The thick (≤8 km), regionally extensive section of Neoproterozoic siliciclastic strata (terrigenous detrital succession, TDS) in the central and eastern Great Basin contains sedimentary pyrite characterized by mostly high δ34S values (−11.6 to 40.8‰, >70% exceed 10‰; 51 analyses) derived from reduction of seawater sulfate, and by markedly radiogenic Pb isotopes (207Pb/204Pb >19.2; 15 analyses) acquired from clastic detritus eroded from Precambrian cratonal rocks to the east-southeast. In the overlying Paleozoic section, Pb-Zn-Cu-Ag-Au deposits associated with Jurassic, Cretaceous, and Tertiary granitic intrusions (intrusion-related metal deposits) contain galena and other sulfide minerals with S and Pb isotope compositions similar to those of TDS sedimentary pyrite, consistent with derivation of deposit S and Pb from TDS pyrite. Minor element abundances in TDS pyrite (e.g., Pb, Zn, Cu, Ag, and Au) compared to sedimentary and hydrothermal pyrite elsewhere are not noticeably elevated, implying that enrichment in source minerals is not a precondition for intrusion-related metal deposits.
Three mechanisms for transferring components of TDS sedimentary pyrite to intrusion-related metal deposits are qualitatively evaluated. One mechanism involves (1) decomposition of TDS pyrite in thermal aureoles of intruding magmas, and (2) aqueous transport and precipitation in thermal or fluid mixing gradients of isotopically heavy S, radiogenic Pb, and possibly other sedimentary pyrite and detrital mineral components, as sulfide minerals in intrusion-related metal deposits. A second mechanism invokes mixing and S isotope exchange in thermal aureoles of Pb and S exsolved from magma and derived from decomposition of sedimentary pyrite. A third mechanism entails melting of TDS strata or assimilation of TDS strata by crustal or mantle magmas. TDS-derived or assimilated magmas ascend, decompress, and exsolve a mixture of TDS volatiles, including isotopically heavy S and radiogenic Pb from sedimentary pyrite, and volatiles acquired from deeper crustal or mantle sources.
In the central and eastern Great Basin, the wide distribution and high density of small to mid-sized vein, replacement, and skarn intrusion-related metal deposits in lower Paleozoic rocks that contain TDS sedimentary pyrite S and Pb reflect (1) prolific Jurassic, Cretaceous, and Tertiary magmatism, (2) a regional, substrate reservoir of S and Pb in permeable and homogeneous siliciclastic strata, and (3) relatively small scale concentration of substrate and magmatic components. Large intrusion-related metal deposits in the central and eastern Great Basin acquired S and most Pb from thicker lithospheric sections.
","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/econgeo.106.5.883","issn":"03610128","usgsCitation":"Vikre, P., Poulson, S., and Koenig, A.E., 2011, Derivation of S and Pb in phanerozoic intrusion-related metal deposits from neoproterozoic sedimentary pyrite, Great Basin, United States: Economic Geology, v. 106, no. 5, p. 883-912, https://doi.org/10.2113/econgeo.106.5.883.","productDescription":"30 p.","startPage":"883","endPage":"912","numberOfPages":"30","ipdsId":"IP-021544","costCenters":[{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"links":[{"id":244125,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216264,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/econgeo.106.5.883"}],"volume":"106","issue":"5","noUsgsAuthors":false,"publicationDate":"2011-07-22","publicationStatus":"PW","scienceBaseUri":"5059fedce4b0c8380cd4ef6d","contributors":{"authors":[{"text":"Vikre, Peter G. pvikre@usgs.gov","contributorId":1800,"corporation":false,"usgs":true,"family":"Vikre","given":"Peter G.","email":"pvikre@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":false,"id":453438,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Poulson, S.R.","contributorId":98859,"corporation":false,"usgs":true,"family":"Poulson","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":453439,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Koenig, Alan E. 0000-0002-5230-0924 akoenig@usgs.gov","orcid":"https://orcid.org/0000-0002-5230-0924","contributorId":1564,"corporation":false,"usgs":true,"family":"Koenig","given":"Alan","email":"akoenig@usgs.gov","middleInitial":"E.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":453437,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70035845,"text":"70035845 - 2011 - No major stratigraphic gap exists near the Middle-Upper Pennsylvanian (Desmoinesian-Missourian) boundary in North America","interactions":[],"lastModifiedDate":"2021-02-10T13:18:11.052707","indexId":"70035845","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3000,"text":"Palaios","active":true,"publicationSubtype":{"id":10}},"title":"No major stratigraphic gap exists near the Middle-Upper Pennsylvanian (Desmoinesian-Missourian) boundary in North America","docAbstract":"Interregional correlation of the marine zones of major cyclothems between North America and eastern Europe does not support assertions that a major stratigraphic gap exists between the traditional regional Desmoinesian and Missourian stages in North America. Such a gap was previously proposed to explain an abrupt change in megafloral assemblages in the northern Appalachian Basin and by extension across all of North America. Conodont-based correlation from the essentially complete low-shelf Midcontinent succession (distal from the highstand shoreline), through the mid-shelf Illinois Basin, to the high shelf of the Appalachian Basin (proximal to highstand shoreline) demonstrates that all major ∼400 kyr cyclothem groupings in the Midcontinent are recognizable in the Illinois Basin. In the Appalachian Basin, however, the grouping at the base of the Missourian is represented only by paleosols and localized coal. The immediately preceding grouping was removed very locally by paleovalley incision, as is evident at the 7–11 Mine, Columbiana County, Ohio, from which the original megafloral data were derived. At the few localities where incised paleodrainage exists, there may be a gap of ∼1000 kyr, but a gap of no more than ∼600 kyr occurs elsewhere in the Appalachian Basin at that level and its magnitude progressively decreases westward into the Illinois (∼300 kyr) and Midcontinent (<200 kyr) Basins. Thus, while a gap is present near the Desmoinesian–Missourian boundary in North America, it is typically more than an order of magnitude smaller than that originally proposed and is similar to the gaps inferred at sequence boundaries between cyclothems at many horizons in the Pennsylvanian of North America.
","language":"English","publisher":"Society for Sedimentary Geology","doi":"10.2110/palo.2010.p10-049r","issn":"08831351","usgsCitation":"Falcon-Lang, H.J., Heckel, P., DiMichele, W.A., Blake, B., Easterday, C., Eble, C., Elrick, S., Gastaldo, R.A., Greb, S., Martino, R., John, N.W., Pfefferkorn, H., Phillips, T., and Rosscoe, S., 2011, No major stratigraphic gap exists near the Middle-Upper Pennsylvanian (Desmoinesian-Missourian) boundary in North America: Palaios, v. 26, no. 3, p. 125-139, https://doi.org/10.2110/palo.2010.p10-049r.","productDescription":"15 p.","startPage":"125","endPage":"139","costCenters":[],"links":[{"id":243896,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216055,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2110/palo.2010.p10-049r"}],"country":"United 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Jr.","contributorId":62430,"corporation":false,"usgs":true,"family":"Blake","given":"B.M.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":452721,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Easterday, C.R.","contributorId":44382,"corporation":false,"usgs":true,"family":"Easterday","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":452719,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Eble, C.F.","contributorId":35346,"corporation":false,"usgs":true,"family":"Eble","given":"C.F.","email":"","affiliations":[],"preferred":false,"id":452716,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Elrick, S.","contributorId":68558,"corporation":false,"usgs":true,"family":"Elrick","given":"S.","email":"","affiliations":[],"preferred":false,"id":452723,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gastaldo, Robert A.","contributorId":13389,"corporation":false,"usgs":false,"family":"Gastaldo","given":"Robert","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":452711,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Greb, S.F.","contributorId":48294,"corporation":false,"usgs":true,"family":"Greb","given":"S.F.","email":"","affiliations":[],"preferred":false,"id":452720,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Martino, R.L.","contributorId":32939,"corporation":false,"usgs":true,"family":"Martino","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":452714,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"John, Nelson W.","contributorId":34348,"corporation":false,"usgs":true,"family":"John","given":"Nelson","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":452715,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Pfefferkorn, H.W.","contributorId":18910,"corporation":false,"usgs":true,"family":"Pfefferkorn","given":"H.W.","email":"","affiliations":[],"preferred":false,"id":452713,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Phillips, T.L.","contributorId":43517,"corporation":false,"usgs":true,"family":"Phillips","given":"T.L.","email":"","affiliations":[],"preferred":false,"id":452718,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Rosscoe, S.J.","contributorId":64477,"corporation":false,"usgs":true,"family":"Rosscoe","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":452722,"contributorType":{"id":1,"text":"Authors"},"rank":14}]}} ,{"id":70035784,"text":"70035784 - 2011 - Water chemistry and its effects on the physiology and survival of Atlantic salmon Salmo salar smolts","interactions":[],"lastModifiedDate":"2021-02-11T17:54:40.665596","indexId":"70035784","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2285,"text":"Journal of Fish Biology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Water chemistry and its effects on the physiology and survival of Atlantic salmon Salmo salar smolts","title":"Water chemistry and its effects on the physiology and survival of Atlantic salmon Salmo salar smolts","docAbstract":"The physiological effects of episodic pH fluctuations on Atlantic salmon Salmo salar smolts in eastern Maine, U.S.A., were investigated. During this study, S. salar smolts were exposed to ambient stream‐water chemistry conditions at nine sites in four catchments for 3 and 6 day intervals during the spring S. salar smolt migration period. Plasma chloride, plasma glucose, gill aluminium and gill Na+‐ and K+‐ATPase levels in S. salar smolts were assessed in relation to ambient stream‐water chemistry during this migration period. Changes in both plasma chloride and plasma glucose levels of S. salar smolts were strongly correlated with stream pH, and S. salar smolt mortality occurred in one study site with ambient stream pH between 5·6 and 5·8 during the study period. The findings from this study suggest that physiological effects on S. salar smolts are strongly correlated with stream pH and that in rivers and streams with low dissolved organic carbon (DOC) concentrations the threshold for physiological effects and mortality probably occurs at a higher pH and shorter exposure period than in rivers with higher DOC. Additionally, whenever an acidification event in which pH drops below 5·9 coincides with S. salar smolt migration in eastern Maine rivers, there is potential for a significant reduction in plasma ions of S. salar smolts.