{"pageNumber":"1531","pageRowStart":"38250","pageSize":"25","recordCount":40828,"records":[{"id":70011843,"text":"70011843 - 1982 - Preliminary model of regional Mesozoic groundwater flow and uranium deposition in the Colorado Plateau.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:05","indexId":"70011843","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Preliminary model of regional Mesozoic groundwater flow and uranium deposition in the Colorado Plateau.","docAbstract":"Qualitative and numerical simulation of regional groundwater flow in the Colorado Plateau during Late Jurassic and Early Cretaceous time has led to a model of U deposition in areas of upwelling solutions. Palaeographic reconstruction shows that surface drainage and groundwater flow was generally to the NE and E. Groundwater flowing in these directions, principally through Triassic-Jurassic and Permian sandstones, encountered sediments of variable thickness due to buried uplifted or downdropped Precambrian blocks. The buried uplifted blocks caused upward movement of groundwater around them. These inferred zones of upwelling are closely associated with concentrations of Jurassic- and Cretaceous-age U deposits. The results are consistent with hypotheses of an upwelling brine mixing and reacting with descending meteoric water and causing U precipitation at the fluid interface. Whether the U came from above or below the interface is an unsolved problem.-A.P.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00917613","usgsCitation":"Sanford, R., 1982, Preliminary model of regional Mesozoic groundwater flow and uranium deposition in the Colorado Plateau.: Geology, v. 10, no. 7, p. 348-352.","startPage":"348","endPage":"352","numberOfPages":"5","costCenters":[],"links":[{"id":221615,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8930e4b0c8380cd7dd1d","contributors":{"authors":[{"text":"Sanford, R.F.","contributorId":38562,"corporation":false,"usgs":true,"family":"Sanford","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":362092,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011861,"text":"70011861 - 1982 - Benthic phosphorus regeneration in the Potomac River Estuary","interactions":[],"lastModifiedDate":"2012-03-12T17:18:33","indexId":"70011861","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Benthic phosphorus regeneration in the Potomac River Estuary","docAbstract":"The flux of dissolved reactive phosphate from Potomac riverine and estuarine sediments is controlled by processes occurring at the water-sediment interface and within surficial sediment. In situ benthic fluxes (0.1 to 2.0 mmoles m-2 day-1) are generally five to ten times higher than calculated diffusive fluxes (0.020 to 0.30 mmoles m-2 day-1). The discrepancy between the two flux estimates is greatest in the transition zone (river mile 50 to 70) and is attributd to macrofaunal irrigation. Both in situ and diffusive fluxes of dissolved reactive phosphate from Potomac tidal river sediments are low while those from anoxic lower estuarine sediments are high. The net accumulation rate of phosphorus in benthic sediment exhibits an inverse pattern. Thus a large fraction of phosphorus is retained by Potomac tidal river sediments, which contain a surficial oxidized layer and oligochaete worms tolerant of low oxygen conditions, and a large fraction of phosphorus is released from anoxic lower estuary sediments. Tidal river sediment pore waters are in equilibrium with amorphous Fe (OH)3 while lower estuary pore waters are significantly undersaturated with respect to this phase. Benthic regeneration of dissolved reactive phosphorus is sufficient to supply all the phosphorus requirements for net primary production in the lower tidal river and transition-zone waters of the Potomac River Estuary. Benthic regeneration supplies approximately 25% as much phosphorus as inputs from sewage treatment plants and 10% of all phosphorus inputs to the tidal Potomac River. When all available point source phosphorus data are put into a steady-state conservation of mass model and reasonable coefficients for uptake of dissolved phosphorus, remineralization of particulate phosphorus, and sedimentation of particulate phosphorus are used in the model, a reasonably accurate simulation of dissolved and particulate phosphorus in the water column is obtained for the summer of 1980. ?? 1982 Dr W. Junk Publishers.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers","doi":"10.1007/BF00000042","issn":"00188158","usgsCitation":"Callender, E., 1982, Benthic phosphorus regeneration in the Potomac River Estuary: Hydrobiologia, v. 91-92, no. 0, p. 431-446, https://doi.org/10.1007/BF00000042.","startPage":"431","endPage":"446","numberOfPages":"16","costCenters":[],"links":[{"id":205067,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00000042"},{"id":220862,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91-92","issue":"0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f0c2e4b0c8380cd4a8ce","contributors":{"authors":[{"text":"Callender, E.","contributorId":72528,"corporation":false,"usgs":true,"family":"Callender","given":"E.","email":"","affiliations":[],"preferred":false,"id":362142,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011862,"text":"70011862 - 1982 - Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii","interactions":[],"lastModifiedDate":"2015-06-10T13:12:35","indexId":"70011862","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii","docAbstract":"<p><span>Piton de la Fournaise, on the island of La R&eacute;union, and Kilauea volcano, on the island of Hawaii, are active, basaltic shield volcanoes growing on the flanks of much larger shield volcanoes in intraplate tectonic environments. Past studies have shown that the average rate of magma production and the chemistry of lavas are quite similar for both volcanoes. We propose a structural similarity &mdash; specifically, that periodic displacement of parts of the shields as huge landslide blocks is a common mode of growth. In each instance, the unstable blocks are within a rift-zone-bounded, unbuttressed flank of the shield. At Kilauea, well-documented landslide blocks form relatively surficial parts of a much larger rift-zone-bounded block; scarps of the Hilina fault system mark the headwalls of the active blocks. At Fournaise, Hilina-like slump blocks are also present along the unbuttressed east coast of the volcano. In addition, however, the existence of a set of faults nested around the present caldera and northeast and southeast rift zones suggests that past chapters in the history of Fournaise included the slumping of entire rift-zone-bounded blocks themselves. These nested faults become younger to the east southeast and apparently record one of the effects of a migration of the focus of volcanism in that direction. Repeated dilation along the present set of northeast and southeast rift zones, most recently exemplified by an eruption in 1977, suggests that the past history of rift-zone-bounded slumping will eventually be repeated. The record provided by the succession of slump blocks on Fournaise is apparently at a relatively detailed part of a migration of magmatic focus that has advanced at least 30 km to the east-southeast from neighboring Piton des Neiges, an extinct Pliocene to Pleistocene volcano.</span>?? 1982.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0377-0273(82)90009-9","issn":"03770273","usgsCitation":"Duffield, W.A., Stieltjes, L., and Varet, J., 1982, Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii: Journal of Volcanology and Geothermal Research, v. 12, no. 1-2, p. 147-160, https://doi.org/10.1016/0377-0273(82)90009-9.","productDescription":"14 p.","startPage":"147","endPage":"160","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":220863,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"12","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3274e4b0c8380cd5e803","contributors":{"authors":[{"text":"Duffield, Wendell A.","contributorId":14363,"corporation":false,"usgs":true,"family":"Duffield","given":"Wendell","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":362143,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stieltjes, Laurent","contributorId":99287,"corporation":false,"usgs":true,"family":"Stieltjes","given":"Laurent","email":"","affiliations":[],"preferred":false,"id":362145,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Varet, Jacques","contributorId":88877,"corporation":false,"usgs":true,"family":"Varet","given":"Jacques","email":"","affiliations":[],"preferred":false,"id":362144,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011876,"text":"70011876 - 1982 - International geomagnetic reference field 1980: a report by IAGA Division I working group.","interactions":[],"lastModifiedDate":"2013-03-12T11:29:10","indexId":"70011876","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1804,"text":"Geophysical Journal of the Royal Astronomical Society","active":true,"publicationSubtype":{"id":10}},"title":"International geomagnetic reference field 1980: a report by IAGA Division I working group.","docAbstract":"Describes the recommendations of the working group, which suggested additions to IGRF because of the cumulative effect of the inevitable uncertainties in the secular variation models which had led to unacceptable inaccuracies in the IGRF by the late 1970's. The recommendations were accepted by the International Association of Geomagnetism and Aeronomy on August 15, 1981 at the 4th Scientific Assembly, Edinburgh. An extended table sets out spherical harmonic coefficients of the IGRF 1980.