{"pageNumber":"4355","pageRowStart":"108850","pageSize":"25","recordCount":165871,"records":[{"id":70210067,"text":"70210067 - 1987 - Petrology and geochemistry of alkali gabbronorites from Lunar Breccia 67975","interactions":[],"lastModifiedDate":"2020-05-12T21:10:24.500561","indexId":"70210067","displayToPublicDate":"1987-05-12T16:02:50","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":"Petrology and geochemistry of alkali gabbronorites from Lunar Breccia 67975","docAbstract":"<p><span>Clasts of an unusual type of lunar highlands igneous rock, alkali gabbronorite, have been found in Apollo 16 breccia 67975. The alkali gabbronorites form two distinct subgroups, magnesian and ferroan. Modes and bulk compositions are highly varied. The magnesian alkali gabbronorites are composed of bytownitic plagioclase (OrAn), hypersthene (WoEn), augite (WoEn), a silica mineral, and trace Ba‐rich K‐feldspar. The ferroan alkali gabbronorites are composed of ternary plagioclase (OrAn), pigeonite (WoEn), augite (WoEn), Ba‐rich K‐feldspar, and a silica mineral. Trace minerals in both subgroups are apatite, REE‐rich whitlockite, and zircon. The magnesian and ferroan alkali gabbronorites appear to have formed by progressive differentiation of the same, or closely related, parent magmas; the compositional data indicate that these magmas were REE‐rich. The ternary plagioclase is probably a high‐temperature metastable phase formed during crystallization. In composition and mineralogy, the 67975 alkali gabbronorites show many similarities to Apollo 12 and 14 alkali norites, alkali gabbronorites, and alkali anorthosites, and all these rocks together constitute a distinctive alkali suite. In addition, the alkali gabbronorites show some similarities to KREEP basalts, Mg‐norites, and some felsites. These data suggest genetic links between some or all of these types of pristine rocks. Two types of relationships are possible. The first is that alkali‐suite rocks crystallized in plutons of KREEP basalt magma, and KREEP basalts are their extrusive equivalents. The second is that the alkali‐suite rocks and some felsites all crystallized in plutons of Mg‐norite parent magmas, and KREEP basalt magmas formed by remelting of these plutons. Additional studies are needed to resolve which of these hypotheses is correct.</span></p>","language":"English","publisher":"Wiley","doi":"10.1029/JB092iB04p0E314","usgsCitation":"James, O., Lindstrom, M., and Flohr, M., 1987, Petrology and geochemistry of alkali gabbronorites from Lunar Breccia 67975: Journal of Geophysical Research B: Solid Earth, v. 92, no. B4, p. 314-330, https://doi.org/10.1029/JB092iB04p0E314.","productDescription":"17 p.","startPage":"314","endPage":"330","costCenters":[],"links":[{"id":374711,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"92","issue":"B4","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","contributors":{"authors":[{"text":"James, O.B.","contributorId":100526,"corporation":false,"usgs":true,"family":"James","given":"O.B.","email":"","affiliations":[],"preferred":false,"id":788966,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lindstrom, M.M.","contributorId":224652,"corporation":false,"usgs":false,"family":"Lindstrom","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":788967,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Flohr, M.K.","contributorId":80012,"corporation":false,"usgs":true,"family":"Flohr","given":"M.K.","email":"","affiliations":[],"preferred":false,"id":788968,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70210060,"text":"70210060 - 1987 - Colorado Plateau","interactions":[],"lastModifiedDate":"2021-01-28T20:12:01.16041","indexId":"70210060","displayToPublicDate":"1987-05-12T14:17:36","publicationYear":"1987","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"8","title":"Colorado Plateau","docAbstract":"<p>Field studies in the Colorado Plateau occupy an honored place in the development of geomorphic theory. The purpose of this chapter is to briefly review the foundational, regional, and process-oriented studies in the region, and to provide a review of promising threads of inquiry set in a context of more than a century of geomorphologic research in the region.</p><p>The Colorado Plateau has sharply defined boundaries that separate it from neighboring geomorphic provinces (Fig. 1; for details see Thornbury, 1965). On the west, faults and the perimeters of volcanic plateaus mark the boundary between the Colorado Plateau and the Basin and Range Province. The boundary extends across the southern edge of the plateau where it is less radically defined, but is nonetheless visible on the surface in the form of an uplifted edge of sedimentary rocks known as the Mogollon Rim, which extends from northwest Arizona diagonally into north-central New Mexico. The eastern and northern boundaries are delineated by the contact between sedimentary rocks and upthrust or folded crystalline rocks of the Rocky Mountains.