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1095-8649.2011.03046.x","usgsCitation":"Liebich, T., McCormick, S., Kircheis, D., Johnson, K., Regal, R., and Hrabik, T., 2011, Water chemistry and its effects on the physiology and survival of Atlantic salmon Salmo salar smolts: Journal of Fish Biology, v. 79, no. 2, p. 502-519, https://doi.org/10.1111/j.1095-8649.2011.03046.x.","productDescription":"18 p.","startPage":"502","endPage":"519","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":243893,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Maine","otherGeospatial":"Eastern Maine rivers","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -69.598388671875,\n 44.24519901522129\n ],\n [\n -69.19189453125,\n 43.59630591596548\n ],\n [\n -67.43408203124999,\n 44.402391829093915\n ],\n [\n -68.13720703125,\n 45.042478050891546\n ],\n [\n -69.598388671875,\n 44.24519901522129\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"79","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-07-22","publicationStatus":"PW","scienceBaseUri":"505bc7cfe4b08c986b32c636","contributors":{"authors":[{"text":"Liebich, T.","contributorId":63237,"corporation":false,"usgs":true,"family":"Liebich","given":"T.","email":"","affiliations":[],"preferred":false,"id":452361,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCormick, S. D. 0000-0003-0621-6200","orcid":"https://orcid.org/0000-0003-0621-6200","contributorId":20278,"corporation":false,"usgs":true,"family":"McCormick","given":"S. D.","affiliations":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"preferred":false,"id":452358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kircheis, D.","contributorId":27290,"corporation":false,"usgs":true,"family":"Kircheis","given":"D.","email":"","affiliations":[],"preferred":false,"id":452359,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Johnson, Kevin","contributorId":83287,"corporation":false,"usgs":true,"family":"Johnson","given":"Kevin","affiliations":[],"preferred":false,"id":452363,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Regal, R.","contributorId":71029,"corporation":false,"usgs":true,"family":"Regal","given":"R.","email":"","affiliations":[],"preferred":false,"id":452362,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hrabik, T.","contributorId":36777,"corporation":false,"usgs":true,"family":"Hrabik","given":"T.","email":"","affiliations":[],"preferred":false,"id":452360,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70035783,"text":"70035783 - 2011 - Vegetation death and rapid loss of surface elevation in two contrasting Mississippi delta salt marshes: The role of sedimentation, autocompaction and sea-level rise","interactions":[],"lastModifiedDate":"2021-02-10T19:03:23.794702","indexId":"70035783","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1454,"text":"Ecological Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Vegetation death and rapid loss of surface elevation in two contrasting Mississippi delta salt marshes: The role of sedimentation, autocompaction and sea-level rise","docAbstract":"From 1990 to 2004, we carried out a study on accretionary dynamics and wetland loss in salt marshes surrounding two small ponds in the Mississippi delta; Old Oyster Bayou (OB), a sediment-rich area near the mouth of the Atchafalaya River and Bayou Chitigue (BC), a sediment-poor area about 70 km to the east. The OB site was stable, while most of the marsh at BC disappeared within a few years. Measurements were made of short-term sedimentation, vertical accretion, change in marsh surface elevation, pond wave activity, and marsh soil characteristics. The OB marsh was about 10 cm higher than BC; the extremes of the elevation range for Spartina alterniflora in Louisiana. Vertical accretion and short-term sedimentation were about twice as high at BC than at OB, but the OB marsh captured nearly all sediments deposited, while the BC marsh captured <30%. The OB and BC sites flooded about 15% and 85% of the time, respectively. Marsh loss at BC was not due to wave erosion. The mineral content of deposited sediments was higher at OB. Exposure and desiccation of the marsh surface at OB increased the efficiency that deposited sediments were incorporated into the marsh soil, and displaced the marsh surface upward by biological processes like root growth, while also reducing shallow compaction. Once vegetation dies, there is a loss of soil volume due to loss of root turgor and oxidation of root organic matter, which leads to elevation collapse. Revegetation cannot occur because of the low elevation and weak soil strength. The changes in elevation at both marsh sites are punctuated, occurring in steps that can either increase or decrease elevation. When a marsh is low as at BC, a step down can result in an irreversible change. At this point, the option is not restoration but creating a new marsh with massive sediment input either from the river or via dredging.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.ecoleng.2010.11.021","issn":"09258574","usgsCitation":"Day, J., Kemp, G., Reed, D., Cahoon, D.R., Boumans, R., Suhayda, J., and Gambrell, R., 2011, Vegetation death and rapid loss of surface elevation in two contrasting Mississippi delta salt marshes: The role of sedimentation, autocompaction and sea-level rise: Ecological Engineering, v. 37, no. 2, p. 229-240, https://doi.org/10.1016/j.ecoleng.2010.11.021.","productDescription":"12 p.","startPage":"229","endPage":"240","costCenters":[],"links":[{"id":243892,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216051,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecoleng.2010.11.021"}],"country":"United States","state":"Lousianna","otherGeospatial":"Mississippi delta salt marshes","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -92.35107421874999,\n 28.57487404744697\n ],\n [\n -89.05517578125,\n 28.57487404744697\n ],\n [\n -89.05517578125,\n 31.16580958786196\n ],\n [\n -92.35107421874999,\n 31.16580958786196\n ],\n [\n -92.35107421874999,\n 28.57487404744697\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"37","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc1d3e4b08c986b32a7a3","contributors":{"authors":[{"text":"Day, J.W.","contributorId":27417,"corporation":false,"usgs":true,"family":"Day","given":"J.W.","affiliations":[],"preferred":false,"id":452351,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kemp, G.P.","contributorId":43196,"corporation":false,"usgs":true,"family":"Kemp","given":"G.P.","email":"","affiliations":[],"preferred":false,"id":452353,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reed, D.J.","contributorId":40949,"corporation":false,"usgs":true,"family":"Reed","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":452352,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cahoon, Donald R. 0000-0002-2591-5667","orcid":"https://orcid.org/0000-0002-2591-5667","contributorId":65424,"corporation":false,"usgs":true,"family":"Cahoon","given":"Donald","email":"","middleInitial":"R.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true},{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"preferred":false,"id":452356,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boumans, R.M.","contributorId":45923,"corporation":false,"usgs":true,"family":"Boumans","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":452354,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Suhayda, J.M.","contributorId":53621,"corporation":false,"usgs":true,"family":"Suhayda","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":452355,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Gambrell, R.","contributorId":93301,"corporation":false,"usgs":true,"family":"Gambrell","given":"R.","email":"","affiliations":[],"preferred":false,"id":452357,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70035754,"text":"70035754 - 2011 - Spatial and temporal trends of selected trace elements in liver tissue from polar bears (Ursus maritimus) from Alaska, Canada and Greenland","interactions":[],"lastModifiedDate":"2021-02-10T21:08:03.610029","indexId":"70035754","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2259,"text":"Journal of Environmental Monitoring","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Spatial and temporal trends of selected trace elements in liver tissue from polar bears (Ursus maritimus) from Alaska, Canada and Greenland","title":"Spatial and temporal trends of selected trace elements in liver tissue from polar bears (Ursus maritimus) from Alaska, Canada and Greenland","docAbstract":"Spatial trends and comparative changes in time of selected trace elements were studied in liver tissue from polar bears from ten different subpopulation locations in Alaska, Canadian Arctic and East Greenland. For nine of the trace elements (As, Cd, Cu, Hg, Mn, Pb, Rb, Se and Zn) spatial trends were investigated in 136 specimens sampled during 2005–2008 from bears from these ten subpopulations. Concentrations of Hg, Se and As were highest in the (northern and southern) Beaufort Sea area and lowest in (western and southern) Hudson Bay area and Chukchi/Bering Sea. In contrast, concentrations of Cd showed an increasing trend from east to west. Minor or no spatial trends were observed for Cu, Mn, Rb and Zn. Spatial trends were in agreement with previous studies, possibly explained by natural phenomena. To assess temporal changes of Cd, Hg, Se and Zn concentrations during the last decades, we compared our results to previously published data. These time comparisons suggested recent Hg increase in East Greenland polar bears. This may be related to Hg emissions and/or climate-induced changes in Hg cycles or changes in the polar bear food web related to global warming. Also, Hg : Se molar ratio has increased in East Greenland polar bears, which suggests there may be an increased risk for Hg2+-mediated toxicity. Since the underlying reasons for spatial trends or changes in time of trace elements in the Arctic are still largely unknown, future studies should focus on the role of changing climate and trace metal emissions on geographical and temporal trends of trace elements.
","language":"English","publisher":"Royal Society of Chemistry","doi":"10.1039/c1em10088b","usgsCitation":"Routti, H., Letcher, R., Born, E.W., Branigan, M., Dietz, R., Evans, T., Fisk, A.T., Peacock, E.L., and Sonne, C., 2011, Spatial and temporal trends of selected trace elements in liver tissue from polar bears (Ursus maritimus) from Alaska, Canada and Greenland: Journal of Environmental Monitoring, v. 13, no. 8, p. 2260-2267, https://doi.org/10.1039/c1em10088b.","productDescription":"8 p.","startPage":"2260","endPage":"2267","costCenters":[],"links":[{"id":243950,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States, Canada, Greenland","state":"Alasksa","otherGeospatial":"Alaska, Canada and Greenland","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -169.45312499999997,\n 57.326521225217064\n ],\n [\n -37.265625,\n 57.326521225217064\n ],\n [\n -37.265625,\n 85.34532513469132\n ],\n [\n -169.45312499999997,\n 85.34532513469132\n ],\n [\n -169.45312499999997,\n 57.326521225217064\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"13","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b944be4b08c986b31a9ad","contributors":{"authors":[{"text":"Routti, Heli","contributorId":56879,"corporation":false,"usgs":false,"family":"Routti","given":"Heli","email":"","affiliations":[{"id":7238,"text":"Norwegian Polar Institute","active":true,"usgs":false}],"preferred":false,"id":452203,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Letcher, Robert J.","contributorId":25292,"corporation":false,"usgs":true,"family":"Letcher","given":"Robert J.","affiliations":[],"preferred":false,"id":452198,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Born, Erik W.","contributorId":8379,"corporation":false,"usgs":false,"family":"Born","given":"Erik","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":452197,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Branigan, Marsha","contributorId":55236,"corporation":false,"usgs":false,"family":"Branigan","given":"Marsha","email":"","affiliations":[{"id":33080,"text":"Environment and Natural Resources, Government of Northwest Territories, Inuvik, NT, Canada","active":true,"usgs":false}],"preferred":false,"id":452202,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Dietz, Rune","contributorId":41741,"corporation":false,"usgs":true,"family":"Dietz","given":"Rune","affiliations":[],"preferred":false,"id":452199,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Evans, Thomas J.","contributorId":174904,"corporation":false,"usgs":false,"family":"Evans","given":"Thomas J.","affiliations":[{"id":13235,"text":"U.S. Fish and Wildlife Service, Marine Mammals Management","active":true,"usgs":false}],"preferred":false,"id":452205,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Fisk, Aaron T.","contributorId":127340,"corporation":false,"usgs":false,"family":"Fisk","given":"Aaron","email":"","middleInitial":"T.","affiliations":[{"id":6778,"text":"University of Windsor, Windsor, Ontario, Canada","active":true,"usgs":false}],"preferred":false,"id":452200,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Peacock, Elizabeth L. 0000-0001-7279-0329 lpeacock@usgs.gov","orcid":"https://orcid.org/0000-0001-7279-0329","contributorId":3361,"corporation":false,"usgs":true,"family":"Peacock","given":"Elizabeth","email":"lpeacock@usgs.gov","middleInitial":"L.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":false,"id":452201,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Sonne, Christian","contributorId":28527,"corporation":false,"usgs":true,"family":"Sonne","given":"Christian","affiliations":[],"preferred":false,"id":452204,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70035705,"text":"70035705 - 2011 - Critical nitrogen deposition loads in high-elevation lakes of the western US inferred from paleolimnological records","interactions":[],"lastModifiedDate":"2021-02-16T21:05:54.464629","indexId":"70035705","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3728,"text":"Water, Air, & Soil Pollution","onlineIssn":"1573-2932","printIssn":"0049-6979","active":true,"publicationSubtype":{"id":10}},"title":"Critical nitrogen deposition loads in high-elevation lakes of the western US inferred from paleolimnological records","docAbstract":"Critical loads of nitrogen (N) from atmospheric deposition were determined for alpine lake ecosystems in the western US using fossil diatom assemblages in lake sediment cores. Changes in diatom species over the last century were indicative of N enrichment in two areas, the eastern Sierra Nevada, starting between 1960 and 1965, and the Greater Yellowstone Ecosystem, starting in 1980. In contrast, no changes in diatom community structure were apparent in lakes of Glacier National Park. To determine critical N loads that elicited these community changes, we modeled wet nitrogen deposition rates for the period in which diatom shifts first occurred in each area using deposition data spanning from 1980 to 2007. We determined a critical load of 1.4 kg N ha−1 year−1 wet N deposition to elicit key nutrient enrichment effects on diatom communities in both the eastern Sierra Nevada and the Greater Yellowstone Ecosystem.