-R.House","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Journal of the Royal Astronomical Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1111/j.1365-246X.1982.tb06974.x","usgsCitation":"Peddie, N., 1982, International geomagnetic reference field 1980: a report by IAGA Division I working group.: Geophysical Journal of the Royal Astronomical Society, v. 68, no. 1, p. 265-268, https://doi.org/10.1111/j.1365-246X.1982.tb06974.x.","startPage":"265","endPage":"268","numberOfPages":"4","costCenters":[],"links":[{"id":221067,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269144,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-246X.1982.tb06974.x"}],"volume":"68","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3d3be4b0c8380cd633e4","contributors":{"authors":[{"text":"Peddie, N.W.","contributorId":75911,"corporation":false,"usgs":true,"family":"Peddie","given":"N.W.","affiliations":[],"preferred":false,"id":362180,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011880,"text":"70011880 - 1982 - Upper crustal structure of the Mount Hood, Oregon, region as revealed by time term analysis","interactions":[],"lastModifiedDate":"2024-07-16T14:47:54.258421","indexId":"70011880","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Upper crustal structure of the Mount Hood, Oregon, region as revealed by time term analysis","docAbstract":"<p><span>Seismic refraction data with a dense areal distribution were collected to study the seismic structure of Mount Hood and the surrounding region. This area is typical of Cascade volcanoes and is geologically quite complex. The prime goals of this project were to search for velocity variations in the upper crustal rocks and to determine if the velocity of these rocks is anisotropic. A new system, including 100 remote recording units, was developed to facilitate the collection of data in this type of survey. The data collected in this study reveal a large variation in velocity and thickness of the uppermost crustal rocks that is probably typical of the High Cascade province. A regional structural pattern surrounding Mount Hood, where there is a marked thinning of low-velocity near-surface rocks, suggests that the present edifice of Mount Hood lies on top of a much larger structure, possibly the roof of a large batholith that was emplaced prior to the eruption of the volcanic rocks that form the modern mountain. A straightforward time term analysis of the data reveals this structure. When the time terms are used to correct the travel time observations for the variation in structure under each station, the remaining set of residuals indicates a variation of travel time with azimuth. While a systematic error in the time term reduction cannot be ruled out, this variation is probably the result of anisotropic velocity structure in the underlying refractor. The alignment of the direction of maximum velocity with the direction of maximum principal stress and the decrease in anisotropy with depth suggest that the anisotropic velocity structure is related to the opening and closing of fractures in the present stress field. The direction of maximum velocity is about N25°W, and the degree of anisotropy appears to vary with depth from about 3% near the surface to zero at depths below 8 km.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB087iB01p00339","issn":"01480227","usgsCitation":"Kohler, W., Healy, J.H., and Wegener, S., 1982, Upper crustal structure of the Mount Hood, Oregon, region as revealed by time term analysis: Journal of Geophysical Research Solid Earth, v. 87, no. B1, p. 339-355, https://doi.org/10.1029/JB087iB01p00339.","productDescription":"17 p.","startPage":"339","endPage":"355","numberOfPages":"17","costCenters":[],"links":[{"id":221135,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"87","issue":"B1","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505bbd56e4b08c986b328f8e","contributors":{"authors":[{"text":"Kohler, W.M.","contributorId":62999,"corporation":false,"usgs":true,"family":"Kohler","given":"W.M.","email":"","affiliations":[],"preferred":false,"id":362190,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Healy, J. H.","contributorId":48968,"corporation":false,"usgs":true,"family":"Healy","given":"J.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":362189,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wegener, S.S.","contributorId":67654,"corporation":false,"usgs":true,"family":"Wegener","given":"S.S.","email":"","affiliations":[],"preferred":false,"id":362191,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011892,"text":"70011892 - 1982 - Lead and strontium isotopes and related trace elements as genetic tracers in the Upper Cenozoic rhyolite-basalt association of the Yellowstone Plateau volcanic field","interactions":[],"lastModifiedDate":"2024-07-16T14:46:02.2975","indexId":"70011892","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Lead and strontium isotopes and related trace elements as genetic tracers in the Upper Cenozoic rhyolite-basalt association of the Yellowstone Plateau volcanic field","docAbstract":"<p><span>Supported by various field geologic and petrologic data, the contents of Pb, U, Th, Rb, and Sr and the isotopic compositions of Pb and Sr for upper Cenozoic volcanic rocks of the Yellowstone Plateau volcanic field are consistent with the hypothesis of derivation of the basaltic and rhyolitic magmas by partial melting of distinct source regions in the upper mantle and lower crust, respectively. All the basalt samples analyzed but one have systematically lower values of&nbsp;</span><sup>207</sup><span>Pb/</span><sup>204</sup><span>Pb and&nbsp;</span><sup>87</sup><span>Sr/</span><sup>86</sup><span>Sr than the rhyolites. The values of&nbsp;</span><sup>206</sup><span>Pb/</span><sup>204</sup><span>Pb are smaller, and&nbsp;</span><sup>87</sup><span>Sr/</span><sup>86</sup><span>Sr are mostly larger than known values in oceanic basalts. In all but one case, the values of&nbsp;</span><sup>207</sup><span>Pb/</span><sup>204</sup><span>Pb are higher than expected from an extrapolation of known values in oceanic basalts to less radiogenic values of&nbsp;</span><sup>206</sup><span>Pb/</span><sup>204</sup><span>Pb. Because there are no xenoliths, phenocrysts are only moderate to sparse in abundance, REE patterns are low and flat at the radiogenic end of lead isotopic compositions, several values of Rb/Sr are low, and 80% of the basalt samples form a well-developed secondary isochron separate from the rhyolites, we favor an interpretation for basalt genesis wherein isotopic signatures of most mafic magmas were attained in a continental ‘keel’ of mantlelike character about 2.6 b.y. old or somewhat older attached to the crust, and these signatures were unaltered by magma passage through the crust. At the very least, the current data continue to cast serious doubt as to the inevitability of crustal contamination for basaltic magma intruding the continental environment and postulate that much can be learned about the mantle under continents through the study of continental basalts. One basalt unit with an unusually low value of&nbsp;</span><sup>207</sup><span>Pb/</span><sup>204</sup><span>Pb and an&nbsp;</span><sup>87</sup><span>Ar/</span><sup>86</sup><span>Ar less than 0.704 may represent subcontinental ‘keel’-derived magma that rose unaltered to the surface. Our data also are not consistent with formation of this rhyolite-basalt association primarily by such processes as crystal fractionation, separation of immiscible silicate liquids from a common parental magma, or fractional melting of a homogeneous source. Rather as a conceptual model, we envision large mafic intrusions to have been injected into the lower crust resulting in rhyolite generation through partial anatexis of the adjacent wall rocks which probably had a&nbsp;</span><sup>206</sup><span>Pb/</span><sup>204</sup><span>Pb &lt; 17 and&nbsp;</span><sup>87</sup><span>Sr/</span><sup>86</sup><span>Sr &gt; 0.709; a model that has much in common with that proposed by Holmes (1931). All the other hypotheses listed have the necessary added complication that either the basalt or the rhyolite or both become contaminated after the two magma types separated, have problems accounting for the lack of igneous rocks of intermediate compositions or production of such large volumes of rhyolitic material (∼5000 km</span><sup>3</sup><span>), and fail to explain why rhyolitic magma is not a more common occurrence in the ocean basin. We appeal to bouyancy of rhyolites to generate a barrier for basalt magma migration and account for the great preponderance of rhyolite relative to basalt at the surface. Furthermore, the complex isotopic picture in the rhyolites indicates that many of these magmas interacted with the upper crustal geologic units that they traversed. The interactions involved diverse processes, probably including reacton with hydrothermal fluids or hydrothermally altered rocks at high levels as well as by contamination with Phanerozoic sedimentary and Precambrian crystalline rocks at deeper levels. At the very least, we feel our study adds a cautionary note to the currently increasingly popular hypothesis that differentiation of basalt or gabbro magmas to rhyolite or granite (as distinct from tonalite or dacite) is a common occurrence and is therefore an important continential building process. Models for formation of rhyolite and granite predominantly by reworking of crust (anatexis) must still be considered. The primitive Archean mantle of the region was characterized by higher Rb/Sr, U/Pb, and Th/U values than are typical of modern suboceanic mantle. The mantle residuum within the continental subcrustal lithosperic ‘keel’ that resulted from the Archean crustal differentiation event probably was depleted in Rb/Sr and U/Pb, and the crust was correspondingly enriched in these ratios. The crust probably was further differentiated by an Archean high-grade metamorphism, during or after the primary event, into a granulitic lower crust depleted in U/Pb and Rb/Sr and a lower-grade upper crust enriched in these ratios.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB087iB06p04785","issn":"01480227","usgsCitation":"Doe, B.R., Leeman, W., Christiansen, R., and Hedge, C., 1982, Lead and strontium isotopes and related trace elements as genetic tracers in the Upper Cenozoic rhyolite-basalt association of the Yellowstone Plateau volcanic field: Journal of Geophysical Research Solid Earth, v. 87, no. B6, p. 4785-4806, https://doi.org/10.1029/JB087iB06p04785.","productDescription":"22 p.","startPage":"4785","endPage":"4806","numberOfPages":"22","costCenters":[],"links":[{"id":221323,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"87","issue":"B6","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a45ade4b0c8380cd67474","contributors":{"authors":[{"text":"Doe, B. R.","contributorId":52173,"corporation":false,"usgs":true,"family":"Doe","given":"B.