S.","contributorId":72785,"corporation":false,"usgs":true,"family":"Stacey","given":"J.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":786746,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fischer, L. B.","contributorId":107293,"corporation":false,"usgs":true,"family":"Fischer","given":"L.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":786747,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Premo, Wayne R. 0000-0001-9904-4801 wpremo@usgs.gov","orcid":"https://orcid.org/0000-0001-9904-4801","contributorId":1697,"corporation":false,"usgs":true,"family":"Premo","given":"Wayne","email":"wpremo@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":true,"id":786748,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70121360,"text":"70121360 - 1987 - Transponders as permanent identification markers for domestic ferrets, black-footed ferrets, and other wildlife","interactions":[],"lastModifiedDate":"2014-08-21T10:12:07","indexId":"70121360","displayToPublicDate":"1987-04-01T10:07:19","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Transponders as permanent identification markers for domestic ferrets, black-footed ferrets, and other wildlife","docAbstract":"A 0.05-g transponder implanted subcutaneously was tested to see if it provided a reliable identification method.  In laboratory tests 20 domestic ferrets (<i>Mustela putorius furo</i>) received transponders and were monitored for a minimum of 6 months.  None showed signs of inflammation, and necropsies conducted at the end of the study showed no scar tissue or transponder migration.  Seven of 23 transponders failed during the test because of leakage through the plastic case, and a glass case is now being manufactured that does not have the leakage problem.  During mark-recapture studies in September and October 1985, transponders were implanted in 20 black-footed ferrets (<i>M. nigripes</i>), 11 of which were subsequently recaptured and 9 of which were brought into captivity; none showed signs of inflammation.  Transponders provide a reliable new method for identifying hard-to-mark wildlife with a unique, permanent number than can be read with the animal in-hand or by remote equipment.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wildlife Society","publisherLocation":"Washington, D.C.","doi":"10.2307/3801005","usgsCitation":"Fagerstone, K.A., and Johns, B.E., 1987, Transponders as permanent identification markers for domestic ferrets, black-footed ferrets, and other wildlife: Journal of Wildlife Management, v. 51, no. 2, p. 294-297, https://doi.org/10.2307/3801005.","productDescription":"4 p.","startPage":"294","endPage":"297","numberOfPages":"4","costCenters":[],"links":[{"id":292745,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":292744,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2307/3801005"}],"volume":"51","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53f707e6e4b05ec1f2431c3c","contributors":{"authors":[{"text":"Fagerstone, Kathleen A.","contributorId":86619,"corporation":false,"usgs":true,"family":"Fagerstone","given":"Kathleen","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":498976,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johns, Brad E.","contributorId":19091,"corporation":false,"usgs":true,"family":"Johns","given":"Brad","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":498975,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70210021,"text":"70210021 - 1987 - A transect across the Mesozoic accretionary margin of central California ","interactions":[],"lastModifiedDate":"2020-05-11T14:48:46.784539","indexId":"70210021","displayToPublicDate":"1987-04-01T09:41:28","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"A transect across the Mesozoic accretionary margin of central California ","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1365-246X.1987.tb04395.x","usgsCitation":"Wentworth, C.M., Zoback, M.D., Griscom, A., Jachens, R.C., and Mooney, W.D., 1987, A transect across the Mesozoic accretionary margin of central California : Geophysical Journal International, v. 89, no. 1, p. 105-110, https://doi.org/10.1111/j.1365-246X.1987.tb04395.x.","productDescription":"5 p.","startPage":"105","endPage":"110","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":480076,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.1987.tb04395.x","text":"Publisher Index Page"},{"id":374600,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"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              -122.34374999999999,\n              40.58058466412761\n            ],\n            [\n              -123.04687499999999,\n              40.04443758460856\n            ],\n            [\n              -121.9921875,\n              