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Within the hierarchy, larger scale variables influence the characteristics of the next lower nested scale. Ecoregions represent one of the largest scales in the fluvial hierarchy and are defined by recurring patterns of geology, climate, land use, soils, and potential natural vegetation. Watersheds, the next largest scale, are often nested into a single ecoregion and therefore have properties that are indicative of a given ecoregion. Differences in watershed morphology (relief, drainage density, circularity ratio, relief ratio, and ruggedness number) were evaluated among three ecoregions in eastern Oklahoma: Ozark Highlands, Boston Mountains, and Ouachita Mountains. These ecoregions were selected because of their high-quality stream resources and diverse aquatic communities and are of special management interest to the Oklahoma Department of Wildlife Conservation. One hundred thirty-four watersheds in first- through fourth-order streams were compared. Using a nonparametric, two-factor analysis of variance (α= 0.05) we concluded that the relief, drainage density, relief ratio, and ruggedness number all changed among ecoregion and stream order, whereas circularity ratio only changed with stream order. Our study shows that ecoregions can be used as a broad-scale framework for watershed management.
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One method of investigating the behaviour of the Greenland and the Antarctic ice sheets in a warmer-than-modern climate is to look back at past warm periods of Earth history, for example the Pliocene. This paper presents climate and ice sheet modelling results for the mid-Pliocene warm period (mPWP; 3.3 to 3.0 million years ago), which has been identified as a key interval for understanding warmer-than-modern climates (Jansen et al., 2007). Using boundary conditions supplied by the United States Geological Survey PRISM Group (Pliocene Research, Interpretation and Synoptic Mapping), the Hadley Centre coupled ocean–atmosphere climate model (HadCM3) and the British Antarctic Survey Ice Sheet Model (BASISM), we show large reductions in the Greenland and East Antarctic Ice Sheets (GrIS and EAIS) compared to modern in standard mPWP experiments. We also present the first results illustrating the variability of the ice sheets due to realistic orbital forcing during the mid-Pliocene. While GrIS volumes are lower than modern under even the most extreme (cold) mid-Pliocene orbit (losing at least 35% of its ice mass), the EAIS can both grow and shrink, losing up to 20% or gaining up to 10% of its present-day volume. The changes in ice sheet volume incurred by altering orbital forcing alone means that global sea level can vary by more than 25 m during the mid-Pliocene. However, we have also shown that the response of the ice sheets to mPWP orbital hemispheric forcing can be in anti-phase, whereby the greatest reductions in EAIS volume are concurrent with the smallest reductions of the GrIS. If this anti-phase relationship is in operation throughout the mPWP, then the total eustatic sea level response would be dampened compared to the ice sheet fluctuations that are theoretically possible. This suggests that maximum eustatic sea level rise does not correspond to orbital maxima, but occurs at times where the anti-phasing of Northern and Southern Hemisphere ice sheet retreat is minimised.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Palaeogeography, Palaeoclimatology, Palaeoecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/j.palaeo.2011.03.030","issn":"00310182","usgsCitation":"Dolan, A., Haywood, A., Hill, D., Dowsett, H., Hunter, S., Lunt, D., and Pickering, S., 2011, Sensitivity of Pliocene ice sheets to orbital forcing: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 309, no. 1-2, p. 98-110, https://doi.org/10.1016/j.palaeo.2011.03.030.","productDescription":"13 p.","startPage":"98","endPage":"110","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"links":[{"id":216343,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.palaeo.2011.03.030"},{"id":244207,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"309","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d28e4b08c986b3182a3","contributors":{"authors":[{"text":"Dolan, A.M.","contributorId":40818,"corporation":false,"usgs":true,"family":"Dolan","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":451811,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haywood, A.M.","contributorId":101050,"corporation":false,"usgs":true,"family":"Haywood","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":451813,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hill, D.J.","contributorId":102291,"corporation":false,"usgs":true,"family":"Hill","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":451814,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dowsett, H.J. 0000-0003-1983-7524","orcid":"https://orcid.org/0000-0003-1983-7524","contributorId":87924,"corporation":false,"usgs":true,"family":"Dowsett","given":"H.J.","affiliations":[],"preferred":false,"id":451812,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hunter, S.J.","contributorId":27704,"corporation":false,"usgs":true,"family":"Hunter","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":451810,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lunt, D.J.","contributorId":105127,"corporation":false,"usgs":true,"family":"Lunt","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":451815,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Pickering, S.J.","contributorId":6283,"corporation":false,"usgs":true,"family":"Pickering","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":451809,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70035484,"text":"70035484 - 2011 - Grassland bird use of oak barrens and dry prairies in Wisconsin","interactions":[],"lastModifiedDate":"2017-05-10T15:28:44","indexId":"70035484","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2821,"text":"Natural Areas Journal","active":true,"publicationSubtype":{"id":10}},"title":"Grassland bird use of oak barrens and dry prairies in Wisconsin","docAbstract":"Grassland bird populations have declined more than any other group of birds in North America and are of conservation concern to state and federal agencies. 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Though found at lower relative abundances, horned larks (Erephila alpestris), savannah sparrows (Passerculus sandwichensis), and upland sandpipers (Bartramia longicauda) were found at higher relative abundances as patch size increased. Patch vegetation was important for some species. Vesper sparrows were found at higher abundances in patches with shorter, less dense vegetation and higher woody cover, eastern meadowlark (Sturnella magna) relative abundances were higher in patches with higher proportions of grass, and dickcissel (Spiza americana) relative abundances were higher in patches with taller, denser vegetation and lower proportions of litter. Native habitats are important for grassland bird species of management concern and large patches are particularly important for some of them.
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M.","contributorId":15425,"corporation":false,"usgs":false,"family":"Vos","given":"Susan","email":"","middleInitial":"M.","affiliations":[{"id":13018,"text":"Department of Forest and Wildlife Ecology, University of Wisconsin, Madison","active":true,"usgs":false}],"preferred":false,"id":450858,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ribic, Christine A. caribic@usgs.gov","contributorId":831,"corporation":false,"usgs":true,"family":"Ribic","given":"Christine","email":"caribic@usgs.gov","middleInitial":"A.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":450857,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70035432,"text":"70035432 - 2011 - Correlation between deep fluids, tremor and creep along the central San Andreas fault","interactions":[],"lastModifiedDate":"2017-06-30T10:04:18","indexId":"70035432","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Correlation between deep fluids, tremor and creep along the central San Andreas fault","docAbstract":"The seismicity pattern along the San Andreas fault near Parkfield and Cholame, California, varies distinctly over a length of only fifty kilometres. Within the brittle crust, the presence of frictionally weak minerals, fault-weakening high fluid pressures and chemical weakening are considered possible causes of an anomalously weak fault northwest of Parkfield. Non-volcanic tremor from lower-crustal and upper-mantle depths is most pronounced about thirty kilometres southeast of Parkfield and is thought to be associated with high pore-fluid pressures at depth. Here we present geophysical evidence of fluids migrating into the creeping section of the San Andreas fault that seem to originate in the region of the uppermost mantle that also stimulates tremor, and evidence that along-strike variations in tremor activity and amplitude are related to strength variations in the lower crust and upper mantle. Interconnected fluids can explain a deep zone of anomalously low electrical resistivity that has been imaged by magnetotelluric data southwest of the Parkfield-Cholame segment. Near Cholame, where fluids seem to be trapped below a high-resistivity cap, tremor concentrates adjacent to the inferred fluids within a mechanically strong zone of high resistivity. By contrast, subvertical zones of low resistivity breach the entire crust near the drill hole of the San Andreas Fault Observatory at Depth, northwest of Parkfield, and imply pathways for deep fluids into the eastern fault block, coincident with a mechanically weak crust and the lower tremor amplitudes in the lower crust. Fluid influx to the fault system is consistent with hypotheses of fault-weakening high fluid pressures in the brittle crust.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer Nature","doi":"10.1038/nature10609","issn":"00280836","usgsCitation":"Becken, M., Ritter, O., Bedrosian, P.A., and Weckmann, U., 2011, Correlation between deep fluids, tremor and creep along the central San Andreas fault: Nature, v. 480, no. 7375, p. 87-90, https://doi.org/10.1038/nature10609.","productDescription":"4 p.","startPage":"87","endPage":"90","ipdsId":"IP-026054","costCenters":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"links":[{"id":475177,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://gfzpublic.gfz-potsdam.de/pubman/item/item_244276","text":"External Repository"},{"id":243242,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215435,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/nature10609"}],"country":"United States","state":"California","otherGeospatial":"San Andreas fault","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -121.3275146484375,\n 35.31064272673245\n ],\n [\n -120.07781982421875,\n 35.31064272673245\n ],\n [\n -120.07781982421875,\n 36.28856319836237\n ],\n [\n -121.3275146484375,\n 36.28856319836237\n ],\n [\n -121.3275146484375,\n 35.31064272673245\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"480","issue":"7375","noUsgsAuthors":false,"publicationDate":"2011-11-30","publicationStatus":"PW","scienceBaseUri":"5059fc29e4b0c8380cd4e157","contributors":{"authors":[{"text":"Becken, M.","contributorId":79718,"corporation":false,"usgs":true,"family":"Becken","given":"M.","email":"","affiliations":[],"preferred":false,"id":450636,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ritter, O.","contributorId":33515,"corporation":false,"usgs":true,"family":"Ritter","given":"O.","email":"","affiliations":[],"preferred":false,"id":450635,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bedrosian, P. A.","contributorId":100109,"corporation":false,"usgs":true,"family":"Bedrosian","given":"P.