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":362227,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leeman, W.P.","contributorId":7841,"corporation":false,"usgs":true,"family":"Leeman","given":"W.P.","affiliations":[],"preferred":false,"id":362225,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Christiansen, R.L. 0000-0002-8017-3918","orcid":"https://orcid.org/0000-0002-8017-3918","contributorId":25565,"corporation":false,"usgs":true,"family":"Christiansen","given":"R.L.","affiliations":[],"preferred":false,"id":362226,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hedge, C. E.","contributorId":73611,"corporation":false,"usgs":true,"family":"Hedge","given":"C. E.","affiliations":[],"preferred":false,"id":362228,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70011893,"text":"70011893 - 1982 - Margaritasite: a new mineral of hydrothermal origin from the Pena Blanca uranium district, Mexico.","interactions":[],"lastModifiedDate":"2013-02-14T09:52:09","indexId":"70011893","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":738,"text":"American Mineralogist","active":true,"publicationSubtype":{"id":10}},"title":"Margaritasite: a new mineral of hydrothermal origin from the Pena Blanca uranium district, Mexico.","docAbstract":"Margaritasite, (Cs,K,H3O)2(UO2)2V2O8.nH2O (where Cs > K, H3O and n approx 1), a 10.514, b 8.425, c 7.25 A, beta 106.01o, P21/a, Z = 2, is a newly recognized uranium ore mineral named for the Margaritas deposit, Pena Blanca uranium district, Chihuahua, Mexico, at which it was discovered. A Cs-rich analogue of carnotite, margaritasite is the natural equivalent of synthetic Cs-uranyl vanadate (A.M. 43- 799, 50-825). A fine-grained yellow mineral, it is most easily distinguished from carnotite by XRD; X-ray powder patterns (CuKalpha radiation) show that the (001) reflection of margaritasite lies at 12.7o (2theta ), while that of carnotite is found at 13.8o (2theta ). The shift of the (001) reflection in margaritasite reflects the structural changes caused when Cs occupies the sites filled by K in carnotite. Synthesis experiments indicate that margaritasite also differs from carnotite in a higher-T hydrothermal origin. Chemical analyses and XRD data for margaritasite and synthetic Cs- carnotite, and chemical analyses for rocks from Sierra Pena Blanca and vicinity, are tabulated.-J.A.Z.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Mineralogist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Mineralogical Society of America","issn":"0003004X","usgsCitation":"Wenrich, K., Modreski, P., Zielinski, R.A., and Seeley, J.L., 1982, Margaritasite: a new mineral of hydrothermal origin from the Pena Blanca uranium district, Mexico.: American Mineralogist, v. 67, no. 11-12, p. 1273-1289.","startPage":"1273","endPage":"1289","numberOfPages":"17","costCenters":[],"links":[{"id":221324,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":267367,"type":{"id":11,"text":"Document"},"url":"https://www.minsocam.org/ammin/AM67/AM67_1273.pdf"}],"volume":"67","issue":"11-12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a51c3e4b0c8380cd6bf0e","contributors":{"authors":[{"text":"Wenrich, K. J.","contributorId":40203,"corporation":false,"usgs":true,"family":"Wenrich","given":"K. J.","affiliations":[],"preferred":false,"id":362229,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Modreski, P.J.","contributorId":98335,"corporation":false,"usgs":true,"family":"Modreski","given":"P.J.","affiliations":[],"preferred":false,"id":362231,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zielinski, R. A. 0000-0002-4047-5129","orcid":"https://orcid.org/0000-0002-4047-5129","contributorId":106930,"corporation":false,"usgs":true,"family":"Zielinski","given":"R.","email":"","middleInitial":"A.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":362232,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Seeley, J. L.","contributorId":57864,"corporation":false,"usgs":true,"family":"Seeley","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":362230,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70011896,"text":"70011896 - 1982 - Evolution of continental crust and mantle heterogeneity: Evidence from Hf isotopes","interactions":[],"lastModifiedDate":"2012-03-12T17:18:33","indexId":"70011896","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1336,"text":"Contributions to Mineralogy and Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Evolution of continental crust and mantle heterogeneity: Evidence from Hf isotopes","docAbstract":"We present initial 176Hf/177 Hf ratios for many samples of continental crust 3.7-0.3 Gy old. Results are based chiefly on zircons (1% Hf) and whole rocks: zircons are shown to be reliable carriers of essentially the initial Hf itself when properly chosen on the basis of U-Pb studies. Pre-3.0 Gy gneisses were apparently derived from an unfractionated mantle, but both depleted and undepleted mantle are evident as magma sources from 2.9 Gy to present. This mantle was sampled mainly from major crustal growth episodes 2.8, 1.8 and 0.7 Gy ago, all of which show gross heterogeneity of 176Hf/177Hf in magma sources from ??Hf=0 to +14, or about 60% of the variability of the present mantle. The approximate ??Hf=2??Nd relationship in ancient and modern igneous rocks shows that 176Lu/177Hf fractionates in general twice as much as 147Sm/144Nd in mantle melting processes. This allows an estimation of the relative value of the unknown bulk solid/liquid distribution coefficient for Hf. DLu/DHf=??? 2.3 holds for most mantle source regions. For garnet to be an important residual mantle phase, it must hold Hf strongly in order to preserve Hf-Nd isotopic relationships. The ancient Hf initials are consistent with only a small proportion of recycled older cratons in new continental crust, and with quasi-continuous, episodic growth of the continental crust with time. However, recycling of crust less than 150 My old cannot realistically be detected using Hf initials. The mantle shows clearly the general positive ??Hf resulting from a residual geochemical state at least back to 2.9 Gy ago, and seems to have repeatedly possessed a similar degree of heterogeneity, rather than a continuously-developing depletion. This is consistent with a complex dynamic disequilibrium model for the creation, maintenance and destruction of heterogeneity in the mantle. ?? 1981 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Contributions to Mineralogy and Petrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF00398923","issn":"00107999","usgsCitation":"Jonathan, P.P., Kouvo, O., Hedge, C., and Tatsumoto, M., 1982, Evolution of continental crust and mantle heterogeneity: Evidence from Hf isotopes: Contributions to Mineralogy and Petrology, v. 78, no. 3, p. 279-297, https://doi.org/10.1007/BF00398923.","startPage":"279","endPage":"297","numberOfPages":"19","costCenters":[],"links":[{"id":205116,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00398923"},{"id":221396,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"78","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d7ee4b0c8380cd53056","contributors":{"authors":[{"text":"Jonathan, Patchett P.","contributorId":85323,"corporation":false,"usgs":true,"family":"Jonathan","given":"Patchett","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":362238,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kouvo, O.","contributorId":50658,"corporation":false,"usgs":true,"family":"Kouvo","given":"O.","email":"","affiliations":[],"preferred":false,"id":362235,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hedge, C. E.","contributorId":73611,"corporation":false,"usgs":true,"family":"Hedge","given":"C. E.","affiliations":[],"preferred":false,"id":362236,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tatsumoto, M.","contributorId":76798,"corporation":false,"usgs":true,"family":"Tatsumoto","given":"M.","email":"","affiliations":[],"preferred":false,"id":362237,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70011914,"text":"70011914 - 1982 - The UThPb age of equilibrated L chondrites and a solution to the excess radiogenic Pb problem in chondrites","interactions":[],"lastModifiedDate":"2023-12-12T12:24:40.6249","indexId":"70011914","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"The UThPb age of equilibrated L chondrites and a solution to the excess radiogenic Pb problem in chondrites","docAbstract":"<p>U, Th, and Pb analyses of whole-rock and troilite separates from seven L chondrites suggest that the excess radiogenic Pb relative to U and the large variations in Pb<img src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" alt=\"single bond\" data-mce-src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\">Pb model ages commonly observed in chondritic meteorites are largely due to terrestrial Pb contamination induced prior to analyses. Using the Pb isotopic composition of troilite separates to calculate the isotopic composition of the Pb contaminants, the whole-rock data have been corrected for pre-analysis terrestrial Pb contamination. Two approaches have been used: (1) the chondrite-troilite apparent initial Pb isotopic compositions were used to approximate the mixture of indigenous intial Pb and terrestrial Pb in the whole-rock sample, and (2) a single-stage (concordant) model was applied using the assumption that the excess radiogenic Pb in these samples was terrestrial. Data for L5 and L6 chondrites yield a<i>4551 ± 7My</i><span>&nbsp;</span>age using the former correction and a<i>4550 ± 5My</i><span>&nbsp;</span>age using the latter one.