</p><p>The plateau is a definable tectonic unit relatively easily separated from other provinces, but it shows considerable internal variation (Fig. 1; for details see Hunt, 1974a). The interior of the kidney-shaped Colorado Plateau Province reveals a series of subsections that depend on geologic and geomorphologic definition. The centrally located Canyon Lands Section is dominated by gently folded sedimentary rocks, while the western High Plateaus Section reveals widespread accumulations of volcanic materials.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Geomorphic systems of North America","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"GSA","doi":"10.1130/DNAG-CENT-v2.259","usgsCitation":"Graf, W.L., Hereford, R., Laity, J., and Young, R.A., 1987, Colorado Plateau, chap. 8 <i>of</i> Geomorphic systems of North America, v. 2, p. 259-302, https://doi.org/10.1130/DNAG-CENT-v2.259.","productDescription":"44 p.","startPage":"259","endPage":"302","costCenters":[],"links":[{"id":374755,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona, Colorado, New Mexico, Utah","otherGeospatial":"Colorado Plateau","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -109.05029296875,\n              32.76880048488168\n            ],\n            [\n              -106.72119140625,\n              33.797408767572485\n            ],\n            [\n              -105.29296874999999,\n              35.62158189955968\n            ],\n            [\n              -105.09521484375,\n              36.474306755095235\n            ],\n            [\n              -105.029296875,\n              37.71859032558816\n            ],\n            [\n              -105.88623046874999,\n              38.048091067457236\n            ],\n            [\n              -106.01806640624999,\n              39.90973623453719\n            ],\n            [\n              -107.20458984375,\n              40.43022363450862\n            ],\n            [\n              -109.9951171875,\n              40.613952441166596\n            ],\n            [\n              -111.68701171875,\n              39.470125122358176\n            ],\n            [\n              -112.587890625,\n              36.96744946416934\n            ],\n            [\n              -113.9501953125,\n              35.55010533588552\n            ],\n            [\n              -113.66455078125,\n              34.542762387234845\n            ],\n            [\n              -109.05029296875,\n              32.76880048488168\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Graf, William L.","contributorId":92415,"corporation":false,"usgs":true,"family":"Graf","given":"William","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":789039,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hereford, Richard 0000-0002-0892-7367 rhereford@usgs.gov","orcid":"https://orcid.org/0000-0002-0892-7367","contributorId":3620,"corporation":false,"usgs":true,"family":"Hereford","given":"Richard","email":"rhereford@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":789040,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Laity, Julie","contributorId":224651,"corporation":false,"usgs":false,"family":"Laity","given":"Julie","email":"","affiliations":[],"preferred":false,"id":789041,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Young, Richard A.","contributorId":38975,"corporation":false,"usgs":true,"family":"Young","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":789042,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70210059,"text":"70210059 - 1987 - Sediment-yield history of a small basin in southern Utah, 1937–1976: Implications for land management and geomorphology","interactions":[],"lastModifiedDate":"2020-05-12T19:14:04.312579","indexId":"70210059","displayToPublicDate":"1987-05-12T14:09:07","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":"Sediment-yield history of a small basin in southern Utah, 1937–1976: Implications for land management and geomorphology","docAbstract":"<p><span>Alluvium deposited in a reservoir from 1937 to 1976 records the sediment-yield history of a small (2.8 km</span><sup>2</sup><span>), high-relief basin in semiarid southern Utah. Stratification in the alluvium shows that sediment was deposited in the reservoir only 21 times in 38 yr, a runoff recurrence interval of 1.8 yr. Thus, on average, the particular combination of rainfall intensity, duration, and antecedent moisture conditions producing runoff did not recur often. On the basis of the volume of beds in the reservoir fill, sediment yield of individual runoff events averaged 2500 m</span><sup>3</sup><span>/km</span><sup>2</sup><span>&nbsp;(5.3 a-ft/mi</span><sup>2</sup><span>) with slightly less than one order of magnitude variation. This low variation is not expected of small basins and probably resulted from limited hillslope sediment supply, suggesting that transport processes were more rapid than weathering processes. Sediment yield, therefore, was evidently controlled by the availability of freshly weathered material.