38.20365531807149\n            ],\n            [\n              -121.11328124999999,\n              36.87962060502676\n            ],\n            [\n              -118.30078125,\n              34.379712580462204\n            ],\n            [\n              -118.564453125,\n              35.96022296929667\n            ],\n            [\n              -122.34374999999999,\n              40.58058466412761\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"89","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Wentworth, Carl M. 0000-0003-2569-569X cwent@usgs.gov","orcid":"https://orcid.org/0000-0003-2569-569X","contributorId":1178,"corporation":false,"usgs":true,"family":"Wentworth","given":"Carl","email":"cwent@usgs.gov","middleInitial":"M.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":788836,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zoback, Mark D.","contributorId":29431,"corporation":false,"usgs":true,"family":"Zoback","given":"Mark","email":"","middleInitial":"D.","affiliations":[],"preferred":true,"id":788837,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Griscom, Andrew","contributorId":23520,"corporation":false,"usgs":true,"family":"Griscom","given":"Andrew","email":"","affiliations":[],"preferred":false,"id":788838,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jachens, Robert C. jachens@usgs.gov","contributorId":1180,"corporation":false,"usgs":true,"family":"Jachens","given":"Robert","email":"jachens@usgs.gov","middleInitial":"C.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":788839,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":788840,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70210020,"text":"70210020 - 1987 - Crustal structure beneath exposed accreted terranes of Southern Alaska ","interactions":[],"lastModifiedDate":"2020-05-11T14:14:59.108554","indexId":"70210020","displayToPublicDate":"1987-04-01T09:08:54","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"Crustal structure beneath exposed accreted terranes of Southern Alaska ","docAbstract":"<p class=\"chapter-para\">The crustal structure beneath the exposed terranes of southern Alaska has been explored using coincident seismic refraction and reflection profiling. A wide-angle reflector at 8-9 km depth, at the base of an inferred low-velocity zone, underlies the Peninsular and Chugach terranes, appears to truncate their boundary, and may represent a horizontal decollement beneath the terranes. The crust beneath the Chugach terrane is characterized by a series of north-dipping paired layers having low and high velocities that may represent subducted slices of oceanic crust and mantle. This layered series may continue northward under the Peninsular terrane. Earthquake locations in the Wrangell Benioff zone indicate that at least the upper two low-high velocity layer pairs are tectonically inactive and that they appear to have been accreted to the base of the continental crust. The refraction data suggest that the Contact fault between two similar terranes, the Chugach and Prince William terranes, is a deeply penetrating feature that separates lower crust (deeper than 10 km) with paired dipping reflectors, from crust without such reflectors.</p>","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1365-246X.1987.tb04390.x","usgsCitation":"Fuis, G.S., Ambos, E.L., Mooney, W.D., Page, R., Fisher, M.A., Brocher, T.M., and Taber, J., 1987, Crustal structure beneath exposed accreted terranes of Southern Alaska : Geophysical Journal International, v. 89, no. 1, p. 73-78, https://doi.org/10.1111/j.1365-246X.1987.tb04390.x.","productDescription":"6 p.","startPage":"73","endPage":"78","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":480077,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.1987.tb04390.x","text":"Publisher Index Page"},{"id":374599,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -163.828125,\n              53.80065082633023\n            ],\n            [\n              -129.375,\n              53.80065082633023\n            ],\n            [\n              -129.375,\n              63.074865690586634\n            ],\n            [\n              -163.828125,\n              63.074865690586634\n            ],\n            [\n              -163.828125,\n              53.80065082633023\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"89","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Fuis, Gary S. 0000-0002-3078-1544 fuis@usgs.gov","orcid":"https://orcid.org/0000-0002-3078-1544","contributorId":2639,"corporation":false,"usgs":true,"family":"Fuis","given":"Gary","email":"fuis@usgs.gov","middleInitial":"S.