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(82)90104-2","issn":"0012821X","usgsCitation":"Unruh, D., 1982, The UThPb age of equilibrated L chondrites and a solution to the excess radiogenic Pb problem in chondrites: Earth and Planetary Science Letters, v. 58, no. 1, p. 75-94, https://doi.org/10.1016/0012-821X(82)90104-2.","productDescription":"20 p.","startPage":"75","endPage":"94","numberOfPages":"20","costCenters":[],"links":[{"id":221781,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"58","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba955e4b08c986b3221ce","contributors":{"authors":[{"text":"Unruh, D.M.","contributorId":8498,"corporation":false,"usgs":true,"family":"Unruh","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":362275,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70175019,"text":"70175019 - 1982 - Modeling of tidal and residual circulation in San Francisco Bay, California","interactions":[],"lastModifiedDate":"2016-07-26T16:09:30","indexId":"70175019","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Modeling of tidal and residual circulation in San Francisco Bay, California","docAbstract":"<p><span>Several numerical models have been developed and implemented to simulate tidal and residual circulation in San Francisco Bay. Because of a broad distribution in time scales, hydrodynamic models must be formulated to account for the proper time and spatial scales which dominate the transport processes. A complete current survey of the San Francisco Bay system was conducted jointly between NOS/NOAA and USGS (Patchen and Cheng, 1979). Presently, these current meter data are being processed and analyzed, and concurrently further development of tidal and residual circulation models continues. When these data become available, they will be used to calibrate the numerical models and to guide refinement of hydrodynamic models in order to maximize our understanding of the Bay system. Our modeling efforts will be extended to the northern reach of the Bay system.</span></p>","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkTitle":"Proceedings, Seminar on 2-D Flows","conferenceTitle":"Seminar on 2-D Flows","conferenceDate":"July 1981","conferenceLocation":"Davis, Calif.","language":"English","publisher":"U.S. Army Corps of Engineers","usgsCitation":"Cheng, R.T., 1982, Modeling of tidal and residual circulation in San Francisco Bay, California, <i>in</i> Proceedings, Seminar on 2-D Flows, Davis, Calif., July 1981, p. 172-185.","productDescription":"16 p.","startPage":"172","endPage":"185","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":325674,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"579889bce4b0589fa1c6bac6","contributors":{"authors":[{"text":"Cheng, R. T.","contributorId":23138,"corporation":false,"usgs":false,"family":"Cheng","given":"R.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":643618,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70175296,"text":"70175296 - 1982 - Modeling of estuarine hydrodynamics and field data requirements","interactions":[],"lastModifiedDate":"2016-08-04T09:54:53","indexId":"70175296","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5161,"text":"Finite Methods in Fluids","active":true,"publicationSubtype":{"id":10}},"title":"Modeling of estuarine hydrodynamics and field data requirements","docAbstract":"<p>No abstract available.</p>","language":"English","usgsCitation":"Cheng, R.T., and Walters, R.A., 1982, Modeling of estuarine hydrodynamics and field data requirements: Finite Methods in Fluids, v. 4, p. 89-108.","productDescription":"20 p.","startPage":"89","endPage":"108","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":326098,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57a4674ae4b0ebae89b63cd6","contributors":{"authors":[{"text":"Cheng, R. T.","contributorId":23138,"corporation":false,"usgs":false,"family":"Cheng","given":"R.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":644725,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Walters, R. A.","contributorId":34174,"corporation":false,"usgs":true,"family":"Walters","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":644726,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70174596,"text":"70174596 - 1982 - Low-frequency variations in sea level and currents in south San Francisco Bay","interactions":[],"lastModifiedDate":"2016-07-27T15:41:46","indexId":"70174596","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2426,"text":"Journal of Physical Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Low-frequency variations in sea level and currents in south San Francisco Bay","docAbstract":"<p><span>In order to examine physical process in the subtidal time range, sea-level and current meter data for south San Francisco Bay (South Bay) were filtered using a low-pass digital filter to remove tidal period variations. and then subjected to an empirical orthogonal function analysis. For the sea-level data, there is one dominant empirical mode that is correlated with nonlocal coastal forcing. A small amount of the variance is associated with local wind setup. For the current meter data, there are two dominant empirical modes that correlate with local wind forcing and tidal forcing over the spring-neap cycle. In general, South Bay is dominated by coastal forcing on sea level during all seasons, and dominated by wind and tidal forcing on the residual currants during the summer.</span></p>","language":"English","publisher":"American Meteorological Society","doi":"10.1175/1520-0485(1982)012<0658:LFVISL>2.0.CO;2","usgsCitation":"Walters, R.A., 1982, Low-frequency variations in sea level and currents in south San Francisco Bay: Journal of Physical Oceanography, v. 12, p. 658-668, https://doi.org/10.1175/1520-0485(1982)012<0658:LFVISL>2.0.CO;2.","productDescription":"11 p.","startPage":"658","endPage":"668","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":480555,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1175/1520-0485(1982)012<0658:lfvisl>2.0.co;2","text":"Publisher Index Page"},{"id":325198,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.47695922851562,\n              37.41816326969145\n            ],\n            [\n              -122.47695922851562,\n              37.832564787218985\n            ],\n            [\n              -121.90292358398438,\n              37.832564787218985\n            ],\n            [\n              -121.90292358398438,\n              37.41816326969145\n            ],\n            [\n              -122.47695922851562,\n              37.41816326969145\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5787662fe4b0d27deb36e18e","contributors":{"authors":[{"text":"Walters, Roy A.","contributorId":74877,"corporation":false,"usgs":true,"family":"Walters","given":"Roy","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":642400,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70195658,"text":"70195658 - 1982 -  Numerical models of hydrothermal circulation for the intrusion zone at an ocean ridge axis","interactions":[{"subject":{"id":70195658,"text":"70195658 - 1982 -  Numerical models of hydrothermal circulation for the intrusion zone at an ocean ridge axis","indexId":"70195658","publicationYear":"1982","noYear":false,"title":" Numerical models of hydrothermal circulation for the intrusion zone at an ocean ridge axis"},"predicate":"IS_PART_OF","object":{"id":70190672,"text":"70190672 - 1982 - The dynamic environment of the ocean floor","indexId":"70190672","publicationYear":"1982","noYear":false,"title":"The dynamic environment of the ocean floor"},"id":1}],"isPartOf":{"id":70190672,"text":"70190672 - 1982 - The dynamic environment of the ocean floor","indexId":"70190672","publicationYear":"1982","noYear":false,"title":"The dynamic environment of the ocean floor"},"lastModifiedDate":"2018-02-26T11:54:39","indexId":"70195658","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":" Numerical models of hydrothermal circulation for the intrusion zone at an ocean ridge axis","docAbstract":"<p><span>No abstract available.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"The dynamic environment of the ocean floor","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"Lexington Books","isbn":"9780669028096","usgsCitation":"Patterson, P., and Lowell, R., 1982,  Numerical models of hydrothermal circulation for the intrusion zone at an ocean ridge axis, chap. <i>of</i> The dynamic environment of the ocean floor, p. 471-492.","productDescription":"22 p.","startPage":"471","endPage":"492","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":352008,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5aff4242e4b0da30c1bfdad5","contributors":{"editors":[{"text":"Fanning, Kent A.","contributorId":138529,"corporation":false,"usgs":false,"family":"Fanning","given":"Kent","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":729588,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Manheim, Frank T.","contributorId":26991,"corporation":false,"usgs":true,"family":"Manheim","given":"Frank","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":729589,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Patterson, P.L.","contributorId":71656,"corporation":false,"usgs":false,"family":"Patterson","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":729586,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lowell, R.P.","contributorId":167006,"corporation":false,"usgs":false,"family":"Lowell","given":"R.P.","email":"","affiliations":[{"id":12694,"text":"Virginia Tech","active":true,"usgs":false}],"preferred":false,"id":729587,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70186707,"text":"70186707 - 1982 - Deep structure and evolution of the Carolina Trough","interactions":[],"lastModifiedDate":"2018-03-05T15:15:43","indexId":"70186707","displayToPublicDate":"1982-01-01T00:00:00","publicationYear":"1982","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Deep structure and evolution of the Carolina Trough","docAbstract":"<p>Multichannel seismic-reflection data together with two-dimensional gravity and magnetic models suggest that the crustal structure off North Carolina consists of normal continental crust landward of the Brunswick magnetic anomaly (BMA), rift-stage crust in the 80-km-wide zone between the BMA and the East Coast magnetic anomaly (ECMA), and normal oceanic crust seaward of the ECMA.