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":450637,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Weckmann, U.","contributorId":14186,"corporation":false,"usgs":true,"family":"Weckmann","given":"U.","email":"","affiliations":[],"preferred":false,"id":450634,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70035394,"text":"70035394 - 2011 - Shallow conduit system at Kilauea Volcano, Hawaii, revealed by seismic signals associated with degassing bursts","interactions":[],"lastModifiedDate":"2012-12-10T16:10:47","indexId":"70035394","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Shallow conduit system at Kilauea Volcano, Hawaii, revealed by seismic signals associated with degassing bursts","docAbstract":"Eruptive activity at the summit of Kilauea Volcano, Hawaii, beginning in March, 2008 and continuing to the present time is characterized by episodic explosive bursts of gas and ash from a vent within Halemaumau Pit Crater. These bursts are accompanied by seismic signals that are well recorded by a broadband network deployed in the summit caldera. We investigate in detail the dimensions and oscillation modes of the source of a representative burst in the 1−10 s band. An extended source is realized by a set of point sources distributed on a grid surrounding the source centroid, where the centroid position and source geometry are fixed from previous modeling of very-long-period (VLP) data in the 10–50 s band. The source time histories of all point sources are obtained simultaneously through waveform inversion carried out in the frequency domain. Short-scale noisy fluctuations of the source time histories between adjacent sources are suppressed with a smoothing constraint, whose strength is determined through a minimization of the Akaike Bayesian Information Criterion (ABIC). Waveform inversions carried out for homogeneous and heterogeneous velocity structures both image a dominant source component in the form of an east trending dike with dimensions of 2.9 × 2.9 km. The dike extends ∼2 km west and ∼0.9 km east of the VLP centroid and spans the depth range 0.2–3.1 km. The source model for a homogeneous velocity structure suggests the dike is hinged at the source centroid where it bends from a strike E 27°N with northern dip of 85° west of the centroid, to a strike E 7°N with northern dip of 80° east of the centroid. The oscillating behavior of the dike is dominated by simple harmonic modes with frequencies ∼0.2 Hz and ∼0.5 Hz, representing the fundamental mode ν11 and first degenerate mode ν12 = ν21 of the dike. Although not strongly supported by data in the 1–10 s band, a north striking dike segment is required for enhanced compatibility with the model elaborated in the 10–50 s band. This dike provides connectivity between the east trending dike and the new vent within Halemaumau Pit Crater. Waveform inversions with a dual-dike model suggest dimensions of 0.7 × 0.7 km to 2.6 × 2.6 km for this segment. Further elaboration of the complex dike system under Halemaumau does not appear to be feasible with presently available data.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research B: Solid Earth","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2011JB008677","issn":"01480227","usgsCitation":"Chouet, B., and Dawson, P., 2011, Shallow conduit system at Kilauea Volcano, Hawaii, revealed by seismic signals associated with degassing bursts: Journal of Geophysical Research B: Solid Earth, v. 116, no. 12, https://doi.org/10.1029/2011JB008677.","productDescription":"22 p.","startPage":"B12317","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":487252,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2011jb008677","text":"Publisher Index Page"},{"id":215229,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2011JB008677"},{"id":243018,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawai'i","otherGeospatial":"Kilauea Volcano","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -155.798371,19.056854 ], [ -155.798371,19.550464 ], [ -155.016307,19.550464 ], [ -155.016307,19.056854 ], [ -155.798371,19.056854 ] ] ] } } ] }","volume":"116","issue":"12","noUsgsAuthors":false,"publicationDate":"2011-12-29","publicationStatus":"PW","scienceBaseUri":"505b8e1ae4b08c986b31872d","contributors":{"authors":[{"text":"Chouet, Bernard","contributorId":65485,"corporation":false,"usgs":true,"family":"Chouet","given":"Bernard","affiliations":[],"preferred":false,"id":450449,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dawson, Phillip","contributorId":21780,"corporation":false,"usgs":true,"family":"Dawson","given":"Phillip","affiliations":[],"preferred":false,"id":450448,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70035298,"text":"70035298 - 2011 - Impacts of agricultural land use on biological integrity: A causal analysis","interactions":[],"lastModifiedDate":"2021-02-25T18:59:27.608483","indexId":"70035298","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Impacts of agricultural land use on biological integrity: A causal analysis","docAbstract":"Agricultural land use has often been linked to nutrient enrichment, habitat degradation, hydrologic alteration, and loss of biotic integrity in streams. The U.S. Geological Survey's National Water Quality Assessment Program sampled 226 stream sites located in eight agriculture‐dominated study units across the United States to investigate the geographic variability and causes of agricultural impacts on stream biotic integrity. In this analysis we used structural equation modeling (SEM) to develop a national and set of regional causal models linking agricultural land use to measured instream conditions. We then examined the direct, indirect, and total effects of agriculture on biotic integrity as it acted through multiple water quality and habitat pathways. In our nation‐wide model, cropland affected benthic communities by both altering structural habitats and by imposing water quality‐related stresses. Region‐specific modeling demonstrated that geographic context altered the relative importance of causal pathways through which agricultural activities affected stream biotic integrity. Cropland had strong negative total effects on the invertebrate community in the national, Midwest, and Western models, but a very weak effect in the Eastern Coastal Plain model. In the Western Arid and Eastern Coastal Plain study regions, cropland impacts were transmitted primarily through dissolved water quality contaminants, but in the Midwestern region, they were transmitted primarily through particulate components of water quality. Habitat effects were important in the Western Arid model, but negligible in the Midwest and Eastern Coastal Plain models. The relative effects of riparian forested wetlands also varied regionally, having positive effects on biotic integrity in the Eastern Coastal Plain and Western Arid region models, but no statistically significant effect in the Midwest. These differences in response to cropland and riparian cover suggest that best management practices and planning for the mitigation of agricultural land use impacts on stream ecosystems should be regionally focused.
","language":"English","publisher":"Ecological Society of America","doi":"10.1890/11-0077.1","issn":"10510761","usgsCitation":"Riseng, C., Wiley, M., Black, R.W., and Munn, M., 2011, Impacts of agricultural land use on biological integrity: A causal analysis: Ecological Applications, v. 21, no. 8, p. 3128-3146, https://doi.org/10.1890/11-0077.1.","productDescription":"19 p.","startPage":"3128","endPage":"3146","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":622,"text":"Washington Water Science Center","active":true,"usgs":true}],"links":[{"id":475137,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/2027.42/116919","text":"External Repository"},{"id":383621,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a38e0e4b0c8380cd61706","contributors":{"authors":[{"text":"Riseng, C.M.","contributorId":9481,"corporation":false,"usgs":true,"family":"Riseng","given":"C.M.","email":"","affiliations":[],"preferred":false,"id":450072,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wiley, M.J.","contributorId":68976,"corporation":false,"usgs":true,"family":"Wiley","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":450073,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Black, Robert W. 0000-0002-4748-8213 rwblack@usgs.gov","orcid":"https://orcid.org/0000-0002-4748-8213","contributorId":1820,"corporation":false,"usgs":true,"family":"Black","given":"Robert","email":"rwblack@usgs.gov","middleInitial":"W.","affiliations":[{"id":622,"text":"Washington Water Science Center","active":true,"usgs":true}],"preferred":true,"id":450075,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Munn, M.D.","contributorId":77908,"corporation":false,"usgs":true,"family":"Munn","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":450074,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70035055,"text":"70035055 - 2011 - Pennsylvanian coniferopsid forests in sabkha facies reveal the nature of seasonal tropical biome","interactions":[],"lastModifiedDate":"2021-03-02T19:52:43.832278","indexId":"70035055","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Pennsylvanian coniferopsid forests in sabkha facies reveal the nature of seasonal tropical biome","docAbstract":"Pennsylvanian fossil forests are known from hundreds of sites across tropical Pangea, but nearly all comprise remains of humid Coal Forests. Here we report a unique occurrence of seasonally dry vegetation, preserved in growth position along >5 km of strike, in the Pennsylvanian (early Kasimovian, Missourian) of New Mexico (United States). Analyses of stump anatomy, diameter, and spatial density, coupled with observations of vascular traces and associated megaflora, show that this was a deciduous, mixed-age, coniferopsid woodland (∼100 trees per hectare) with an open canopy. The coniferopsids colonized coastal sabkha facies and show tree rings, confirming growth under seasonally dry conditions. Such woodlands probably served as the source of coniferopsids that replaced Coal Forests farther east in central Pangea during drier climate phases. Thus, the newly discovered woodland helps unravel biome-scale vegetation dynamics and allows calibration of climate models.
","language":"English","publisher":"Geological Society of America.","doi":"10.1130/G31764.1","issn":"00917613","usgsCitation":"Falcon-Lang, H.J., Jud, N., John, N.W., DiMichele, W.A., Chaney, D., and Lucas, S.G., 2011, Pennsylvanian coniferopsid forests in sabkha facies reveal the nature of seasonal tropical biome: Geology, v. 39, no. 4, p. 371-374, https://doi.org/10.1130/G31764.1.","productDescription":"4 p.","startPage":"371","endPage":"374","costCenters":[],"links":[{"id":243253,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215446,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G31764.1"}],"country":"United States","state":"New Mexico","county":"Socorro","otherGeospatial":"New Mexico","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -107.852783203125,\n 33.578014746143985\n ],\n [\n -106.01806640624999,\n 33.578014746143985\n ],\n [\n -106.01806640624999,\n 34.72355492704221\n ],\n [\n -107.852783203125,\n 34.72355492704221\n ],\n [\n -107.852783203125,\n 33.578014746143985\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"39","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7653e4b0c8380cd7804d","contributors":{"authors":[{"text":"Falcon-Lang, H. J.","contributorId":41220,"corporation":false,"usgs":true,"family":"Falcon-Lang","given":"H.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":449064,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jud, N.A.","contributorId":97727,"corporation":false,"usgs":true,"family":"Jud","given":"N.A.","email":"","affiliations":[],"preferred":false,"id":449068,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"John, Nelson W.","contributorId":34348,"corporation":false,"usgs":true,"family":"John","given":"Nelson","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":449063,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"DiMichele, William A.","contributorId":97631,"corporation":false,"usgs":true,"family":"DiMichele","given":"William","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":449067,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Chaney, D.S.","contributorId":47106,"corporation":false,"usgs":true,"family":"Chaney","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":449065,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lucas, S. G.","contributorId":76934,"corporation":false,"usgs":true,"family":"Lucas","given":"S.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":449066,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70035054,"text":"70035054 - 2011 - Rapid reaction of nanomolar Mn(II) with superoxide radical in seawater and simulated freshwater","interactions":[],"lastModifiedDate":"2021-03-02T20:06:50.512484","indexId":"70035054","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Rapid reaction of nanomolar Mn(II) with superoxide radical in seawater and simulated freshwater","docAbstract":"Superoxide radical (O2−) has been proposed to be an important participant in oxidation−reduction reactions of metal ions in natural waters. Here, we studied the reaction of nanomolar Mn(II) with O2− in seawater and simulated freshwater, using chemiluminescence detection of O2− to quantify the effect of Mn(II) on the decay kinetics of O2−. With 3−24 nM added [Mn(II)] and <0.7 nM [O2−], we observed effective second-order rate constants for the reaction of Mn(II) with O2− of 6 × 106 to 1 × 107 M−1·s−1 in various seawater samples. In simulated freshwater (pH 8.6), the effective rate constant of Mn(II) reaction with O2− was somewhat lower, 1.6 × 106 M−1·s−1. With higher initial [O2−], in excess of added [Mn(II)], catalytic decay of O2− by Mn was observed, implying that a Mn(II/III) redox cycle occurred. Our results show that reactions with nanomolar Mn(II) could be an important sink of O2− in natural waters. In addition, reaction of Mn(II) with superoxide could maintain a significant fraction of dissolved Mn in the +III oxidation state.