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":788829,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ambos, E. L.","contributorId":23957,"corporation":false,"usgs":true,"family":"Ambos","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":788830,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":788831,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Page, R.A.","contributorId":40197,"corporation":false,"usgs":true,"family":"Page","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":788832,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"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":788833,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Brocher, Thomas M. 0000-0002-9740-839X brocher@usgs.gov","orcid":"https://orcid.org/0000-0002-9740-839X","contributorId":262,"corporation":false,"usgs":true,"family":"Brocher","given":"Thomas","email":"brocher@usgs.gov","middleInitial":"M.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":788834,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Taber, J.J.","contributorId":14124,"corporation":false,"usgs":true,"family":"Taber","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":788835,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":1001304,"text":"1001304 - 1987 - Spatial relations between sympatric coyotes and red foxes in North Dakota","interactions":[],"lastModifiedDate":"2024-11-15T16:11:24.903262","indexId":"1001304","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Spatial relations between sympatric coyotes and red foxes in North Dakota","docAbstract":"<p>Spatial relations between coyotes (<i>Canis latrans</i>) and red foxes (<i>Vulpes vulpes</i>) on a 360-km2 area in North Dakota were studied during 1977-78. Coyote families occupied large (mean = 61.2 km2), relatively exclusive territories that encompassed about one-half of the study area. Fox families occupied much smaller (mean = 11.9 km2), relatively exclusive, territories that overlapped perimeters of coyote territories and/or encompassed area unoccupied by coyotes. No fox family lived totally within a coyote territory, but 3 fox families lived within the 153.6-km2 home range of an unattached yearling male coyote. Both coyotes and foxes, from families with overlapping territories, tended to use their overlap areas less than was expected by amount of overlap. Encounters between radio-equipped coyotes and foxes from families with overlapping territories occurred less often than was expected by chance. Foxes living near coyotes exhibited considerable tenacity to their territories, and no monitored fox was killed by coyotes during 2,518 fox-days of radio surveillance. A hypothesis for coyote-induced fox population declines, based largely on fox avoidance mechanisms, is presented.</p>","language":"English","publisher":"Wiley","doi":"10.2307/3801004","usgsCitation":"Sargeant, A.B., Allen, S.H., and Hastings, J.O., 1987, Spatial relations between sympatric coyotes and red foxes in North Dakota: Journal of Wildlife Management, v. 51, no. 2, p. 285-293, https://doi.org/10.2307/3801004.","productDescription":"9 p.","startPage":"285","endPage":"293","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":130266,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"North 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,{"id":1007731,"text":"1007731 - 1987 - Role of fire in the seed germination of woody taxa in California chaparral","interactions":[],"lastModifiedDate":"2023-12-18T16:59:19.773546","indexId":"1007731","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Role of fire in the seed germination of woody taxa in California chaparral","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Ecological Society of America","doi":"10.2307/1939275","usgsCitation":"Keeley, J.E., 1987, Role of fire in the seed germination of woody taxa in California chaparral: Ecology, v. 68, p. 434-443, https://doi.org/10.2307/1939275.","productDescription":"10 p.","startPage":"434","endPage":"443","numberOfPages":"10","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":129827,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"68","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ee4b07f02db5fe26b","contributors":{"authors":[{"text":"Keeley, Jon E. 0000-0002-4564-6521 jon_keeley@usgs.gov","orcid":"https://orcid.org/0000-0002-4564-6521","contributorId":1268,"corporation":false,"usgs":true,"family":"Keeley","given":"Jon","email":"jon_keeley@usgs.gov","middleInitial":"E.