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Studies in continental margin geology","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"American Association of Petroleum Geologists","usgsCitation":"Hutchinson, D.R., Grow, J.A., Klitgord, K.D., and Swift, B., 1982, Deep structure and evolution of the Carolina Trough, chap. <i>of</i> Studies in continental margin geology, p. 129-152.","productDescription":"24 p. ","startPage":"129","endPage":"152","costCenters":[],"links":[{"id":339424,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":339423,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://archives.datapages.com/data/specpubs/history2/data/a110/a110/0001/0100/0129.htm"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58e8a556e4b09da6799d642e","contributors":{"authors":[{"text":"Hutchinson, D. R.","contributorId":31770,"corporation":false,"usgs":true,"family":"Hutchinson","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":690322,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grow, J. A.","contributorId":27858,"corporation":false,"usgs":true,"family":"Grow","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":690323,"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":690324,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Swift, B.A.","contributorId":32937,"corporation":false,"usgs":true,"family":"Swift","given":"B.A.","affiliations":[],"preferred":false,"id":690325,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":27323,"text":"wri80102 - 1981 - Relation between freshwater flow and salinity distributions in the Alafia River, Bullfrog Creek, and Hillsborough Bay, Florida","interactions":[],"lastModifiedDate":"2021-12-13T12:32:55.643289","indexId":"wri80102","displayToPublicDate":"2021-12-12T20:50:00","publicationYear":"1981","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"80-102","title":"Relation between freshwater flow and salinity distributions in the Alafia River, Bullfrog Creek, and Hillsborough Bay, Florida","docAbstract":"Data on streamflow, tide stage, specific conductance, and chloride concentration were collected in the Alafia River and Bullfrog Creek to describe the salinity and physical characteristics of the saltwater wedge. The location of the saltwater-freshwater interface for both streams was described by multiple regression equations involving streamflow and tide stage. Low-flow frequency data were used with regression relationships to show the effect of withdrawals of freshwater from the Alafia River on the location of the saltwater interface. Examples are presented without storage and with storage and minimum streamflow requirements. In every case, the effect of reductions in streamflow was upstream encroachment of saltwater. Salinity in Hillsborough Bay in the vicinity of the Alafia River and Bullfrog Creek was evaluated using a salt-transport model for various freshwater inflow conditions. Model results indicate that freshwater inflow from these streams has the greatest effect on the salinity of areas closest to the mouth during periods of above average inflow. (USGS)","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/wri80102","collaboration":"Prepared in cooperation with the Southwest Florida Water Management District","usgsCitation":"Giovannelli, R., and Southwest Florida Water Management District., 1981, Relation between freshwater flow and salinity distributions in the Alafia River, Bullfrog Creek, and Hillsborough Bay, Florida: U.S. Geological Survey Water-Resources Investigations Report 80-102, v, 62 p., https://doi.org/10.3133/wri80102.","productDescription":"v, 62 p.","costCenters":[{"id":27821,"text":"Caribbean-Florida Water Science Center","active":true,"usgs":true}],"links":[{"id":159022,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1980/0102/coverthb.jpg"},{"id":276454,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1980/0102/wri80102.pdf","text":"Report","size":"1.55 MB","linkFileType":{"id":1,"text":"pdf"},"description":"WRI 80-102"}],"contact":"<p><a href=\"https://www.usgs.gov/centers/car-fl-water\" data-mce-href=\"https://www.usgs.gov/centers/car-fl-water\">Caribbean-Florida Water Science Center</a><br>U.S. Geological Survey<br>3321 College Avenue<br>Davie, FL 33314</p><p><a href=\"../contact\" data-mce-href=\"../contact\">Contact Pubs Warehouse</a></p>","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ad1e4b07f02db68114b","contributors":{"authors":[{"text":"Giovannelli, R.F.","contributorId":71985,"corporation":false,"usgs":true,"family":"Giovannelli","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":197917,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Southwest Florida Water Management District.","contributorId":128222,"corporation":true,"usgs":false,"organization":"Southwest Florida Water Management District.","id":529223,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70047535,"text":"70047535 - 1981 - Hydrology and model of North Fork Solomon River Valley, Kirwin Dam to Waconda Lake, north-central Kansas","interactions":[{"subject":{"id":57097,"text":"ofr801024 - 1980 - Hydrology and Model of North Fork Solomon River Valley, Kirwin Dam to Waconda Lake, North-Central Kansas","indexId":"ofr801024","publicationYear":"1980","noYear":false,"title":"Hydrology and Model of North Fork Solomon River Valley, Kirwin Dam to Waconda Lake, North-Central Kansas"},"predicate":"SUPERSEDED_BY","object":{"id":70047535,"text":"70047535 - 1981 - Hydrology and model of North Fork Solomon River Valley, Kirwin Dam to Waconda Lake, north-central Kansas","indexId":"70047535","publicationYear":"1981","noYear":false,"title":"Hydrology and model of North Fork Solomon River Valley, Kirwin Dam to Waconda Lake, north-central Kansas"},"id":1}],"lastModifiedDate":"2013-08-08T15:10:13","indexId":"70047535","displayToPublicDate":"2013-01-01T14:48:00","publicationYear":"1981","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":120,"text":"Irrigation Series","active":false,"publicationSubtype":{"id":2}},"seriesNumber":"6","title":"Hydrology and model of North Fork Solomon River Valley, Kirwin Dam to Waconda Lake, north-central Kansas","docAbstract":"The alluvial valley of the North Fork Solomon River is an important agricultural area. Reservoir releases diverted below Kirwin Dam are the principal source of irrigation water. During the 1970'S, severe water shortages occurred in Kirwin Reservoir and other nearby reservoirs as a result of an extended drought. Some evidence indicates that surface-water shortages may have been the result of a change in the rainfall-runoff relationship. Examination of the rainfall-runoff relationship shows no apparent trend from 1951 to 1968, but annual records from 1969 to 1976 indicate that deficient rainfall occurred during 6 of the 8 years.\n\nGround water from the alluvial aquifer underlying the river valley also is used extensively for irrigation. Utilization of ground water for irrigation greatly increased from about 200 acre-feet in 1955 to about 12,300 acre-feet in 1976. Part of the surface water diverted for irrigation has percolated downward into the aquifer raising the ground-water level. Ground-water storage in the aquifer increased from 230,000 acre-feet in 1946 to 275,000 acre-feet in 1976-77.\n\nA digital model was used to simulate the steady-state conditions in the aquifer prior to closure of Kirwin Dam. Model results indicated that precipitation was the major source of recharge to the aquifer. The effective recharge, or gain from precipitation minus evapotranspiration, was about 11,700 acre-feet per year. The major element of discharge from the aquifer was leakage to the river. The simulated net leakage (leakage to the river minus leakage from the river) was about 11,500 acre-feet per year. The simulated value is consistent with the estimated gain in base flow of the river within the area modeled.\n\nMeasurements of seepage used to determine gain and loss to the stream were made twice during 1976. Based on these measurements and on base-flow periods identified from hydrographs, it was estimated that the ground-water discharge to the stream has increased about 4,000 acre-feet per year from 1946 to 1976. During the same period, ground water withdrawn from the aquifer increased 12,100 acre-feet per year. Hydrographs of water levels in wells indicate some withdrawal from aquifer storage during 1976, possibly as a combined result of below-normal rainfall and greatly increased pumpage. The analysis of data is inconclusive as to whether the aquifer can sustain increased groundwater development. However, the analysis does indicate that the aquifer could sustain withdrawals at the 1976 rate for several consecutive years of drought similar to the 1976 conditions.","language":"English","publisher":"Kansas Geological Survey","publisherLocation":"Lawrence, Kansas","collaboration":"Prepared by the Kansas Geological Survey and the U.S. Geological Survey","usgsCitation":"Jorgensen, D.G., and Stullken, L.E., 1981, Hydrology and model of North Fork Solomon River Valley, Kirwin Dam to Waconda Lake, north-central Kansas: Irrigation Series 6, viii, 34 p.; Maps: 2 Sheets.","productDescription":"viii, 34 p.; Maps: 2 Sheets","numberOfPages":"43","costCenters":[],"links":[{"id":276239,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/70047535.png"},{"id":276238,"type":{"id":15,"text":"Index Page"},"url":"https://www.kgs.ku.edu/Publications/Bulletins/IRR6/"}],"country":"United States","state":"Kansas","otherGeospatial":"North Fork Solomon River Valley","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -99.133333,39.466667 ], [ -99.133333,39.666667 ], [ -98.5,39.666667 ], [ -98.5,39.466667 ], [ -99.133333,39.466667 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5204bdeee4b0403aa6262a61","contributors":{"authors":[{"text":"Jorgensen, Donald G.","contributorId":19537,"corporation":false,"usgs":true,"family":"Jorgensen","given":"Donald","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":482293,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stullken, Lloyd E.","contributorId":60609,"corporation":false,"usgs":true,"family":"Stullken","given":"Lloyd","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":482294,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70038303,"text":"70038303 - 1981 - Water resources inventory of Connecticut Part 7: upper Connecticut River basin","interactions":[],"lastModifiedDate":"2014-06-27T14:07:44","indexId":"70038303","displayToPublicDate":"2012-04-29T10:03:00","publicationYear":"1981","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":108,"text":"Connecticut Water Resources Bulletin","active":false,"publicationSubtype":{"id":2}},"seriesNumber":"24","title":"Water resources inventory of Connecticut Part 7: upper Connecticut River basin","docAbstract":"<p>The 508 square miles of the upper Connecticut River basin in north-central Connecticut include the basins of four major tributaries: the Scantic, Park, and Hockanum Rivers, and the Farmington River downstream from Tariffville. Precipitation over this area averaged 44 inches per year during 1931-60. In this period, an additional 3,800 billion gallons of water per year entered the basin in the main stem of the Connecticut River at the Massachusetts state line, about 230 billion gallons per year in the Farmington River at Tariffville, and about 10 billion gallons per year in the Seantic River at the Massachusetts state line. Some water was also imported from outside the basin by water-supply systems. About half the precipitation, 22.2 inches, was lost from the basin by evapotranspiration; the remainder flowed out of the study area in the Connecticut River at Portland.