","language":"English","publisher":"American Chemical Society","doi":"10.1021/es104014s","issn":"0013936X","usgsCitation":"Hansard, S., Easter, H., and Voelker, B.M., 2011, Rapid reaction of nanomolar Mn(II) with superoxide radical in seawater and simulated freshwater: Environmental Science & Technology, v. 45, no. 7, p. 2811-2817, https://doi.org/10.1021/es104014s.","productDescription":"7 p.","startPage":"2811","endPage":"2817","costCenters":[],"links":[{"id":243252,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215445,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es104014s"}],"volume":"45","issue":"7","noUsgsAuthors":false,"publicationDate":"2011-03-04","publicationStatus":"PW","scienceBaseUri":"505a94fbe4b0c8380cd8172e","contributors":{"authors":[{"text":"Hansard, S.P.","contributorId":19391,"corporation":false,"usgs":true,"family":"Hansard","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":449060,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Easter, H.D.","contributorId":107123,"corporation":false,"usgs":true,"family":"Easter","given":"H.D.","email":"","affiliations":[],"preferred":false,"id":449062,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Voelker, Bettina M.","contributorId":74914,"corporation":false,"usgs":false,"family":"Voelker","given":"Bettina","email":"","middleInitial":"M.","affiliations":[{"id":12444,"text":"Massachusetts Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":449061,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70034962,"text":"70034962 - 2011 - Micropaleontologic record of Quaternary paleoenvironments in the Central Albemarle Embayment, North Carolina, U.S.A.","interactions":[],"lastModifiedDate":"2021-03-03T20:51:31.213254","indexId":"70034962","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","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":"Micropaleontologic record of Quaternary paleoenvironments in the Central Albemarle Embayment, North Carolina, U.S.A.","docAbstract":"To understand the temporal and spatial variation of eustatic sea-level fluctuations, glacio–hydro–isostacy, tectonics, subsidence, geologic environments and sedimentation patterns for the Quaternary of a passive continental margin, a nearly complete stratigraphic record that is fully integrated with a three dimensional chronostratigraphic framework, and paleoenvironmental information are necessary. The Albemarle Embayment, a Cenozoic regional depositional basin in eastern North Carolina located on the southeast Atlantic coast of the USA, is an ideal setting to unravel these dynamic, interrelated processes.
Micropaleontological data, coupled with sedimentologic, chronostratigraphic and seismic data provide the bases for detailed interpretations of paleoenvironmental evolution and paleoclimates in the 90 m thick Quaternary record of the Albemarle Embayment. The data presented here come from a transect of cores drilled through a barrier island complex in the central Albemarle Embayment. This area sits in a ramp-like setting between late Pleistocene incised valleys.
The data document the episodic infilling of the Albemarle Embayment throughout the Quaternary as a series of transgressive–regressive (T–R) cycles, characterized by inner shelf, midshelf, and shoreface assemblages, that overlie remnants of fluvial to estuarine valley-fill. Barrier island and marginal marine deposits have a low preservation potential. Inner to mid-shelf deposits of the early Pleistocene are overlain by similar middle Pleistocene shelf sediments in the south of the study area but entirely by inner shelf deposits in the north. Late Pleistocene marine sediments are of inner shelf origin and Holocene deposits are marginal marine in nature. Pleistocene marine sediments are incised, particularly in the northern half of the embayment by lowstand paleovalleys, partly filled by fluvial/floodplain deposits and in some cases, overlain by remnants of transgressive estuarine sediments. The shallowing through time of Quaternary sediments reflects the eastward progradational geometry of the continental shelf.
The preservation potential of marginal marine deposits (barrier island, shoreface, backbarrier deposits) is not high, except in topographic lows associated with late Pleistocene paleovalleys and inlets because the current interglacial highstand has not yet reached its highest level. Given the documented increase in rate of relative sea-level rise in this region, shallow marine conditions are likely to return to the central Albemarle Embayment in the near future.
","language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/j.palaeo.2011.03.004","issn":"00310182","usgsCitation":"Culver, S., Farrell, K.M., Mallinson, D., Willard, D.A., Horton, B.P., Riggs, S., Thieler, E.R., Wehmiller, J.F., Parham, P., Snyder, S.W., and Hillier, C., 2011, Micropaleontologic record of Quaternary paleoenvironments in the Central Albemarle Embayment, North Carolina, U.S.A.: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 305, no. 1-4, p. 227-249, https://doi.org/10.1016/j.palaeo.2011.03.004.","productDescription":"23 p.","startPage":"227","endPage":"249","additionalOnlineFiles":"N","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"links":[{"id":243809,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215972,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.palaeo.2011.03.004"}],"country":"United States","state":"North Carolina","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -84.462890625,\n 35.02999636902566\n ],\n [\n -82.96875,\n 35.10193405724606\n ],\n [\n -81.5625,\n 35.17380831799959\n ],\n [\n -80.947265625,\n 35.10193405724606\n ],\n [\n -79.89257812499999,\n 34.95799531086792\n ],\n [\n -78.31054687499999,\n 33.578014746143985\n ],\n [\n -75.05859375,\n 36.10237644873644\n ],\n [\n -76.025390625,\n 36.59788913307022\n ],\n [\n -81.650390625,\n 36.4566360115962\n ],\n [\n -82.96875,\n 35.88905007936091\n ],\n [\n -84.19921875,\n 35.53222622770337\n ],\n [\n -84.462890625,\n 35.02999636902566\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"305","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a568de4b0c8380cd6d684","contributors":{"authors":[{"text":"Culver, Stephen J.","contributorId":79331,"corporation":false,"usgs":true,"family":"Culver","given":"Stephen J.","affiliations":[],"preferred":false,"id":448607,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Farrell, Kathleen M.","contributorId":64476,"corporation":false,"usgs":true,"family":"Farrell","given":"Kathleen","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":448605,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mallinson, David J.","contributorId":74222,"corporation":false,"usgs":true,"family":"Mallinson","given":"David J.","affiliations":[],"preferred":false,"id":448606,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Willard, Debra A. 0000-0003-4878-0942 dwillard@usgs.gov","orcid":"https://orcid.org/0000-0003-4878-0942","contributorId":2076,"corporation":false,"usgs":true,"family":"Willard","given":"Debra","email":"dwillard@usgs.gov","middleInitial":"A.","affiliations":[{"id":24693,"text":"Climate Research and Development","active":true,"usgs":true},{"id":411,"text":"National Climate Change and Wildlife Science Center","active":true,"usgs":true}],"preferred":true,"id":448599,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Horton, Benjamin P.","contributorId":63641,"corporation":false,"usgs":true,"family":"Horton","given":"Benjamin","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":448604,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Riggs, Stanley R.","contributorId":25983,"corporation":false,"usgs":true,"family":"Riggs","given":"Stanley R.","affiliations":[],"preferred":false,"id":448601,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Thieler, E. Robert 0000-0003-4311-9717 rthieler@usgs.gov","orcid":"https://orcid.org/0000-0003-4311-9717","contributorId":2488,"corporation":false,"usgs":true,"family":"Thieler","given":"E.","email":"rthieler@usgs.gov","middleInitial":"Robert","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":448600,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Wehmiller, John F.","contributorId":42220,"corporation":false,"usgs":true,"family":"Wehmiller","given":"John","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":448602,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Parham, Peter","contributorId":102294,"corporation":false,"usgs":true,"family":"Parham","given":"Peter","email":"","affiliations":[],"preferred":false,"id":448609,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Snyder, Scott W.","contributorId":101109,"corporation":false,"usgs":true,"family":"Snyder","given":"Scott","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":448608,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Hillier, Caroline","contributorId":47193,"corporation":false,"usgs":true,"family":"Hillier","given":"Caroline","email":"","affiliations":[],"preferred":false,"id":448603,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}} ,{"id":70034936,"text":"70034936 - 2011 - Seasonal distribution of Gulf of Mexico sturgeon in the pensacola bay system, Florida","interactions":[],"lastModifiedDate":"2021-03-04T12:50:47.509992","indexId":"70034936","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2166,"text":"Journal of Applied Ichthyology","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal distribution of Gulf of Mexico sturgeon in the pensacola bay system, Florida","docAbstract":"Temporal and spatial distributions of Gulf of Mexico (Gulf) sturgeon Acipenser oxyrinchus desotoi were assessed in the Pensacola bay system, Florida, using stationary ultrasonic telemetry. Fifty‐eight Gulf sturgeon were tagged within the Escambia (n = 26), Yellow (n = 8), Blackwater (n = 12) and Choctawhatchee Rivers (n = 12) in June, July, September and October, 2005. Fifty‐four Gulf sturgeon were detected at least once during the study. Migration of sturgeon occurred throughout the bay system in fall, to various winter habitats in the Gulf of Mexico and Santa Rosa Sound. In spring, tagged sturgeon migrated back through the bay system to summer habitats in rivers. Based on the duration and number of detections, Gulf sturgeon primarily used the upper portions of East and Escambia Bays as migration routes in and out of all rivers during spring and summer and inhabited the lower portion of Pensacola Bay for longer durations in fall and winter. Specific areas within the Pensacola bay system were used in summer and winter that were not previously documented as essential sturgeon habitat. Areas in southeastern Pensacola Bay were heavily used during winter by a large portion of the population. Gulf sturgeon also exhibited long‐term winter residency in Santa Rosa Sound for two consecutive years. An area in northeastern Escambia Bay supported Gulf sturgeon during the summer, which was unexpected and can not be explained by the data from this study. However, the discovery that Gulf sturgeon remain in the bay during the summer has important ecological and management implications that need further investigation.