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":315924,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":1007683,"text":"1007683 - 1987 - Fall and winter foods of northern pintails in the Sacramento Valley, California","interactions":[],"lastModifiedDate":"2024-11-15T16:28:15.156962","indexId":"1007683","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Fall and winter foods of northern pintails in the Sacramento Valley, California","docAbstract":"<p>Food habits of northern pintails (<i>Anas acuta</i>) were investigated on 3 national wildlife refuges in the western portion of the Sacramento Valley, California, from August to March 1979-82. Pintails consumed &gt;97% (aggregate % dry wt) plant food during diurnal foraging on national wildlife refuge rice, summer- irrigated, and summer-dry habitats from August through January. Invertebrate use increased to 28.9-65.6% of the diet in these habitats during February and March. Rice, swamp timothy (<i>Heleochloa schoenoides</i>), flatsedges (<i>Cyperus </i>spp.), common barnyardgrass (<i>Echinochloa crusgalli</i>), southern naiad (<i>Najas guadalupensis</i>), and smartweed (<i>Polygonum</i> spp.) seeds, miscellaneous vegetation, snails (Gastropoda), and midge (Diptera) and water beetle (Coleoptera) larvae were most important. These foods usually were taken proportional to or greater than availability. Rice was the most important food of pintails feeding nocturnally off the refuges in harvested rice fields from October through January (99.7%) and February and March (63%; barnyardgrass formed 31% of the diet). In August and October, some pintails consumed invertebrates or bulrush (<i>Scirpus</i> spp.) seedlings in marshes soon after feeding in refuge rice (Aug) or harvested commercial rice fields (Oct), thereby increasing dietary protein. In late winter, females and males obtained similar (P &gt; 0.05) percentages of invertebrates from refuge habitats. Important dietary seeds and invertebrates contained high protein or metabolizable energy content. Management should maintain adequate seed production in fall and mid-winter and invertebrate biomass in late winter.</p>","language":"English","publisher":"Wiley","doi":"10.2307/3801027","usgsCitation":"Miller, M.R., 1987, Fall and winter foods of northern pintails in the Sacramento Valley, California: Journal of Wildlife Management, v. 51, no. 2, p. 405-415, https://doi.org/10.2307/3801027.","productDescription":"10 p.","startPage":"405","endPage":"415","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":130382,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Sacramento Valley","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -122.0142127494157,\n              39.09196081806161\n            ],\n            [\n              -122.0142127494157,\n              38.41922523871938\n            ],\n            [\n              -121.01979350856463,\n              38.41922523871938\n            ],\n            [\n              -121.01979350856463,\n              39.09196081806161\n            ],\n            [\n              -122.0142127494157,\n              39.09196081806161\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"51","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49ffe4b07f02db5f7ac9","contributors":{"authors":[{"text":"Miller, Michael R.","contributorId":45796,"corporation":false,"usgs":false,"family":"Miller","given":"Michael","email":"","middleInitial":"R.","affiliations":[{"id":12709,"text":"Department of Animal Science, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA","active":true,"usgs":false}],"preferred":false,"id":315847,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5222194,"text":"5222194 - 1987 - Habitat selection and management of the Hawaiian crow","interactions":[],"lastModifiedDate":"2024-11-15T17:15:43.309351","indexId":"5222194","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Habitat selection and management of the Hawaiian crow","docAbstract":"<p>The abundance and range of the Hawaiian crow, or alala, (<i>Corvus hawaiiensis</i>) have decreased drastically since the 1890's. Fewer than 10 breeding pairs remained in the wild in 1985. A sample of 82 nests during 1970-82 were used to determine habitat associations. Two hundred firty-nine alala observations were used to estimate densities occurring in different vegetation types in 1978. Compared to available habitat, more nests and higher bird densities during the breeding season occurred in areas where: (1) canopy cover was &gt; 60%; (2) koa (<i>Acacia koa</i>) and ohia (<i>Metrosideros polymorpha</i>) were dominant species in the crown layer; (3) native plants constituted &gt; 75% of the understory cover; and (4) the elevation was 1,100-1,500 m. Compared to breeding habitat, nonbreeding habitat tended to lie at lower elevations and in wetter forests having the crown layer dominated by ohia but lacking koa. Habitat loss is a major factor underlying the decline of this species although predation on fledgings, avian disease, and shooting also have reduced the population. Remaining key habitat areas have little or no legal protection through zoning and land ownership. Preserves should be established to encompass the location of existing pairs and to assure the provision of optimum breeding habitat and suitable nonbreeding habitat.