</p>\n<br/>\n<p>Variations in streamflow at 41 long-term continuous-record gaging stations are summarized in standardized graphs and tables that can be used to estimate streamflow characteristics at other sites. For example, mean-flow and two low-flow characteristics: (1) the 7-day annual minimum flow for 2-year and (2) 10-year recurrence intervals, have been determined for many partial-record stations throughout the basin.</p>\n<br/>\n<p>Of the 30 principal lakes, ponds, and reservoirs, two have usable storage capacities of more than 1 billion gallons. The maximum safe draft rate (regulated flow) of the largest of these, Shenipsit Lake at Rockville, is 6.5 million gallons per day for the 2-year and 30-year recurrence intervals (median and lowest annual flow).</p>\n<br/>\n<p>Floods have occurred within each month of the year but in different years. The greatest known flood on the Connecticut River was in March 1936; it had a peak flow of 130,000 cubic feet per second at Hartford. Since then, major floods have been reduced by flood-control measures.</p>\n<br/>\n<p>The major aquifers underlying the basin are composed of unconsolidated materials (stratified drift and till) and bedrock. Stratified drift overlies till and bedrock in valleys and lowlands in the eastern and western parts and in most of the broad central valley. The stratified drift generally ranges in thickness from 10 feet in small valleys to more than 200 feet in the Connecticut River Valley. Bedrock underlies the entire basin and is composed of (1) interbedded sedimentary and igneous rocks and (2) crystalline rocks.</p>\n<br/>\n<p>Ground-water sources yield from several million gallons per day from large well fields to 1 gallon per minute from single wells. Yields of 100 gal/min or more are most commonly obtained from screened wells tapping stratified-drift aquifers; amounts can be calculated by use of a series of graphs in conjunction with estimates of aquifer transmissivity and thickness. Eighteen areas underlain by good aquifers are selected as the most favorable locations for large-scale development of ground water. Selection of these areas is based on estimates of aquifer characteristics and the amount of water potentially available from induced infiltration of streamflow at low-flow conditions.</p>\n<br/>\n<p>Small to moderate water supplies can generally be obtained from any of the aquifers. Wells in bedrock yield at least a few gallons per minute at most sites. The probability of obtaining an adequate yield for domestic supply is greater in sedimentary than in crystalline bedrock and is also greater in stratified-drift overburden than in till.</p>\n<br/>\n<p>Where unaffected by man's activities, the water is of the calcium magnesium bicarbonate type, is generally low to moderate in dissolved-solids concentration, and ranges from soft to hard. In general, streamflow is less mineralized than ground water, particularly when it consists largely of direct runoff. However, streams become more highly mineralized during low-flow conditions, when most flow consists of more highly mineralized water discharged from aquifers. The median dissolved-solids concentration in water from 25 stream sites was 113 mg/L (milligrams per liter) during high flow, and 148 mg/L during low flow within the study period. Iron and manganese occur naturally in objectionable concentrations in some streams draining swamps and in some waters draining from sedimentary bedrock which contains iron- and manganese-bearing minerals.</p>\n<br/>\n<p>Man's activities have affected the water quality of streams in much of the area, particularly in the Hockanum and Park River basins. The degradation in quality in these streams is shown by wide and erratic changes in dissolved-solids concentration, excessive amounts of trace elements, a low dissolved-oxygen content, and abnormally high temperatures. Ground water within this area is degraded principally by induced infiltration of surface water that contains chemical wastes, by leachate from wastes stored or disposed of on the ground, and by effluents discharged from septic tanks.</p>\n<br/>\n<p>The quantity and quality of water are satisfactory for a wide variety of uses, and, with suitable treatment, the water may be used for most purposes. The total amount of water used in 1968 was more than 100 billion gallons. About 80 percent of this was used for industrial purposes, and 90 percent of the industrial water was obtained from surface-water sources. About 85 percent of the population was supplied with water for domestic use by 15 major public and municipal systems and 25 private associations. Analyses of water from the 13 largest systems show generally good quality.</p>","language":"English","publisher":"Connecticut Department of Environmental Protection","collaboration":"Prepared by the U.S. Geological Survey in cooperation with the Connecticut Department of Environmental Protection","usgsCitation":"Ryder, R.B., Thomas, M.P., and Weiss, L.A., 1981, Water resources inventory of Connecticut Part 7: upper Connecticut River basin: Connecticut Water Resources Bulletin 24, Report: vii, 76 p.; 4 Plates: 37.33 x 50.45 inches and smaller.","productDescription":"Report: vii, 76 p.; 4 Plates: 37.33 x 50.45 inches and smaller","numberOfPages":"83","costCenters":[],"links":[{"id":258813,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/ctwrb/0024/report.pdf","size":"17112","linkFileType":{"id":1,"text":"pdf"}},{"id":258814,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/ctwrb/0024/report-thumb.jpg"}],"scale":"48000","country":"United States","state":"Connecticut","otherGeospatial":"Connecticut River Basin","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -72.833333,41.533333 ], [ -72.833333,42.058333 ], [ -72.366667,42.058333 ], [ -72.366667,41.533333 ], [ -72.833333,41.533333 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc907e4b08c986b32cc15","contributors":{"authors":[{"text":"Ryder, Robert B. rryder@usgs.gov","contributorId":68294,"corporation":false,"usgs":true,"family":"Ryder","given":"Robert","email":"rryder@usgs.gov","middleInitial":"B.","affiliations":[],"preferred":false,"id":463828,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thomas, Mendall P.","contributorId":104314,"corporation":false,"usgs":true,"family":"Thomas","given":"Mendall","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":463830,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weiss, Lawrence A.","contributorId":102528,"corporation":false,"usgs":true,"family":"Weiss","given":"Lawrence","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":463829,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":5221668,"text":"5221668 - 1981 - The structure of western warbler assemblages: Analysis of foraging behavior and habitat selection in Oregon","interactions":[],"lastModifiedDate":"2017-05-13T16:10:52","indexId":"5221668","displayToPublicDate":"2010-06-16T12:19:15","publicationYear":"1981","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"The structure of western warbler assemblages: Analysis of foraging behavior and habitat selection in Oregon","docAbstract":"<p>This study examines the foraging behavior and habitat selection of a MacGillivray's (<i>Oporornis tolmiei</i>)-Orange-crowned (<i>Vermivora celata</i>)-Wilson's (<i>Wilsonia pusilla</i>) warbler assemblage that occurred on early-growth clearcuts in western Oregon during breeding. Sites were divided into two groups based on the presence or absence of deciduous trees. Density estimates for each species were nearly identical between site classes except for Wilson's, whose density declined on nondeciduous tree sites. Analysis of vegetation parameters within the territories of the species identified deciduous tree cover as the variable of primary importance in the separation of warblers on each site, so that the assemblage could be arranged on a continuum of increasing deciduous tree cover. MacGillivray's and Wilson's extensively used shrub cover and deciduous tree cover, respectively; Orange-crowns were associated with both vegetation types. When the deciduous tree cover was reduced, Orange-crowns concentrated foraging activities in shrub cover and maintained nondisturbance densities. Indices of foraging-height diversity showed a marked decrease after the removal of deciduous trees. All species except MacGillivray's foraged lower in the vegatative substrate on the nondeciduous tree sites; MacGillivray's concentrated foraging activities in the low shrub cover on both sites. Indices of foraging overlap revealed a general pattern of decreased segregation by habitat after removal of deciduous trees. I suggest that the basic patterns of foraging behavior and habitat selection evidenced today in western North America were initially developed by ancestral warblers before their invasion of the west. Species successfully colonizing western habitats were probably preadapted to the conditions they encountered, with new habitats occupied without obvious evolutionary modifications.