</span></p>","language":"English","publisher":"GSA","doi":"10.1130/0091-7613(1987)15<954:SHOASB>2.0.CO;2","usgsCitation":"Hereford, R., 1987, Sediment-yield history of a small basin in southern Utah, 1937–1976: Implications for land management and geomorphology: Geology, v. 15, no. 10, p. 954-957, https://doi.org/10.1130/0091-7613(1987)15<954:SHOASB>2.0.CO;2.","productDescription":"4 p.","startPage":"954","endPage":"957","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374705,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona, Utah","otherGeospatial":"Southern Utah","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -112.5714111328125,\n              36.721273880045004\n            ],\n            [\n              -111.258544921875,\n              36.721273880045004\n            ],\n            [\n              -111.258544921875,\n              37.15156050223665\n            ],\n            [\n              -112.5714111328125,\n              37.15156050223665\n            ],\n            [\n              -112.5714111328125,\n              36.721273880045004\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"15","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Hereford, Richard 0000-0002-0892-7367 rhereford@usgs.gov","orcid":"https://orcid.org/0000-0002-0892-7367","contributorId":3620,"corporation":false,"usgs":true,"family":"Hereford","given":"Richard","email":"rhereford@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":788951,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70210025,"text":"70210025 - 1987 - Coincident seismic reflection/refraction studies of the continental lithosphere: A global review ","interactions":[],"lastModifiedDate":"2020-05-11T20:56:10.280545","indexId":"70210025","displayToPublicDate":"1987-05-11T15:53:03","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":"Coincident seismic reflection/refraction studies of the continental lithosphere: A global review ","docAbstract":"<p class=\"chapter-para\">Vertical-incidence reflection profiling has identified several characteristic features of the continental lithosphere including a generally transparent upper crust, a reflective lower crust, reflections from the crust-mantle boundary, and a commonly transparent upper mantle. The underlying physical causes of these characteristic features remain poorly understood. This review summarizes additional information brought to bear on the physical properties of these characteristic crustal structures through the use of coincident wide-angle refraction profiling.</p>","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1365-246X.1987.tb04379.x","usgsCitation":"Mooney, W.D., and Brocher, T.M., 1987, Coincident seismic reflection/refraction studies of the continental lithosphere: A global review : Geophysical Journal International, v. 89, no. 1, p. 1-6, https://doi.org/10.1111/j.1365-246X.1987.tb04379.x.","productDescription":"6 p.","startPage":"1","endPage":"6","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":480074,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.1987.tb04379.x","text":"Publisher Index Page"},{"id":374607,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"89","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"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":788848,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"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":788849,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70210024,"text":"70210024 - 1987 - A geologic interpretation of seismic-refraction results in northeastern California ","interactions":[],"lastModifiedDate":"2020-05-11T20:42:56.640536","indexId":"70210024","displayToPublicDate":"1987-05-11T15:37:45","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1723,"text":"GSA Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"A geologic interpretation of seismic-refraction results in northeastern California ","docAbstract":"<p>In 1981, the U.S. Geological Survey conducted a seismic-refraction experiment in northeastern California designed to study the Klamath Mountains, Cascade Range, Modoc Plateau, and Basin and Range provinces. Key profiles include 135-km-long, north-south lines in the Klamath Mountains and Modoc Plateau provinces and a 260-km-long, east-west line crossing all of the provinces.