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1439-0426.2011.01724.x","issn":"01758659","usgsCitation":"Duncan, M., Wrege, B., Parauka, F.M., and Isely, J.J., 2011, Seasonal distribution of Gulf of Mexico sturgeon in the pensacola bay system, Florida: Journal of Applied Ichthyology, v. 27, no. 2, p. 316-321, https://doi.org/10.1111/j.1439-0426.2011.01724.x.","productDescription":"6 p.","startPage":"316","endPage":"321","costCenters":[],"links":[{"id":475528,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1439-0426.2011.01724.x","text":"Publisher Index Page"},{"id":243836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","otherGeospatial":"Pensacola Bay system","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -88.3740234375,\n 27.508271413876017\n ],\n [\n -84.88037109375,\n 27.508271413876017\n ],\n [\n -84.88037109375,\n 30.80791068136646\n ],\n [\n -88.3740234375,\n 30.80791068136646\n ],\n [\n -88.3740234375,\n 27.508271413876017\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"27","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-03-28","publicationStatus":"PW","scienceBaseUri":"505b8894e4b08c986b316a40","contributors":{"authors":[{"text":"Duncan, M.S.","contributorId":99750,"corporation":false,"usgs":true,"family":"Duncan","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":448397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wrege, B.M.","contributorId":100405,"corporation":false,"usgs":true,"family":"Wrege","given":"B.M.","affiliations":[],"preferred":false,"id":448398,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parauka, Frank M.","contributorId":47115,"corporation":false,"usgs":true,"family":"Parauka","given":"Frank","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":448395,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Isely, J. Jeffery","contributorId":97224,"corporation":false,"usgs":true,"family":"Isely","given":"J.","email":"","middleInitial":"Jeffery","affiliations":[],"preferred":false,"id":448396,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70034906,"text":"70034906 - 2011 - Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region","interactions":[],"lastModifiedDate":"2021-03-08T20:40:08.694304","indexId":"70034906","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":860,"text":"Aquatic Biology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Dispersal and behavior of Pacific halibut hippoglossus stenolepis in the Bering Sea and Aleutian islands region","title":"Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region","docAbstract":"Currently, it is assumed that eastern Pacific halibut Hippoglossus stenolepis belong to a single, fully mixed population extending from California through the Bering Sea, in which adult halibut disperse randomly throughout their range during their lifetime. However, we hypothesize that halibut dispersal is more complex than currently assumed and is not spatially random. To test this hypothesis, we studied the seasonal dispersal and behavior of Pacific halibut in the Bering Sea and Aleutian Islands (BSAI). Pop-up Archival Transmitting tags attached to halibut (82 to 154 cm fork length) during the summer provided no evidence that individuals moved out of the Bering Sea and Aleutian Islands region into the Gulf of Alaska during the mid-winter spawning season, supporting the concept that this region contains a separate spawning group of adult halibut. There was evidence for geographically localized groups of halibut along the Aleutian Island chain, as all of the individuals tagged there displayed residency, with their movements possibly impeded by tidal currents in the passes between islands. Mid-winter aggregation areas of halibut are assumed to be spawning grounds, of which 2 were previously unidentified and extend the species’ presumed spawning range ~1000 km west and ~600 km north of the nearest documented spawning area. If there are indeed independent spawning groups of Pacific halibut in the BSAI, their dynamics may vary sufficiently from those of the Gulf of Alaska, so that specifically accounting for their relative segregation and unique dynamics within the larger population model will be necessary for correctly predicting how these components may respond to fishing pressure and changing environmental conditions.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Aquatic Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Inter-Research Science Publisher","doi":"10.3354/ab00333","issn":"18647782","usgsCitation":"Seitz, A., Loher, T., Norcross, B.L., and Nielsen, J.L., 2011, Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region: Aquatic Biology, v. 12, no. 3, p. 225-239, https://doi.org/10.3354/ab00333.","productDescription":"15 p.","startPage":"225","endPage":"239","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":475205,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/ab00333","text":"Publisher Index Page"},{"id":243868,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216029,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/ab00333"}],"country":"United States","state":"Alaska","otherGeospatial":"Bering Sea and Aleutian Islands","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -179.82421875,\n 49.83798245308484\n ],\n [\n -159.521484375,\n 49.83798245308484\n ],\n [\n -159.521484375,\n 59.489726035537075\n ],\n [\n -179.82421875,\n 59.489726035537075\n ],\n [\n -179.82421875,\n 49.83798245308484\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"12","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0217e4b0c8380cd4fe9e","contributors":{"authors":[{"text":"Seitz, A.C.","contributorId":71756,"corporation":false,"usgs":true,"family":"Seitz","given":"A.C.","email":"","affiliations":[],"preferred":false,"id":448259,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Loher, Timothy","contributorId":26130,"corporation":false,"usgs":false,"family":"Loher","given":"Timothy","email":"","affiliations":[{"id":33614,"text":"International Pacific Halibut Comission","active":true,"usgs":false}],"preferred":false,"id":448258,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Norcross, Brenda L.","contributorId":21497,"corporation":false,"usgs":false,"family":"Norcross","given":"Brenda","email":"","middleInitial":"L.","affiliations":[{"id":7211,"text":"University of Alaska, Fairbanks","active":true,"usgs":false}],"preferred":false,"id":448257,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nielsen, Jennifer L.","contributorId":43722,"corporation":false,"usgs":true,"family":"Nielsen","given":"Jennifer","email":"","middleInitial":"L.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":448260,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70034868,"text":"70034868 - 2011 - Reconciling multiple data sources to improve accuracy of large-scale prediction of forest disease incidence","interactions":[],"lastModifiedDate":"2021-03-10T12:57:46.160131","indexId":"70034868","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Reconciling multiple data sources to improve accuracy of large-scale prediction of forest disease incidence","docAbstract":"Ecological spatial data often come from multiple sources, varying in extent and accuracy. We describe a general approach to reconciling such data sets through the use of the Bayesian hierarchical framework. This approach provides a way for the data sets to borrow strength from one another while allowing for inference on the underlying ecological process. We apply this approach to study the incidence of eastern spruce dwarf mistletoe (Arceuthobium pusillum) in Minnesota black spruce (Picea mariana). A Minnesota Department of Natural Resources operational inventory of black spruce stands in northern Minnesota found mistletoe in 11% of surveyed stands, while a small, specific‐pest survey found mistletoe in 56% of the surveyed stands. We reconcile these two surveys within a Bayesian hierarchical framework and predict that 35–59% of black spruce stands in northern Minnesota are infested with dwarf mistletoe.
","language":"English","publisher":"Ecological Society of America","doi":"10.1890/09-1549.1","issn":"10510761","usgsCitation":"Hanks, E., Hooten, M., and Baker, F., 2011, Reconciling multiple data sources to improve accuracy of large-scale prediction of forest disease incidence: Ecological Applications, v. 21, no. 4, p. 1173-1188, https://doi.org/10.1890/09-1549.1.","productDescription":"16 p.","startPage":"1173","endPage":"1188","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":243802,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -97.20703125,\n 48.99463598353405\n ],\n [\n -96.92138671875,\n 47.517200697839414\n ],\n [\n -96.767578125,\n 46.31658418182218\n ],\n [\n -92.17529296875,\n 46.08847179577592\n ],\n [\n -92.1533203125,\n 46.694667307773116\n ],\n [\n -90.81298828125,\n 47.56170075451973\n ],\n [\n -89.56054687499999,\n 47.81315451752768\n ],\n [\n -91.0546875,\n 48.40003249610685\n ],\n [\n -94.482421875,\n 48.980216985374994\n ],\n [\n -95.2734375,\n 49.49667452747045\n ],\n [\n -97.20703125,\n 48.99463598353405\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"21","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a96a0e4b0c8380cd820de","contributors":{"authors":[{"text":"Hanks, E.M.","contributorId":104305,"corporation":false,"usgs":true,"family":"Hanks","given":"E.M.","email":"","affiliations":[],"preferred":false,"id":448073,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hooten, Mevin 0000-0002-1614-723X mhooten@usgs.gov","orcid":"https://orcid.org/0000-0002-1614-723X","contributorId":2958,"corporation":false,"usgs":true,"family":"Hooten","given":"Mevin","email":"mhooten@usgs.gov","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true},{"id":12963,"text":"Colorado Cooperative Fish and Wildlife Research Unit, Fort Collins, CO","active":true,"usgs":false}],"preferred":true,"id":448071,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Baker, F.A.","contributorId":103894,"corporation":false,"usgs":true,"family":"Baker","given":"F.A.","email":"","affiliations":[],"preferred":false,"id":448072,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70034839,"text":"70034839 - 2011 - Regional and climatic controls on seasonal dust deposition in the southwestern U.S.","interactions":[],"lastModifiedDate":"2021-03-10T21:10:08.14344","indexId":"70034839","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":666,"text":"Aeolian Research","active":true,"publicationSubtype":{"id":10}},"title":"Regional and climatic controls on seasonal dust deposition in the southwestern U.S.","docAbstract":"Vertical dust deposition rates (dust flux) are a complex response to the interaction of seasonal precipitation, wind, changes in plant cover and land use, dust source type, and local vs. distant dust emission in the southwestern U.S. Seasonal dust flux in the Mojave–southern Great Basin (MSGB) deserts, measured from 1999 to 2008, is similar in summer–fall and winter–spring, and antecedent precipitation tends to suppress dust flux in winter–spring. In contrast, dust flux in the eastern Colorado Plateau (ECP) region is much larger in summer–fall than in winter–spring, and twice as large as in the MSGB. ECP dust is related to wind speed, and in the winter–spring to antecedent moisture. Higher summer dust flux in the ECP is likely due to gustier winds and runoff during monsoonal storms when temperature is also higher. Source types in the MSGB and land use in the ECP have important effects on seasonal dust flux. In the MSGB, wet playas produce salt-rich dust during wetter seasons, whereas antecedent and current moisture suppress dust emission from alluvial and dry-playa sources during winter–spring. In the ECP under drought conditions, dust flux at a grazed-and-plowed site increased greatly, and also increased at three annualized, previously grazed sites. Dust fluxes remained relatively consistent at ungrazed and currently grazed sites that have maintained perennial vegetation cover. Under predicted scenarios of future climate change, these results suggest that an increase in summer storms may increase dust flux in both areas, but resultant effects will depend on source type, land use, and vegetation cover.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.aeolia.2011.03.008","issn":"18759637","usgsCitation":"Reheis, M.C., and Urban, F., 2011, Regional and climatic controls on seasonal dust deposition in the southwestern U.S.: Aeolian Research, v. 3, no. 1, p. 3-21, https://doi.org/10.1016/j.aeolia.2011.03.008.","productDescription":"19 p.","startPage":"3","endPage":"21","costCenters":[],"links":[{"id":243800,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215963,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.aeolia.2011.03.008"}],"country":"United States","state":"Arizona, California, Nevada, Utah","otherGeospatial":"Southwestern U.S.","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.72949218749999,\n 32.602361666817515\n ],\n [\n -110.36865234374999,\n 32.602361666817515\n ],\n [\n -110.36865234374999,\n 38.048091067457236\n ],\n [\n -117.72949218749999,\n 38.048091067457236\n ],\n [\n -117.72949218749999,\n 32.602361666817515\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a49fe4b0e8fec6cdbbc8","contributors":{"authors":[{"text":"Reheis, Marith C. 0000-0002-8359-323X mreheis@usgs.gov","orcid":"https://orcid.org/0000-0002-8359-323X","contributorId":138571,"corporation":false,"usgs":true,"family":"Reheis","given":"Marith","email":"mreheis@usgs.gov","middleInitial":"C.