</p>","language":"English","publisher":"Wiley","doi":"10.2307/3801038","usgsCitation":"Giffen, J.G., Scott, J.M., and Mountainspring, S., 1987, Habitat selection and management of the Hawaiian crow: Journal of Wildlife Management, v. 51, no. 2, p. 485-494, https://doi.org/10.2307/3801038.","productDescription":"10 p.","startPage":"485","endPage":"494","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":198366,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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,{"id":70014851,"text":"70014851 - 1987 - Migration of mid-ocean-ridge volcanic segments","interactions":[],"lastModifiedDate":"2025-06-03T22:53:19.942554","indexId":"70014851","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Migration of mid-ocean-ridge volcanic segments","docAbstract":"<p>The propagation of small-offset volcanic spreading-centre segments along mid-ocean ridge crests may reflect absolute motion of the plate boundary relative to the underlying mesospheric frame. Such a relationship could be caused by a purely vertical flow of the mantle under spreading centres and would have value in constraining past plate motions from non-transform trends generated during along-ridge propagation and in linking the major-element variability of oceanic crust and upper mantle to the bulk composition and temperatures of mantle ascending under mid-ocean ridges.&nbsp;</p>","language":"English","publisher":"Springer Nature","doi":"10.1038/326835a0","issn":"00280836","usgsCitation":"Schouten, H., Dick, H., and Klitgord, K.D., 1987, Migration of mid-ocean-ridge volcanic segments: Nature, v. 326, no. 6116, p. 835-839, https://doi.org/10.1038/326835a0.","productDescription":"5 p.","startPage":"835","endPage":"839","costCenters":[],"links":[{"id":225664,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"326","issue":"6116","noUsgsAuthors":false,"publicationDate":"1987-04-01","publicationStatus":"PW","scienceBaseUri":"505a5708e4b0c8380cd6d9e5","contributors":{"authors":[{"text":"Schouten, Hans","contributorId":86892,"corporation":false,"usgs":true,"family":"Schouten","given":"Hans","email":"","affiliations":[],"preferred":false,"id":369448,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dick, H.J.B.","contributorId":7012,"corporation":false,"usgs":true,"family":"Dick","given":"H.J.B.","email":"","affiliations":[],"preferred":false,"id":369446,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Klitgord, Kim D.","contributorId":82307,"corporation":false,"usgs":true,"family":"Klitgord","given":"Kim","email":"","middleInitial":"D.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":369447,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70015321,"text":"70015321 - 1987 - Water-quality trends in the nation's rivers","interactions":[],"lastModifiedDate":"2025-09-25T15:49:58.028466","indexId":"70015321","displayToPublicDate":"1987-03-27T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Water-quality trends in the nation's rivers","docAbstract":"<p><span>Water-quality records from two nationwide sampling networks now permit nationally consistent analysis of long-term water-quality trends at more than 300 locations on major U.S. rivers. Observed trends in 24 measures of water quality for the period from 1974 to 1981 provide new insight into changes in stream quality that occurred during a time of major changes in both terrestrial and atmospheric influences on surface waters. Particularly noteworthy are widespread decreases in fecal bacteria and lead concentrations and widespread increases in nitrate, chloride, arsenic, and cadmium concentrations. Recorded increases in municipal waste treatment, use of salt on highways, and nitrogen fertilizer application, along with decreases in leaded gasoline consumption and regionally variable trends in coal production and combustion during the period appear to be reflected in water-quality changes.