</p><p>The seismic-velocity models for the Klamath and Modoc lines are comparatively homogeneous laterally but are quite different from each other. The Klamath model is finely layered from the surface to at least 14-km depth, consisting of a series of high-velocity layers (6.1–6.7 km/s), ranging in thickness from 1 to 4 km, with alternating positive and negative velocity gradients. A layer with an unreversed velocity of 7.0 km/s extends from 14 km to an unknown depth. The Modoc model, in contrast, is relatively thickly layered and has lower velocities than does the Klamath model at all depths down to 25 km. An upper layer, 4.5 km thick, of low-velocity material (2.1–4.4 km/s) overlies a basement with a considerably higher velocity (6.2 km/s). Velocity increases slowly with depth, with a small velocity step (to 6.4 km/s) at 11 km and a 7.0-km/s layer beginning at 25-km depth. Moho is probably 38–45 km deep under the Modoc Plateau, but its depth is unknown under the Klamath Mountains. A combined velocity-density model for the east-west line consists of a western part similar in configuration to the Klamath velocity model, an eastern part similar to the Modoc velocity model, and laterally changing velocity-density structure in between, in the Cascade Range.</p><p>Beneath its upper layer, the velocity model for the Modoc Plateau is similar to that determined by other researchers for the adjacent Sierra Nevada. The velocity model is unlike those for rift areas, to which the Modoc Plateau has been compared by some authors. We theorize that beneath a veneer of volcanic and sedimentary rocks (the upper layer), the Modoc Plateau is underlain by a basement of granitic and metamorphic rocks that, like rocks in the Sierra Nevada, are the roots of one or more magmatic arcs.</p><p>The fine layering in the Klamath seismic-velocity model is consistent with the geologic structure of the Klamath Mountains, characterized by imbricate thrusting of oceanic rock layers of various compositions and ages. Independent modeling of aeromagnetic data indicates that the base of the Trinity ultramafic sheet, the second major rock layer down in the structural sequence, corresponds to a velocity step to 6.7 km/s at 7-km depth in our model. The 6.7-km/s layer beneath the Trinity ultramafic sheet apparently corresponds to rocks of the central metamorphic belt, which are mafic schists. Rock units structurally deeper than rocks of the central metamorphic belt can be correlated with velocity layers below the 6.7-km/s layer, but with less certainty.</p><p>In the model for the east-west line, the region of laterally changing velocity structure beneath the Cascade Range includes a 10-km step down to the east in the top of the 7.0-km/s layer. This region of lateral velocity change we interpret to be a fault, fold, or intrusive contact (or some combination of the three) between the stack of oceanic rock layers that underlie the Klamath Mountains and the buried roots of magmatic arcs inferred to underlie the Modoc Plateau. Magmas forming the modern Cascade Range arc apparently rise through this region.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1987)98<53:AGIOSR>2.0.CO;2","usgsCitation":"Fuis, G.S., Zucca, J., Mooney, W.D., and Milkereit, B., 1987, A geologic interpretation of seismic-refraction results in northeastern California : GSA Bulletin, v. 98, no. 1, p. 53-65, https://doi.org/10.1130/0016-7606(1987)98<53:AGIOSR>2.0.CO;2.","productDescription":"13 .p.","startPage":"53","endPage":"65","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":374606,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Northeastern California","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -123.26660156249999,\n              38.34165619279595\n            ],\n            [\n              -119.88281249999999,\n              38.34165619279595\n            ],\n            [\n              -119.88281249999999,\n              42.22851735620852\n            ],\n            [\n              -123.26660156249999,\n              42.22851735620852\n            ],\n            [\n              -123.26660156249999,\n              38.34165619279595\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"98","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":788844,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zucca, J.J.","contributorId":104914,"corporation":false,"usgs":true,"family":"Zucca","given":"J.J.","affiliations":[],"preferred":false,"id":788845,"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":788846,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Milkereit, Bernd","contributorId":62752,"corporation":false,"usgs":false,"family":"Milkereit","given":"Bernd","affiliations":[],"preferred":false,"id":788847,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70247997,"text":"70247997 - 1987 - Evidence for a shallow pluton beneath the Goat Rocks Wilderness, Washington, from gravity and magnetic data","interactions":[],"lastModifiedDate":"2023-08-30T18:29:17.509437","indexId":"70247997","displayToPublicDate":"1987-05-10T13:10:21","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":"Evidence for a shallow pluton beneath the Goat Rocks Wilderness, Washington, from gravity and magnetic data","docAbstract":"<p><span>A gravity and aeromagnetic study was conducted in and adjacent to the Goat Rocks Wilderness area, Washington. This work was done in conjunction with geologic and geochemical studies which were critically important to our interpretation. The Bouguer gravity anomaly map displays a large central positive gravity anomaly and three superimposed smaller positive anomalies. The main anomaly, about 26 by 11 km with an amplitude of about 16 mGal seems to delineate a dense large pluton or sheeted dike complex intruding less dense, older volcanic and sedimentary rocks lying directly below the volcano. The pluton or sheeted dike complex may have fed the Goat Rocks volcano throughout its 1–2 m.y. history. Three small feeders, mapped on the surface as andesite intrusions, may be the cause of three smaller gravity anomalies superimposed on the main anomaly. The magnetic anomaly maps also exhibit a large central anomaly whose source is the Goat Rocks pluton. The magnetic data suggest that the three shallow intrusive cupolas have undergone a significant amount of hydrothermal alteration. In addition, to some extent the magnetic data reflect the terrain of the area. Topographic highs produce magnetic highs, and topographic lows produce magnetic lows. The deviations from this pattern delineate subsurface geology. Magnetic lows may be of particular interest in locating zones of mineralization where magnetic minerals have been altered and have become significantly less magnetic.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB092iB06p04867","usgsCitation":"Williams, D.L., and Finn, C.A., 1987, Evidence for a shallow pluton beneath the Goat Rocks Wilderness, Washington, from gravity and magnetic data: Journal of Geophysical Research B: Solid Earth, v. 92, no. B6, p. 4867-4880, https://doi.org/10.1029/JB092iB06p04867.","productDescription":"14 p.","startPage":"4867","endPage":"4880","costCenters":[],"links":[{"id":420313,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Washington","otherGeospatial":"Goat Rocks Wilderness","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -121.73670660795202,\n              46.68728048256335\n            ],\n            [\n              -121.73670660795202,\n              46.35369936378592\n            ],\n            [\n              -121.12318061423747,\n              46.35369936378592\n            ],\n            [\n              -121.12318061423747,\n              46.68728048256335\n            ],\n            [\n              -121.73670660795202,\n              46.68728048256335\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"92","issue":"B6","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Williams, David L.","contributorId":10028,"corporation":false,"usgs":true,"family":"Williams","given":"David","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":881461,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Finn, Carol A. 0000-0002-6178-0405 cfinn@usgs.gov","orcid":"https://orcid.org/0000-0002-6178-0405","contributorId":1326,"corporation":false,"usgs":true,"family":"Finn","given":"Carol","email":"cfinn@usgs.gov","middleInitial":"A.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":881462,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"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":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":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":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":617,"text":"Volcano 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":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":70015283,"text":"70015283 - 1987 - Use of topological information in hydrograph estimation","interactions":[],"lastModifiedDate":"2026-04-21T16:28:01.176307","indexId":"70015283","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Use of topological information in hydrograph estimation","docAbstract":"<p><span>Discharge hydrographs computed from the theory of linear flow through topologically random channel networks are compared to actual discharge hydrographs for basins in semiarid regions of