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true},{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":447886,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Urban, Frank 0000-0002-1329-1703 furban@usgs.gov","orcid":"https://orcid.org/0000-0002-1329-1703","contributorId":127827,"corporation":false,"usgs":true,"family":"Urban","given":"Frank","email":"furban@usgs.gov","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":447885,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70034760,"text":"70034760 - 2011 - Sequence stratigraphy and a revised sea-level curve for the Middle Devonian of eastern North America","interactions":[],"lastModifiedDate":"2021-03-16T12:02:56.254942","indexId":"70034760","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","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":"Sequence stratigraphy and a revised sea-level curve for the Middle Devonian of eastern North America","docAbstract":"The well-exposed Middle Devonian rocks of the Appalachian foreland basin (Onondaga Formation; Hamilton Group, Tully Formation, and the Genesee Group of New York State) preserve one of the most detailed records of high-order sea-level oscillation cycles for this time period in the world. Detailed examination of coeval units in distal areas of the Appalachian Basin, as well as portions of the Michigan and Illinois basins, has revealed that the pattern of high-order sea-level oscillations documented in the New York–Pennsylvania section can be positively identified in all areas of eastern North America where coeval units are preserved. The persistence of the pattern of high-order sea-level cycles across such a wide geographic area suggests that these cycles are allocyclic in nature with primary control on deposition being eustatic sea-level oscillation, as opposed to autocylic controls, such as sediment supply, which would be more local in their manifestation. There is strong evidence from studies of cyclicity and spectral analysis that these cycles are also related to Milankovitch orbital variations, with the short and long-term eccentricity cycles (100 kyr and 405 kyr) being the dominant oscillations in many settings. Relative sea-level oscillations of tens of meters are likely and raise considerable issues about the driving mechanism, given that the Middle Devonian appears to record a greenhouse phase of Phanerozoic history. These new correlations lend strong support to a revised high-resolution sea-level oscillation curve for the Middle Devonian for the eastern portion of North America. Recognized third-order sequences are: Eif-1 lower Onondaga Formation, Eif-2: upper Onondaga and Union Springs formations; Eif–Giv: Oatka Creek Formation; Giv-1: Skaneateles, Giv-2: Ludlowville, Giv-3: lower Moscow, Giv-4: upper Moscow–lower Tully, and Giv-5: middle Tully–Geneseo formations. Thus, in contrast with the widely cited eustatic curve of Johnson et al. (1985), which recognizes just one major transgressive–regressive (T–R) cycle in the early–mid Givetian (If) prior to the major late Givetian Taghanic unconformity (IIa, upper Tully–Geneseo Shale), we recognize four T–R cycles: If (restricted), Ig, Ih, and Ii. We surmise that third-order sequences record eustatic sea-level fluctuations of tens of meters with periodicities of 0.8–2 myr, while their medial-scale (fourth-order) subdivisions record lesser variations primarily of 405 kyr duration (long-term eccentricity). This high-resolution record of sea-level change provides strong evidence for high-order eustatic cycles with probable Milankovitch periodicities, despite the fact that no direct evidence for Middle Devonian glacial sediments has been found to date.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.palaeo.2010.10.009","issn":"00310182","usgsCitation":"Brett, C.E., Baird, G., Bartholomew, A., DeSantis, M., and Ver Straeten, C.A., 2011, Sequence stratigraphy and a revised sea-level curve for the Middle Devonian of eastern North America: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 304, no. 1-2, p. 21-53, https://doi.org/10.1016/j.palaeo.2010.10.009.","productDescription":"33 p.","startPage":"21","endPage":"53","costCenters":[],"links":[{"id":243487,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States, Canada","state":"Wisconsin, Illinois, Michigan, Indiana, Kentucky, Tennessee, Ohio, Pennsylvania, New York","otherGeospatial":"Eastern North America","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -91.93359375,\n 45.89000815866184\n ],\n [\n -90.791015625,\n 43.197167282501276\n ],\n [\n -90.615234375,\n 42.48830197960227\n ],\n [\n -90.439453125,\n 41.04621681452063\n ],\n [\n -90.966796875,\n 40.17887331434696\n ],\n [\n -89.82421875,\n 38.272688535980976\n ],\n [\n -89.033203125,\n 37.16031654673677\n ],\n [\n -90,\n 35.24561909420681\n ],\n [\n -84.287109375,\n 35.24561909420681\n ],\n [\n -82.880859375,\n 36.31512514748051\n ],\n [\n -83.75976562499999,\n 37.020098201368114\n ],\n [\n -82.705078125,\n 38.54816542304656\n ],\n [\n -81.298828125,\n 40.04443758460856\n ],\n [\n -75.673828125,\n 39.977120098439634\n ],\n [\n -75.322265625,\n 41.705728515237524\n ],\n [\n -73.212890625,\n 42.293564192170095\n ],\n [\n -73.30078125,\n 44.77793589631623\n ],\n [\n -74.8828125,\n 44.84029065139799\n ],\n [\n -79.541015625,\n 44.902577996288876\n ],\n [\n -82.705078125,\n 45.706179285330855\n ],\n [\n -85.078125,\n 46.13417004624326\n ],\n [\n -86.923828125,\n 44.96479793033101\n ],\n [\n -87.71484375,\n 45.336701909968134\n ],\n [\n -90.615234375,\n 46.619261036171515\n ],\n [\n -91.7578125,\n 46.73986059969267\n ],\n [\n -91.93359375,\n 45.89000815866184\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"304","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d4ce4b08c986b31832d","contributors":{"authors":[{"text":"Brett, Carlton E.","contributorId":85774,"corporation":false,"usgs":true,"family":"Brett","given":"Carlton","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":447462,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baird, G.C.","contributorId":59631,"corporation":false,"usgs":true,"family":"Baird","given":"G.C.","email":"","affiliations":[],"preferred":false,"id":447461,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bartholomew, A.J.","contributorId":18198,"corporation":false,"usgs":true,"family":"Bartholomew","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":447458,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"DeSantis, M.K.","contributorId":28824,"corporation":false,"usgs":true,"family":"DeSantis","given":"M.K.","email":"","affiliations":[],"preferred":false,"id":447459,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ver Straeten, C. A.","contributorId":53984,"corporation":false,"usgs":false,"family":"Ver Straeten","given":"C.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":447460,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70034757,"text":"70034757 - 2011 - Infrasound from the 2007 fissure eruptions of Kīlauea Volcano, Hawai'i","interactions":[],"lastModifiedDate":"2018-10-30T09:37:06","indexId":"70034757","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Infrasound from the 2007 fissure eruptions of Kīlauea Volcano, Hawai'i","docAbstract":"Varied acoustic signals were recorded at Kīlauea Volcano in mid-2007, coincident with dramatic changes in the volcano's activity. Prior to this time period, Pu'u 'Ō'ō crater produced near-continuous infrasonic tremor and was the primary source of degassing and lava effusion at Kīlauea. Collapse and draining of Pu'u 'Ō'ō crater in mid-June produced impulsive infrasonic signals and fluctuations in infrasonic tremor. Fissure eruptions on 19 June and 21 July were clearly located spatially and temporally using infrasound arrays. The 19 June eruption from a fissure approximately mid-way between Kīlauea's summit and Pu'u 'O'o produced infrasound for ~30 minutes-the only observed geophysical signal associated with the fissure opening. The infrasound signal from the 21 July eruption just east of Pu'u 'Ō'ō shows a clear azimuthal progression over time, indicative of fissure propagation over 12.9 hours. The total fissure propagation rate is relatively slow at 164 m/hr, although the fissure system ruptured discontinuously. Individual fissure rupture times are estimated using the acoustic data combined with visual observations.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2010GL046422","issn":"00948276","usgsCitation":"Fee, D., Garces, M., Orr, T., and Poland, M.P., 2011, Infrasound from the 2007 fissure eruptions of Kīlauea Volcano, Hawai'i: Geophysical Research Letters, v. 38, 5 p.; L06309, https://doi.org/10.1029/2010GL046422.","productDescription":"5 p.; L06309","costCenters":[{"id":336,"text":"Hawaiian Volcano Observatory","active":false,"usgs":true}],"links":[{"id":475169,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2010gl046422","text":"Publisher Index Page"},{"id":215635,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2010GL046422"},{"id":243452,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawai'i","otherGeospatial":"Kilauea Volcano","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -155.05,19.58 ], [ -155.05,19.76 ], [ -155.03,19.76 ], [ -155.03,19.58 ], [ -155.05,19.58 ] ] ] } } ] }","volume":"38","noUsgsAuthors":false,"publicationDate":"2011-03-30","publicationStatus":"PW","scienceBaseUri":"505a3bcae4b0c8380cd62839","contributors":{"authors":[{"text":"Fee, D.","contributorId":23353,"corporation":false,"usgs":true,"family":"Fee","given":"D.","email":"","affiliations":[],"preferred":false,"id":447441,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garces, M.","contributorId":42406,"corporation":false,"usgs":true,"family":"Garces","given":"M.","email":"","affiliations":[],"preferred":false,"id":447443,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Orr, Tim R. 0000-0003-1157-7588","orcid":"https://orcid.org/0000-0003-1157-7588","contributorId":26365,"corporation":false,"usgs":true,"family":"Orr","given":"Tim R.","affiliations":[{"id":336,"text":"Hawaiian Volcano Observatory","active":false,"usgs":true}],"preferred":true,"id":447442,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Poland, Michael P. 0000-0001-5240-6123 mpoland@usgs.gov","orcid":"https://orcid.org/0000-0001-5240-6123","contributorId":146118,"corporation":false,"usgs":true,"family":"Poland","given":"Michael","email":"mpoland@usgs.gov","middleInitial":"P.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":447444,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70034633,"text":"70034633 - 2011 - Sources and Delivery of Nutrients to the Northwestern Gulf of Mexico from Streams in the South-Central United States","interactions":[],"lastModifiedDate":"2021-04-14T17:22:26.259382","indexId":"70034633","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Sources and Delivery of Nutrients to the Northwestern Gulf of Mexico from Streams in the South-Central United States","docAbstract":"SPAtially Referenced Regressions On Watershed attributes (SPARROW) models were developed to estimate nutrient inputs [total nitrogen (TN) and total phosphorus (TP)] to the northwestern part of the Gulf of Mexico from streams in the South‐Central United States (U.S.). This area included drainages of the Lower Mississippi, Arkansas‐White‐Red, and Texas‐Gulf hydrologic regions. The models were standardized to reflect nutrient sources and stream conditions during 2002. Model predictions of nutrient loads (mass per time) and yields (mass per area per time) generally were greatest in streams in the eastern part of the region and along reaches near the Texas and Louisiana shoreline. The Mississippi River and Atchafalaya River watersheds, which drain nearly two‐thirds of the conterminous U.S., delivered the largest nutrient loads to the Gulf of Mexico, as expected. However, the three largest delivered TN yields were from the Trinity River/Galveston Bay, Calcasieu River, and Aransas River watersheds, while the three largest delivered TP yields were from the Calcasieu River, Mermentau River, and Trinity River/Galveston Bay watersheds. Model output indicated that the three largest sources of nitrogen from the region were atmospheric deposition (42%), commercial fertilizer (20%), and livestock manure (unconfined, 17%). The three largest sources of phosphorus were commercial fertilizer (28%), urban runoff (23%), and livestock manure (confined and unconfined, 23%).