</span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.235.4796.1607","issn":"00368075","usgsCitation":"Smith, R.A., Alexander, R.B., and Wolman, M., 1987, Water-quality trends in the nation's rivers: Science, v. 235, no. 4796, p. 1607-1615, https://doi.org/10.1126/science.235.4796.1607.","productDescription":"9 p.","startPage":"1607","endPage":"1615","costCenters":[],"links":[{"id":223761,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": 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G.","contributorId":39789,"corporation":false,"usgs":true,"family":"Wolman","given":"M. G.","affiliations":[],"preferred":false,"id":370626,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70121508,"text":"70121508 - 1987 - Is courtship intensity a signal of male parental care in Red-winged Blackbirds (<i>Agelaius phoeniceus</i>)?","interactions":[],"lastModifiedDate":"2017-05-13T15:51:10","indexId":"70121508","displayToPublicDate":"1987-03-20T11:15:38","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Is courtship intensity a signal of male parental care in Red-winged Blackbirds (<i>Agelaius phoeniceus</i>)?","docAbstract":"<p>We studied Red-winged Blackbird (<i>Agelaius phoeniceus</i>) behavior in marsh and prairie habitats to determine whether courting males provide cues of their nest defense, whether females prefer males that defend nests vigorously, and whether male nest defense affects nest success. We found no evidence that courtship behavior provides cues of male nest defense, or that females prefer males that court intensely. We found evidence that females nesting in marshes prefer males that defend nests intensely, but no evidence that intensely defending males in the prairie habitat achieve high nest success. We found differences, however, between marsh and prairie habitats that suggest a coarse-grained relationship between male parental quality and female choice of mate in this species.</p>","language":"English","publisher":"American Ornithological Society","usgsCitation":"Yasukawa, K., Knight, R., and Skagen, S.K., 1987, Is courtship intensity a signal of male parental care in Red-winged Blackbirds (<i>Agelaius phoeniceus</i>)?: The Auk, v. 104, p. 628-636.","productDescription":"9 p.","startPage":"628","endPage":"636","costCenters":[],"links":[{"id":292859,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":341249,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://www.jstor.org/stable/4087273 "}],"volume":"104","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53f85967e4b03f038c5c1830","contributors":{"authors":[{"text":"Yasukawa, Ken","contributorId":57382,"corporation":false,"usgs":true,"family":"Yasukawa","given":"Ken","email":"","affiliations":[],"preferred":false,"id":499152,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Knight, Richard L.","contributorId":46014,"corporation":false,"usgs":true,"family":"Knight","given":"Richard L.","affiliations":[],"preferred":false,"id":499151,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Skagen, Susan Knight 0000-0002-6744-1244 skagens@usgs.gov","orcid":"https://orcid.org/0000-0002-6744-1244","contributorId":81811,"corporation":false,"usgs":true,"family":"Skagen","given":"Susan","email":"skagens@usgs.gov","middleInitial":"Knight","affiliations":[],"preferred":false,"id":499153,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70121466,"text":"70121466 - 1987 - Cumulative impacts assessment: an application to Chesapeake Bay","interactions":[],"lastModifiedDate":"2014-08-22T09:32:39","indexId":"70121466","displayToPublicDate":"1987-03-20T09:30:06","publicationYear":"1987","noYear":false,"publicationType":{"id":4,"text":"Book"},"publicationSubtype":{"id":12,"text":"Conference publication"},"title":"Cumulative impacts assessment: an application to Chesapeake Bay","docAbstract":"No abstract available.","largerWorkTitle":"Cumulative impacts assessment: an application to Chesapeake Bay","conferenceTitle":"Cumulative impacts assessment: an application to Chesapeake Bay","conferenceDate":"1987-03-20T00:00:00","conferenceLocation":"Quebec City, Quebec","language":"English","publisher":"Wildlife Management Institute","publisherLocation":"Washington, D.C.","usgsCitation":"Wildlife Management Institute, 1987, Cumulative impacts assessment: an application to Chesapeake Bay, 12 p.","productDescription":"12 p.","numberOfPages":"12","costCenters":[],"links":[{"id":292819,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Chesapeake Bay","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -76.6311,36.9075 ], [ -76.6311,39.5704 ], [ -75.6353,39.5704 ], [ -75.6353,36.9075 ], [ -76.6311,36.9075 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53f85951e4b03f038c5c17c3"}