central Wyoming. The basins drained by the channel networks range in size from 0.69 to 10.8 square miles. Topological information consisting of stream-network magnitude and link -length distribution parameters are used in calibrating celerity values that ensure that the peak discharge and excess rainfall volume of the resulting computed hydrographs match the peak discharge and excess-rainfall volume of the actual hydrographs. Results indicate that, for a given peak discharge and excess-rainfall volume in a basin, the sensitivity of the calibrated celerity values to excess-rainfall duration is small if the ratio of excess-rainfall volume to peak discharge is at least 1.75 times the excess-rainfall duration.</span></p>","language":"English","doi":"10.1111/j.1752-1688.1987.tb00806.x","issn":"00431370","usgsCitation":"Karlinger, M., Guertin, D., and Troutman, B., 1987, Use of topological information in hydrograph estimation: Journal of the American Water Resources Association, v. 23, no. 2, p. 271-279, https://doi.org/10.1111/j.1752-1688.1987.tb00806.x.","productDescription":"9 p.","startPage":"271","endPage":"279","costCenters":[],"links":[{"id":224029,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-11","publicationStatus":"PW","scienceBaseUri":"505bbb82e4b08c986b328680","contributors":{"authors":[{"text":"Karlinger, M.R.","contributorId":95039,"corporation":false,"usgs":true,"family":"Karlinger","given":"M.R.","affiliations":[],"preferred":false,"id":370539,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Guertin, D.P.","contributorId":36264,"corporation":false,"usgs":true,"family":"Guertin","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":370537,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Troutman, B.M.","contributorId":73638,"corporation":false,"usgs":true,"family":"Troutman","given":"B.M.","email":"","affiliations":[],"preferred":false,"id":370538,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"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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Michael","contributorId":98877,"corporation":false,"usgs":true,"family":"Scott","given":"J.","email":"","middleInitial":"Michael","affiliations":[],"preferred":false,"id":335769,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mountainspring, Stephen","contributorId":22450,"corporation":false,"usgs":true,"family":"Mountainspring","given":"Stephen","email":"","affiliations":[],"preferred":false,"id":335768,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":1003071,"text":"1003071 - 1987 - Sedimentation in Lake Onalaska, navigation pool 7, Upper Mississippi River, since impoundment","interactions":[],"lastModifiedDate":"2026-04-21T16:19:50.023407","indexId":"1003071","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Sedimentation in Lake Onalaska, navigation pool 7, Upper Mississippi River, since impoundment","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>Sediment accumulation was evaluated in Lake Onalaska, a 2800-ha backwater impoundment on the Upper Mississippi River. Computer programs were used to process bathometric charts and generate an extensive data set on water depth for the lake. Comparison of 1983 survey data with pre-impoundment (before 1937) data showed that Lake Onalaska had lost less than 10 percent of its original mean depth in the 46 years since impoundment. Previous estimates of sedimentation rates based on Cesium-137 sediment core analysis appear to have been too high.</span></span></p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.1987.tb00799.x","issn":"00431370","usgsCitation":"Korschgen, C.E., Jackson, G.A., Muessig, L., and Southworth, D., 1987, Sedimentation in Lake Onalaska, navigation pool 7, Upper Mississippi River, since impoundment: Journal of the American Water Resources Association, v. 23, no. 2, p. 221-226, https://doi.org/10.1111/j.1752-1688.1987.tb00799.x.","productDescription":"6 p.","startPage":"221","endPage":"226","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":129981,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wisconsin","otherGeospatial":"Lake Onalaska, Upper Mississippi River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -91.36479496225748,\n              43.97561998248412\n            ],\n            [\n              -91.36479496225748,\n              43.85908889265227\n            ],\n            [\n              -91.21155734312211,\n              43.85908889265227\n            ],\n            [\n              -91.21155734312211,\n              43.97561998248412\n            ],\n            [\n              -91.36479496225748,\n              43.97561998248412\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"23","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"4f4e4a0be4b07f02db5fbcc5","contributors":{"authors":[{"text":"Korschgen, C. E.","contributorId":9197,"corporation":false,"usgs":true,"family":"Korschgen","given":"C.