","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.2011.00583.x","issn":"1093474X","usgsCitation":"Rebich, R.A., Houston, N.A., Mize, S.V., Pearson, D., Ging, P.B., and Evan, H.C., 2011, Sources and Delivery of Nutrients to the Northwestern Gulf of Mexico from Streams in the South-Central United States: Journal of the American Water Resources Association, v. 47, no. 5, p. 1061-1086, https://doi.org/10.1111/j.1752-1688.2011.00583.x.","productDescription":"26 p.","startPage":"1061","endPage":"1086","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":475372,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1752-1688.2011.00583.x","text":"Publisher Index Page"},{"id":243543,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215721,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2011.00583.x"}],"country":"United States","state":"Texas, Oklahoma, Arkansas, Louisiana, Missouri, Kansas, Mississippi, Colorado, Missouri, Tennessee","otherGeospatial":"South-Central United States","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -103.0078125,\n 32.175612478499325\n ],\n [\n -101.337890625,\n 30.751277776257812\n ],\n [\n -99.49218749999999,\n 30.221101852485987\n ],\n [\n -98.87695312499999,\n 28.22697003891834\n ],\n [\n -98.61328125,\n 26.194876675795218\n ],\n [\n -97.294921875,\n 26.03704188651584\n ],\n [\n -96.767578125,\n 28.459033019728043\n ],\n [\n -95.625,\n 28.69058765425071\n ],\n [\n -94.130859375,\n 29.53522956294847\n ],\n [\n -92.98828125,\n 29.611670115197377\n ],\n [\n -90,\n 28.998531814051795\n ],\n [\n -89.20898437499999,\n 30.221101852485987\n ],\n [\n -91.0546875,\n 31.27855085894653\n ],\n [\n -90.439453125,\n 33.578014746143985\n ],\n [\n -89.12109375,\n 34.88593094075317\n ],\n [\n -89.20898437499999,\n 36.527294814546245\n ],\n [\n -91.0546875,\n 37.09023980307208\n ],\n [\n -93.251953125,\n 37.23032838760387\n ],\n [\n -95.2734375,\n 38.20365531807149\n ],\n [\n -105.64453124999999,\n 38.47939467327645\n ],\n [\n -105.29296874999999,\n 37.579412513438385\n ],\n [\n -104.32617187499999,\n 36.31512514748051\n ],\n [\n -103.88671875,\n 34.161818161230386\n ],\n [\n -103.0078125,\n 32.175612478499325\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"47","issue":"5","noUsgsAuthors":false,"publicationDate":"2011-08-22","publicationStatus":"PW","scienceBaseUri":"505b934ce4b08c986b31a40f","contributors":{"authors":[{"text":"Rebich, Richard A. 0000-0003-4256-7171 rarebich@usgs.gov","orcid":"https://orcid.org/0000-0003-4256-7171","contributorId":2315,"corporation":false,"usgs":true,"family":"Rebich","given":"Richard","email":"rarebich@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":446773,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Houston, Natalie A. 0000-0002-6071-4545 nhouston@usgs.gov","orcid":"https://orcid.org/0000-0002-6071-4545","contributorId":1682,"corporation":false,"usgs":true,"family":"Houston","given":"Natalie","email":"nhouston@usgs.gov","middleInitial":"A.","affiliations":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"preferred":true,"id":446774,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mize, Scott V. 0000-0001-6751-5568 svmize@usgs.gov","orcid":"https://orcid.org/0000-0001-6751-5568","contributorId":2997,"corporation":false,"usgs":true,"family":"Mize","given":"Scott","email":"svmize@usgs.gov","middleInitial":"V.","affiliations":[{"id":369,"text":"Louisiana Water Science Center","active":true,"usgs":true}],"preferred":true,"id":446778,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pearson, Daniel 0000-0001-7808-8311 dpearson@usgs.gov","orcid":"https://orcid.org/0000-0001-7808-8311","contributorId":201255,"corporation":false,"usgs":true,"family":"Pearson","given":"Daniel","email":"dpearson@usgs.gov","affiliations":[],"preferred":true,"id":446775,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ging, Patricia B. 0000-0001-5491-8448 pbging@usgs.gov","orcid":"https://orcid.org/0000-0001-5491-8448","contributorId":1788,"corporation":false,"usgs":true,"family":"Ging","given":"Patricia","email":"pbging@usgs.gov","middleInitial":"B.","affiliations":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"preferred":true,"id":446776,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Evan, Hornig C.","contributorId":60465,"corporation":false,"usgs":true,"family":"Evan","given":"Hornig","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":446777,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70034169,"text":"70034169 - 2011 - Spatiotemporal evolution of dike opening and décollement slip at Kīlauea Volcano, Hawai'i","interactions":[],"lastModifiedDate":"2020-10-03T16:24:14.025474","indexId":"70034169","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Spatiotemporal evolution of dike opening and décollement slip at Kīlauea Volcano, Hawai'i","docAbstract":"Rapid changes in ground tilt and GPS positions on Kīlauea Volcano, Hawai'i, are interpreted as resulting from a shallow, two-segment dike intrusion into the east rift zone that began at 1217 UTC (0217 HST) on 17 June 2007 and lasted almost 3 days. As a result of the intrusion, a very small volume of basalt (about 1500 m3) erupted on 19 June. Northward tilt at a coastal tiltmeter, subsidence of south flank GPS sites, southeastward displacements at southwestern flank GPS sites, and a swarm of flank earthquakes suggest that a slow slip event occurred on the décollement beneath Kīlauea's south flank concurrent with the rift intrusion. We use 4 min GPS positions that include estimates of time-dependent tropospheric gradients and ground tilt data to study the spatial and temporal relationships between the two inferred shallow, steeply dipping dike segments extending from the surface to about 2 km depth and décollement slip at 8 km depth. We invert for the temporal evolution of distributed dike opening and décollement slip in independent inversions at each time step using a nonnegative least squares algorithm. On the basis of these inversions, the intrusion occurred in two stages that correspond spatially and temporally with concentrated rift zone seismicity. The dike opening began on the western of the two segments before jumping to the eastern segment, where the majority of opening accumulated. Dike opening preceded the start of décollement slip at an 84% confidence level; the latter is indicated by the onset of northward tilt of a coastal tiltmeter. Displacements at southwest flank GPS sites began about 18 h later and are interpreted as resulting from slow slip on the southwestern flank. Additional constraints on the evolution of the intrusion and décollement slip come from inversion of an Envisat interferogram that spans the intrusion until 0822 UTC on 18 June 2007, combined with GPS and tilt data. This inversion shows that up to 0822 UTC on 18 June, décollement slip is only required in a limited region offshore of Ka'ena Point. A similar inversion of the complete event, which includes GPS and tilt data up to 21 June and a second Envisat interferogram spanning the complete intrusion until 21 June, shows décollement slip spread westward across the south flank. This may suggest westward migration of the décollement slip as the event progressed.","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2010JB007762","usgsCitation":"Montgomery-Brown, E., Sinnett, D.K., Larson, K., Poland, M., Segall, P., and Mikijus, A., 2011, Spatiotemporal evolution of dike opening and décollement slip at Kīlauea Volcano, Hawai'i: Journal of Geophysical Research B: Solid Earth, v. 116, no. 3, B03401, 14 p., https://doi.org/10.1029/2010JB007762.","productDescription":"B03401, 14 p.","costCenters":[{"id":336,"text":"Hawaiian Volcano Observatory","active":false,"usgs":true}],"links":[{"id":475163,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2010jb007762","text":"Publisher Index Page"},{"id":244841,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawai'i","otherGeospatial":"Kilauea Volcano","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -155.798371,19.056854 ], [ -155.798371,19.550464 ], [ -155.016307,19.550464 ], [ -155.016307,19.056854 ], [ -155.798371,19.056854 ] ] ] } } ] }","volume":"116","issue":"3","noUsgsAuthors":false,"publicationDate":"2011-03-23","publicationStatus":"PW","scienceBaseUri":"505b94cee4b08c986b31ac5c","contributors":{"authors":[{"text":"Montgomery-Brown, E. K.","contributorId":81722,"corporation":false,"usgs":false,"family":"Montgomery-Brown","given":"E. K.","affiliations":[],"preferred":false,"id":444406,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sinnett, D. K.","contributorId":16680,"corporation":false,"usgs":false,"family":"Sinnett","given":"D.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":444403,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Larson, K.M.","contributorId":84949,"corporation":false,"usgs":true,"family":"Larson","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":444407,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Poland, Michael P. 0000-0001-5240-6123","orcid":"https://orcid.org/0000-0001-5240-6123","contributorId":105847,"corporation":false,"usgs":true,"family":"Poland","given":"Michael P.","affiliations":[],"preferred":false,"id":444408,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Segall, P.","contributorId":44231,"corporation":false,"usgs":false,"family":"Segall","given":"P.","affiliations":[],"preferred":false,"id":444404,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mikijus, Asta 0000-0002-2286-1886","orcid":"https://orcid.org/0000-0002-2286-1886","contributorId":80431,"corporation":false,"usgs":true,"family":"Mikijus","given":"Asta","affiliations":[{"id":336,"text":"Hawaiian Volcano Observatory","active":false,"usgs":true}],"preferred":true,"id":444405,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70176225,"text":"70176225 - 2011 - A review of the lignite resources of Arkansas","interactions":[],"lastModifiedDate":"2020-10-16T16:58:56.51936","indexId":"70176225","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"seriesTitle":{"id":5382,"text":"AAPG Studies in Geology","active":false,"publicationSubtype":{"id":24}},"chapter":"17","title":"A review of the lignite resources of Arkansas","docAbstract":"This review of the lignite resources of Arkansas is a part of the U.S. Geological Survey's (USGS) National Coal Resource Assessment (NCRA) of the Gulf Coastal Plain Coal Province, which also includes coal-bearing areas in the states of Texas, Louisiana, Alabama, Mississippi, Tennessee, and Kentucky (see Ruppert et al., 2002; Dennen, 2009; and other chapters of this publication). Lignite mining is not planned in Arkansas in the immediate future, and the lignite resources of the state were not assessed in detail as part of the NCRA. This chapter includes reviews of the geology of the lignite-bearing units, historical mining, previous investigations of lignite resources, and coal quality. Palynological data for lignite samples collected in Arkansas as part of this work are presented in Table 1.
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phackley@usgs.gov","orcid":"https://orcid.org/0000-0002-5957-2551","contributorId":592,"corporation":false,"usgs":true,"family":"Hackley","given":"Paul","email":"phackley@usgs.gov","middleInitial":"C.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true},{"id":255,"text":"Energy Resources Program","active":true,"usgs":true}],"preferred":true,"id":647907,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Willett, Jason C. 0000-0002-7598-3174 jwillett@usgs.gov","orcid":"https://orcid.org/0000-0002-7598-3174","contributorId":3516,"corporation":false,"usgs":true,"family":"Willett","given":"Jason","email":"jwillett@usgs.gov","middleInitial":"C.","affiliations":[{"id":432,"text":"National Minerals Information Center","active":true,"usgs":true}],"preferred":true,"id":647906,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Warwick, Peter D. 0000-0002-3152-7783 pwarwick@usgs.gov","orcid":"https://orcid.org/0000-0002-3152-7783","contributorId":762,"corporation":false,"usgs":true,"family":"Warwick","given":"Peter","email":"pwarwick@usgs.gov","middleInitial":"D.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":647908,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Law, S.J.","contributorId":174276,"corporation":false,"usgs":false,"family":"Law","given":"S.J.","email":"","affiliations":[{"id":100,"text":"AASG National Geologic Map Database Project","active":false,"usgs":true}],"preferred":false,"id":647909,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nichols, Douglas J.","contributorId":87184,"corporation":false,"usgs":true,"family":"Nichols","given":"Douglas","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":655879,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70192763,"text":"70192763 - 2011 - Coal resources for the Chemard Lake (Naborton No. 2) coal zone of the lower Wilcox group (Paleocene), northwestern Louisiana","interactions":[],"lastModifiedDate":"2020-10-22T16:44:00.587484","indexId":"70192763","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"seriesTitle":{"id":5382,"text":"AAPG Studies in Geology","active":false,"publicationSubtype":{"id":24}},"chapter":"6","title":"Coal resources for the Chemard Lake (Naborton No. 2) coal zone of the lower Wilcox group (Paleocene), northwestern Louisiana","docAbstract":"The lower part of the Wilcox Group of northwest Louisiana contains shallow (less than 500 ft) coal deposits that are mined for use in mine-mouth electric power-generating plants. The coal deposits, which are lignite A in apparent rank (Pierce et al., 2011), occur on the eastern part of the Sabine uplift (Figure 1). The coal zones and associated strata in the assessment area generally dip away from the axis of the Red River-Bull Bayou dome that is located in the north-central part of the Louisiana Sabine assessment area (Figure 1). This assessment area includes parts of four parishes: De Soto, Red River, Natchitoches, and Sabine (Figure 2). The assessment area was selected because of its proximity to current mining areas and the availability of stratigraphic data in the area. The assessment area is roughly 60 miles long and 15 miles wide and generally extends across the central-eastern part of the Sabine uplift in northwest Louisiana (Figure 2). More than 950 stratigraphic records from rotary and core drill holes were used to assess the coal resources of the Louisiana Sabine area. Of these, 210 are public data points and are located in or near the areas that have been permitted or proposed for surface mining (Figure 2; Appendix 1). Most of the stratigraphic data used for this assessment were provided to the U.S. Geological Survey (USGS) on a confidential basis by various coal companies for use in regional studies.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Geologic assessment of coal in the Gulf of Mexico coastal plain","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"American Association of Petroleum Geologists","usgsCitation":"Warwick, P.D., Podwysocki, S.M., and Schultz, A.C., 2011, Coal resources for the Chemard Lake (Naborton No. 2) coal zone of the lower Wilcox group (Paleocene), northwestern Louisiana, chap. 6 of Geologic assessment of coal in the Gulf of Mexico coastal plain: AAPG Studies in Geology, v. 62, p. 109-127.","productDescription":"19 p.","startPage":"109","endPage":"127","ipdsId":"IP-020033","costCenters":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true},{"id":17705,"text":"Wetland and Aquatic Research 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