,{"id":70226739,"text":"70226739 - 1987 - Late Eocene impact microspherules: Stratigraphy, age and geochemistry","interactions":[],"lastModifiedDate":"2021-12-08T16:08:57.995435","indexId":"70226739","displayToPublicDate":"1987-03-01T09:52:30","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2714,"text":"Meteoritics","active":true,"publicationSubtype":{"id":10}},"title":"Late Eocene impact microspherules: Stratigraphy, age and geochemistry","docAbstract":"<p>Recent discoveries of microtektite and related crystal bearing microspherule layers in deep-sea sediments of the west equatorial Pacific DSDP Sites 292, 315A and 462, off-shore New Jersey in Site 612 and in southern Spain have confirmed the presence of at least three microspherule layers in Late Eocene sediments. Moreover, these discoveries have extended the North American strewn field from the Caribbean and Gulf of Mexico region to the northwest Atlantic, and have established a third strewn field in western equatorial Pacific and Indian Ocean which may extend to the Mediterranean.</p><p>Stratigraphically the oldest microspherule layer occurs in the planktonic foraminifer<span>&nbsp;</span><i>Globigerapsis semiinvoluta</i><span>&nbsp;</span>Zone about 0.5 m.y. prior to the closely spaced crystal bearing microspherule layer and North American microtektite layer in the<span>&nbsp;</span><i>Globorotalia cerroazulensis</i><span>&nbsp;</span>Zone. Major element composition of the<span>&nbsp;</span><i>G. semiinvoluta</i><span>&nbsp;</span>Zone layer and the crystal bearing microspherule layer overlap, but there is a clear trend towards higher Al<sub>2</sub>O<sub>3</sub><span>&nbsp;</span>and FeO values in SiO<sub>2</sub><span>&nbsp;</span>equivalent microspherules of the latter layer. The<span>&nbsp;</span><i>G. semiinvoluta</i><span>&nbsp;</span>Zone microspherules also contain a higher percentage of non-crystalline spherules (microtektites) than the crystal bearing microspherule layer, but lower than the North American microtektite layer. Excess iridium due to an abrupt increase in supply is associated with the middle crystal bearing microspherule layer and to a lesser extent with the other two layers. But, Ir excess due to concentration as a result of carbonate loss was also observed at two sites (462, 612).</p><p>The three late Eocene microspherule layers do not precisely coincide with planktonic foraminiferal species extinctions, but a major faunal assemblage change is associated with the<span>&nbsp;</span><i>G. semiinvoluta</i><span>&nbsp;</span>Zone layer. Abundant pyrite is present in the North American microtektite layer of DSDP Site 612 suggesting reducing conditions possibly due to a sudden influx of biologic matter (dead bodies) to the ocean floor, and the crystal bearing microspherule layer coincides with five radiolarian extinctions. All three microspherule layers are associated with decreased carbonate possibly due to sudden productivity changes, increased dissolution as a result of sea-level and climate fluctuations, or the impact events.</p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1945-5100.1987.tb00883.x","usgsCitation":"Keller, G., D’Hondt, S.L., Orth, C.J., Gilmore, J.S., Oliver, P.Q., Shoemaker, E.M., and Molina, E., 1987, Late Eocene impact microspherules: Stratigraphy, age and geochemistry: Meteoritics, v. 22, no. 1, p. 25-60, https://doi.org/10.1111/j.1945-5100.1987.tb00883.x.","productDescription":"36 p.","startPage":"25","endPage":"60","costCenters":[],"links":[{"id":392627,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Spain, United States","state":"New Jersey","otherGeospatial":"Atlantic Ocean, Caribbean Sea, Gulf of Mexico, Pacific Ocean","volume":"22","issue":"1","noUsgsAuthors":false,"publicationDate":"2012-06-15","publicationStatus":"PW","contributors":{"authors":[{"text":"Keller, G.","contributorId":72527,"corporation":false,"usgs":true,"family":"Keller","given":"G.","affiliations":[],"preferred":false,"id":828057,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"D’Hondt, Steven L.","contributorId":82057,"corporation":false,"usgs":false,"family":"D’Hondt","given":"Steven","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":828058,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Orth, C. J.","contributorId":90034,"corporation":false,"usgs":true,"family":"Orth","given":"C.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":828059,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gilmore, J. S.","contributorId":72927,"corporation":false,"usgs":true,"family":"Gilmore","given":"J.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":828060,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Oliver, P. Q.","contributorId":23695,"corporation":false,"usgs":true,"family":"Oliver","given":"P.","email":"","middleInitial":"Q.","affiliations":[],"preferred":false,"id":828061,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shoemaker, Eugene Merle","contributorId":20342,"corporation":false,"usgs":true,"family":"Shoemaker","given":"Eugene","email":"","middleInitial":"Merle","affiliations":[],"preferred":false,"id":828062,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Molina, E.","contributorId":269890,"corporation":false,"usgs":false,"family":"Molina","given":"E.","email":"","affiliations":[],"preferred":false,"id":828063,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
]}