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":312701,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jackson, G. A.","contributorId":73138,"corporation":false,"usgs":true,"family":"Jackson","given":"G.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":312704,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Muessig, L.F.","contributorId":12810,"corporation":false,"usgs":true,"family":"Muessig","given":"L.F.","email":"","affiliations":[],"preferred":false,"id":312702,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Southworth, D.C.","contributorId":36081,"corporation":false,"usgs":true,"family":"Southworth","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":312703,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70015125,"text":"70015125 - 1987 - Velocity control as a tool for optimal plume containment in the Equus Beds aquifer, Kansas","interactions":[],"lastModifiedDate":"2026-04-21T16:36:14.053275","indexId":"70015125","displayToPublicDate":"1987-04-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Velocity control as a tool for optimal plume containment in the Equus Beds aquifer, Kansas","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>A ground-water-management model was developed to investigate the best management options for the containment of an oil-field-brine plume in the Equus Beds aquifer in south-central Kansas. The main purpose of the management model was to find the optimal locations and minimum rates of pumpage of a set of plume-interception wells, to successfully reverse the velocity vectors at observation wells located along the plume front, and also to satisfy freshwater demands from supply wells. The effects of the calculated minimum withdrawals from the interception wells on the migration of contaminants throughout the ground-water system were evaluated utilizing a solute-transport model. This latter analysis was carried out to ensure the containment of the plume. Whereas application of the management model to the study area achieves the management objectives, the implementation of the results is believed to be impractical and expensive. This is because a considerable amount of water must be pumped out to reverse the velocity vectors in the vicinity of the plume. In general, the proposed technique of pollutant containment may be effective when applied to aquifers having low hydraulic gradients and/or to aquifers with hazardous plumes whose containment is not subject to economic constraints.</span></span></p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.1987.tb00812.x","issn":"00431370","usgsCitation":"Heidari, M., Sadeghipour, J., and Drici, O., 1987, Velocity control as a tool for optimal plume containment in the Equus Beds aquifer, Kansas: Journal of the American Water Resources Association, v. 23, no. 2, p. 325-335, https://doi.org/10.1111/j.1752-1688.1987.tb00812.x.","productDescription":"11 p.","startPage":"325","endPage":"335","costCenters":[],"links":[{"id":224290,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Kansas","otherGeospatial":"Equus Beds aquifer","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -97.84257394157574,\n              38.0524318705408\n            ],\n            [\n              -97.84257394157574,\n              37.67003816300236\n            ],\n            [\n              -97.2633826777882,\n              37.67003816300236\n            ],\n            [\n              -97.2633826777882,\n              38.0524318705408\n            ],\n            [\n              -97.84257394157574,\n              38.0524318705408\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"23","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"505bc1f6e4b08c986b32a858","contributors":{"authors":[{"text":"Heidari, M.","contributorId":26430,"corporation":false,"usgs":true,"family":"Heidari","given":"M.","email":"","affiliations":[],"preferred":false,"id":370137,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sadeghipour, J.","contributorId":83277,"corporation":false,"usgs":true,"family":"Sadeghipour","given":"J.","email":"","affiliations":[],"preferred":false,"id":370138,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Drici, O.","contributorId":90886,"corporation":false,"usgs":true,"family":"Drici","given":"O.","email":"","affiliations":[],"preferred":false,"id":370139,"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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,{"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}]}}
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