</p>","language":"English","publisher":"American Ornithological Society","usgsCitation":"Morrison, M.L., 1981, The structure of western warbler assemblages: Analysis of foraging behavior and habitat selection in Oregon: The Auk, v. 98, no. 3, p. 578-588.","productDescription":"11 p.","startPage":"578","endPage":"588","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":193411,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":341271,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://www.jstor.org/stable/4086124"}],"volume":"98","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a5fe4b07f02db634af6","contributors":{"authors":[{"text":"Morrison, Michael L.","contributorId":169013,"corporation":false,"usgs":false,"family":"Morrison","given":"Michael","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":334402,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5221680,"text":"5221680 - 1981 - The Mayfield method of estimating nesting success: A model, estimators and simulation results","interactions":[],"lastModifiedDate":"2012-02-02T00:14:44","indexId":"5221680","displayToPublicDate":"2010-06-16T12:19:13","publicationYear":"1981","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3783,"text":"The Wilson Bulletin","printIssn":"0043-5643","active":true,"publicationSubtype":{"id":10}},"title":"The Mayfield method of estimating nesting success: A model, estimators and simulation results","docAbstract":"Using a nesting model proposed by Mayfield we show that the estimator he proposes is a maximum likelihood estimator (m.l.e.).  M.l.e. theory allows us to calculate the asymptotic distribution of this estimator, and we propose an estimator of the asymptotic variance.  Using these estimators we give approximate confidence intervals and tests of significance for daily survival.  Monte Carlo simulation results show the performance of our estimators and tests under many sets of conditions.  A traditional estimator of nesting success is shown to be quite inferior to the Mayfield estimator.  We give sample sizes required for a given accuracy under several sets of conditions.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wilson Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Hensler, G.L., and Nichols, J., 1981, The Mayfield method of estimating nesting success: A model, estimators and simulation results: The Wilson Bulletin, v. 93, no. 1, p. 42-53.","productDescription":"42-53","startPage":"42","endPage":"53","numberOfPages":"12","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":18087,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://elibrary.unm.edu/sora/Wilson/v093n01/p0042-p0053.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":197384,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac8e4b07f02db67b9ad","contributors":{"authors":[{"text":"Hensler, Gary L.","contributorId":23111,"corporation":false,"usgs":true,"family":"Hensler","given":"Gary","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":334430,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nichols, J.D. 0000-0002-7631-2890","orcid":"https://orcid.org/0000-0002-7631-2890","contributorId":14332,"corporation":false,"usgs":true,"family":"Nichols","given":"J.D.","affiliations":[],"preferred":false,"id":334429,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5221705,"text":"5221705 - 1981 - Censusing wading bird colonies: An update on the 'flight-line' count method","interactions":[],"lastModifiedDate":"2023-11-20T13:00:42.223352","indexId":"5221705","displayToPublicDate":"2010-06-16T12:18:57","publicationYear":"1981","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1272,"text":"Colonial Waterbirds","printIssn":"07386028","active":false,"publicationSubtype":{"id":10}},"title":"Censusing wading bird colonies: An update on the 'flight-line' count method","docAbstract":"1. Thirteen mixed-species heronries (10 in Florida, two in Virginia, one in North Carolina) were studied in 1980 as part of a project begun in 1979 aimed at evaluating the 'flight-line' census method..2. Standardized counts of Snowy and Cattle Egrets, Louisiana and Little Blue Herons flying to and from the nesting colony were made for three hr periods, followed by a nest count of the colony.  3.Significant differences were found in the flight rates (number of birds per nest x hour) of the four species at the Chincoteague colony. However, when Cattle Egrets and Louisiana Herons were compared at all 13 colonies, their respective flight rates were in opposite rank to those at Chincoteague. Colony differences, then, may mask species differences.  4. A linear regression model showed a strong fit (R2=0.92) between the hourly flight number (3 hr means) and the nest number, but point estimates (single colony) had very large confidence limits. A given colony might be over-or underestimated by a factor of 2, using the regression equation as a predictive model.  5. A more appropriate application of the method would be to determine regionwide (e.g., state), rather than colony-specific, population estimates. 'Total' estimates for all (n= 13) colonies were within 10% of the actual nest number.","language":"English","publisher":"Waterbird Society","doi":"10.2307/1521120","usgsCitation":"Erwin, R., 1981, Censusing wading bird colonies: An update on the 'flight-line' count method: Colonial Waterbirds, v. 4, p. 91-95, https://doi.org/10.2307/1521120.","productDescription":"5 p.","startPage":"91","endPage":"95","numberOfPages":"5","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":196606,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49e5e4b07f02db5e6e95","contributors":{"authors":[{"text":"Erwin, R.M.","contributorId":57396,"corporation":false,"usgs":true,"family":"Erwin","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":334488,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5210275,"text":"5210275 - 1981 - Estimates of avian population trends from the North American Breeding Bird Survey","interactions":[],"lastModifiedDate":"2012-02-02T00:15:18","indexId":"5210275","displayToPublicDate":"2009-06-09T09:23:17","publicationYear":"1981","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"seriesNumber":"6","title":"Estimates of avian population trends from the North American Breeding Bird Survey","docAbstract":"One of the major purposes of bird population studies is to document changes in population size over a period of years.  The traditional method used in Europe and North America to detect population change is to calculate annual ratios.  However, this method can produce spurious results when ratios are accumulated over many years.  Consequently, new methods of computing trends are needed.  Several new methods of estimating population trends are developed and illustrated with data from the North American Breeding Bird Survey (BBS).  Each method is compared in terms of its assumptions, biases, and limitations.  On the basis of these comparisons we recommend one method that we feel most accurately detects true population trends. Both the biological and statistical justifications for the model selection are presented.  Trends estimated with this model are then presented for two species.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Estimating Numbers of Terrestrial Birds","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"Cooper Ornithological Society","publisherLocation":"Lawrence, KS","usgsCitation":"Geissler, P., and Noon, B., 1981, Estimates of avian population trends from the North American Breeding Bird Survey, chap. <i>of</i> Estimating Numbers of Terrestrial Birds, p. 42-51.","productDescription":"x, 630","startPage":"42","endPage":"51","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201031,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ce4b07f02db5fcb7a","contributors":{"editors":[{"text":"Ralph, C. John","contributorId":71284,"corporation":false,"usgs":true,"family":"Ralph","given":"C.","email":"","middleInitial":"John","affiliations":[],"preferred":false,"id":506217,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Scott, J. Michael","contributorId":98877,"corporation":false,"usgs":true,"family":"Scott","given":"J.","email":"","middleInitial":"Michael","affiliations":[],"preferred":false,"id":506218,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Geissler, P.H.","contributorId":24038,"corporation":false,"usgs":true,"family":"Geissler","given":"P.H.","email":"","affiliations":[],"preferred":false,"id":328117,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Noon, B.R.","contributorId":24311,"corporation":false,"usgs":true,"family":"Noon","given":"B.R.","email":"","affiliations":[],"preferred":false,"id":328118,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5210260,"text":"5210260 - 1981 - Analysis of bird survey data using a modification of Emlen's method","interactions":[],"lastModifiedDate":"2012-02-02T00:15:18","indexId":"5210260","displayToPublicDate":"2009-06-09T09:23:16","publicationYear":"1981","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Analysis of bird survey data using a modification of Emlen's method","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Estimating Numbers of Terrestrial Birds","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","usgsCitation":"Ramsey, F.L., and Scott, J.M., 1981, Analysis of bird survey data using a modification of Emlen's method, chap. <i>of</i> Estimating Numbers of Terrestrial Birds, p. 483-487.","productDescription":"x, 630","startPage":"483","endPage":"487","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":200959,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ad0e4b07f02db680a66","contributors":{"editors":[{"text":"Ralph, C. John","contributorId":71284,"corporation":false,"usgs":true,"family":"Ralph","given":"C.","email":"","middleInitial":"John","affiliations":[],"preferred":false,"id":506193,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Scott, J. Michael","contributorId":98877,"corporation":false,"usgs":true,"family":"Scott","given":"J.","email":"","middleInitial":"Michael","affiliations":[],"preferred":false,"id":506194,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Ramsey, F. L.","contributorId":92379,"corporation":false,"usgs":true,"family":"Ramsey","given":"F.","middleInitial":"L.","affiliations":[],"preferred":false,"id":328077,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Scott, J. M.","contributorId":55766,"corporation":false,"usgs":true,"family":"Scott","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":328076,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011753,"text":"70011753 - 1981 - The terminal Eocene event and the Polish connection","interactions":[],"lastModifiedDate":"2025-06-16T23:14:42.593139","indexId":"70011753","displayToPublicDate":"2003-04-15T00:00:00","publicationYear":"1981","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2996,"text":"Palaeogeography, Palaeoclimatology, Palaeoecology","printIssn":"0031-0182","active":true,"publicationSubtype":{"id":10}},"title":"The terminal Eocene event and the Polish connection","docAbstract":"<p><span>The Eocene/Oligocene boundary in Europe is marked by major discontinuities in all environments: the “Grande Coupure” in continental mammals; the elimination of semitropical elements from high-latitude floras; the virtually complete replacement of the shallow-marine malacofauna; and an extraordinary downslope excursion of carbonate deposition in deep-ocean basins (drop in the CCD). These phenomena collectively represent the “Terminal Eocene Event” (TEE). In the Carpathian Mountains, the TEE is manifested in the thin but regionally persistent&nbsp;</span><i>Globigerina</i><span>&nbsp;Marl, a calcareous unit containing abundant cool-water microplankton that occurs within very thick, siliceous, bathyal flysch sequences. In southern Poland, the marl is of very latest Eocene age, within planktonic foraminifera zone P17, calcareous nannoplankton zone NP19/20, and the zone of the dinoflagellate&nbsp;</span><i>Rhomdodinium perforatum</i><span>. Zircons from bentonites bracketing the marl are dated by fission-track analysis; at Polany, two underlying bentonites are 41.7 and 39.8 Ma, and at Znamirowice two overlying bentonites are 34.6 and 28.9 Ma, in sequence. This accords with glauconite K/Ar ages in Western Europe by which the Eo/Oligocene boundary age is estimated at 37–38 Ma. Global correlations indicate that the TEE corresponds to a major glacio-eustatic regression with a duration of about 0.5 Ma, in which a large Antarctic ice cap was formed, the ocean circulation was permanently changed to the psychrospheric condition, and world climate shifted irreversibly towards the modern state.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0031-0182(81)90111-5","issn":"00310182","usgsCitation":"Van Couvering, J.A., Aubry, M., Berggren, W., Bujak, J., Naeser, C.W., and Wieser, T., 1981, The terminal Eocene event and the Polish connection: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 36, no. 3-4, p. 321-362, https://doi.org/10.1016/0031-0182(81)90111-5.","productDescription":"42 p.","startPage":"321","endPage":"362","costCenters":[],"links":[{"id":221251,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Poland","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              14.337657367927704,\n              54.012571323156635\n            ],\n            [\n              14.337657367927704,\n              49.28513872073813\n            ],\n            [\n              24.006473984938538,\n              49.28513872073813\n            ],\n            [\n              24.006473984938538,\n              54.012571323156635\n            ],\n            [\n              14.337657367927704,\n              54.012571323156635\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"36","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb0eee4b08c986b325132","contributors":{"authors":[{"text":"Van Couvering, J. A.","contributorId":78469,"corporation":false,"usgs":true,"family":"Van Couvering","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":361883,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aubry, M.-P.","contributorId":100121,"corporation":false,"usgs":true,"family":"Aubry","given":"M.-P.","email":"","affiliations":[],"preferred":false,"id":361884,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Berggren, W.A.","contributorId":65601,"corporation":false,"usgs":true,"family":"Berggren","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":361882,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bujak, J.P.","contributorId":49928,"corporation":false,"usgs":true,"family":"Bujak","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":361881,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Naeser, C. W.","contributorId":17582,"corporation":false,"usgs":true,"family":"Naeser","given":"C.","middleInitial":"W.","affiliations":[],"preferred":false,"id":361880,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wieser, T.","contributorId":107430,"corporation":false,"usgs":true,"family":"Wieser","given":"T.","email":"","affiliations":[],"preferred":false,"id":361885,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70012108,"text":"70012108 - 1981 - Plumbotectonics-the model","interactions":[],"lastModifiedDate":"2025-08-28T16:12:38.239092","indexId":"70012108","displayToPublicDate":"2003-04-07T00:00:00","publicationYear":"1981","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3525,"text":"Tectonophysics","active":true,"publicationSubtype":{"id":10}},"title":"Plumbotectonics-the model","docAbstract":"<p>Plumbotectonics is an attempt to model the geochemical behaviour of U, Th and Pb, among major terrestrial reservoirs in agreement with observational data. By recycling rock through the orogenic environment, a dynamically communicating upper crust, lower crust, and mantle can produce the required patterns of lead-isotope evolution.&nbsp;</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0040-1951(81)90213-4","issn":"00401951","usgsCitation":"Zartman, R., and Doe, B.R., 1981, Plumbotectonics-the model: Tectonophysics, v. 75, no. 1-2, p. 135-162, https://doi.org/10.1016/0040-1951(81)90213-4.","productDescription":"28 p.","startPage":"135","endPage":"162","costCenters":[],"links":[{"id":221988,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"75","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7c94e4b0c8380cd79a76","contributors":{"authors":[{"text":"Zartman, R. E.","contributorId":15632,"corporation":false,"usgs":true,"family":"Zartman","given":"R. E.","affiliations":[],"preferred":false,"id":362751,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doe, B. R.","contributorId":52173,"corporation":false,"usgs":true,"family":"Doe","given":"B.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":362752,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012107,"text":"70012107 - 1981 - Composition of the earth's upper mantle-I. Siderophile trace elements in ultramafic nodules","interactions":[],"lastModifiedDate":"2025-08-28T16:18:02.199665","indexId":"70012107","displayToPublicDate":"2003-04-07T00:00:00","publicationYear":"1981","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3525,"text":"Tectonophysics","active":true,"publicationSubtype":{"id":10}},"title":"Composition of the earth's upper mantle-I. Siderophile trace elements in ultramafic nodules","docAbstract":"<p><span>Seven siderophile elements (Au, Ge, Ir, Ni, Pd, Os, Re) were determined by radiochemical neutron activation analysis in 19 ultramafic rocks, which are spinel lherzollites-xenoliths from North and Central America, Hawaii and Australia, and garnet Iherzolitexenoliths from Lesotho.</span></p><p><span>Abundances of the platinum metals are very uniform in spinel lherzolites averaging 3.4 ± 1.2 ppb Os, 3.7 ± 1.1 ppb Ir, and 4.6 ± 2.0 ppb Pd. Sheared garnet lherzolite PHN 1611 has similar abundances of these elements, but in 4 granulated garnet lherzolites, abundances are more variable. In all samples, the Pt metals retain cosmic ( Cl-chondrite) ratios. Abundances of Au and Re vary more than those of Pt metals, but the Au/Re ratio remains close to the cosmic value. The fact that higher values of Au and Re approach cosmic proportions with respect to the Pt metals, suggests that Au and Re have been depleted in some ultramafic rocks from an initially chondrite-like pattern equivalent to about 0.01 of Cl chondrite abundances. The relative enrichment of Au and Re in crustal rocks is apparently the result of crust—mantle fractionation and does not require a special circumstance of core—mantle partitioning.</span></p><p><span>Abundances of moderately volatile elements Ni, Co and Ge are very uniform in all rocks, and are much higher than those of the highly siderophile elements Au, Ir, Pd, Os and Re. When normalized to Cl chondrites, abundances of Ni and Co are nearly identical, averaging 0.20 ± 0.02 and 0.22 ± 0.02, respectively; but Ge is only 0.027 ± 0.004. The low abundance of Ge relative to Ni and Co is apparently a reflection of the general depletion of volatile elements in the Earth. The moderately siderophile elements cannot be derived from the same source as the highly siderophile elements because of the marked difference in Cl chondrite-normalized abundances and patterns. We suggest that most of the Ni, Co and Ge were enriched in the silicate by the partial oxidation of pre-existing volatile-poor Fe-Ni, whereas the corresponding highly siderophile elements remained sequestered by the surviving metal. The highly siderophile elements may have been introduced by a population of ~10<sup>3</sup>&nbsp;large (~10<sup>22</sup>&nbsp;g) planetisimals, similar to those forming the lunar mare basins.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0040-1951(81)90209-2","issn":"00401951","usgsCitation":"Morgan, J.W., Wandless, G., Petrie, R., and Irving, A., 1981, Composition of the earth's upper mantle-I. Siderophile trace elements in ultramafic nodules: Tectonophysics, v. 75, no. 1-2, p. 47-67, https://doi.org/10.1016/0040-1951(81)90209-2.","productDescription":"21 p.","startPage":"47","endPage":"67","costCenters":[],"links":[{"id":221930,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"75","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f92ee4b0c8380cd4d4ab","contributors":{"authors":[{"text":"Morgan, J. W.","contributorId":92384,"corporation":false,"usgs":true,"family":"Morgan","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":362749,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wandless, G.A.","contributorId":107716,"corporation":false,"usgs":true,"family":"Wandless","given":"G.A.","affiliations":[],"preferred":false,"id":362750,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Petrie, R.K.","contributorId":87266,"corporation":false,"usgs":true,"family":"Petrie","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":362748,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Irving, A.J.","contributorId":51022,"corporation":false,"usgs":true,"family":"Irving","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":362747,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
]}