This is one of a series of five seismotectonic maps of the seismically active New Madrid area in southeast Missouri and adjacent parts of Arkansas, Kentucky, and Tennessee (table 1). We cannot legibly show all the seismotectonic data on a single map, therefore each of the five maps in this series groups a different type of related information. Rhea and others (1994) summarized the background and purpose of the seismotectonic map folio.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Denver, CO","doi":"10.3133/mf2264C","usgsCitation":"Rhea, S., and Wheeler, R.L., 1994, Map showing locations of geophysical survey and modeling lines in the vicinity of New Madrid, Missouri: U.S. Geological Survey Miscellaneous Field Studies Map 2264, 1 Plate: 51.13 x 40.10, https://doi.org/10.3133/mf2264C.","productDescription":"1 Plate: 51.13 x 40.10","costCenters":[],"links":[{"id":490320,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_5884.htm","linkFileType":{"id":5,"text":"html"}},{"id":182797,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf2264c.jpg"},{"id":283694,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2264-C/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"250000","country":"United States","state":"Missouri","city":"New Madrid","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -91.0,35.0 ], [ -91.0,37.0 ], [ -89.0,37.0 ], [ -89.0,35.0 ], [ -91.0,35.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a7ee4b07f02db648525","contributors":{"authors":[{"text":"Rhea, Susan","contributorId":81110,"corporation":false,"usgs":true,"family":"Rhea","given":"Susan","email":"","affiliations":[],"preferred":false,"id":264223,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wheeler, Russell L. wheeler@usgs.gov","contributorId":858,"corporation":false,"usgs":true,"family":"Wheeler","given":"Russell","email":"wheeler@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":false,"id":264222,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":60884,"text":"mf2252 - 1994 - Shoreline and coastal wetland variability along the west shore of Green Bay, Marinette and Oconto counties, Wisconsin","interactions":[],"lastModifiedDate":"2025-06-10T13:14:25.110519","indexId":"mf2252","displayToPublicDate":"1994-01-01T07:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2252","title":"Shoreline and coastal wetland variability along the west shore of Green Bay, Marinette and Oconto counties, Wisconsin","docAbstract":"Coastal wetland ecosystems along the Great Lakes shorelines are extremely valuable natural resources. They provide numerous environmental and recreational benefits, and they serve as critical habitats for fish and wildlife populations. In general terms, wetlands can be defined as lands transitional between terrestrial and aquatic systems; they are characterized by periodic submergence or a water table at or near the surface and a predominance of hydric soils and hydrophytes. Changes in shoreline positions over time result in concomitant changes in the amount of adjacent coastal wetlands, frequently resulting in a permanent loss of these valuable resources. In the Great Lakes region, the main natural cause of shoreline changes are lake-level fluctuations that result from two interactive factors. One factor is the glacio-isostatic rebound of the lake basins, which has been occurring since the end of the late Wisconsin glaciation to the present. This crustal rebounding has slowly uplifted previous lake outlets, warped and tilted lake basins, and changed lake levels and shoreline positions. On the basis of historic lake-level gauge records, measured modern differential vertical uplift rates range from 0.26 ft/century in the southern part of the Great Lakes drainage basin to 1.74 ft/century in the northern part of the basin (Larsen, 1989). The second factor contributing to lake-level fluctuations is climate variability, which controls the amount of regional precipitation and evaporation, storm frequency, runoff, and resulting lake levels. Climate variability can occur over a wide spectrum of time scales; it can range from seasonal variations, to long-term trends of a few years or decades in duration, to trends lasting hundred of thousands of years. Climatic variations, in conjunction with glacio-isostatic rebound, have resulted in substantial temporal variability of the Great Lakes shorelines and associated wetland tracts during post-glacial times.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/mf2252","usgsCitation":"Shideler, G.L., 1994, Shoreline and coastal wetland variability along the west shore of Green Bay, Marinette and Oconto counties, Wisconsin: U.S. Geological Survey Miscellaneous Field Studies Map 2252, 1 Plate: 45.29 x 40.80 inches, https://doi.org/10.3133/mf2252.","productDescription":"1 Plate: 45.29 x 40.80 inches","costCenters":[],"links":[{"id":183493,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf2252.png"},{"id":284457,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2252/plate-1.pdf","linkFileType":{"id":5,"text":"html"}},{"id":490274,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_5874.htm","linkFileType":{"id":5,"text":"html"}}],"scale":"24000","datum":"National Geodetic Vertical Datum 1929","country":"United States","state":"Wisconsin","county":"Marinette County, Oconto County","city":"Green Bay","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -88.58,44.5 ], [ -88.58,45.0 ], [ -87.37,45.0 ], [ -87.37,44.5 ], [ -88.58,44.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd72a1e4b0b290851086f0","contributors":{"authors":[{"text":"Shideler, Gerald L.","contributorId":89137,"corporation":false,"usgs":true,"family":"Shideler","given":"Gerald","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":264553,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":60885,"text":"mf2254 - 1994 - Temporal variability of shoreline positions and coastal wetlands along lower Green Bay, Oconto and Brown counties, Wisconsin","interactions":[],"lastModifiedDate":"2014-03-25T08:05:48","indexId":"mf2254","displayToPublicDate":"1994-01-01T07:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2254","title":"Temporal variability of shoreline positions and coastal wetlands along lower Green Bay, Oconto and Brown counties, Wisconsin","docAbstract":"The positions of shorelines and the areal extent of adjacent coastal wetland tracts in the Great Lakes region have exhibited substantial temporal variability during both prehistoric and historical times. Shoreline migration has resulted in environmental problems such as flooding and the coastal erosion of lakefront property, as well as the destruction of coastal wetland resources. In the Great Lakes region, the main natural cause for changes in shoreline position and adjacent wetland area is lake-level fluctuations, which results from two interactive factors. One factor is the glacio-isostatic rebound of the lake basins that has occurred from the end of the late Wisconsin glaciation to the present. This crustal rebounding has resulted in the slow uplifting of previous lake outlets and warping of lake basins, contributing to changing lake levels and shoreline migration. Historic lake-level gauge records indicate modern differential vertical uplift rates that range from 0.26 ft/century in the southern part of the Great Lakes drainage basin to 1.74 ft/century in the northern part of the basin (Larsen, 1989). The second factor contributing to lake-level fluctuations is climate variability, which causes variations in the amount of regional precipitation and evaporation, storm frequency, runoff, and resulting lake levels. Climate variability can occur over a wide spectrum of time scales, from seasonal variations, to longer-term trends of a few years or decades in duration, to trends lasting hundreds of thousands of years. A combination of both climatic variations and glacio-isostatic rebound has resulting in substantial temporal variability of the Great Lakes shorelines and associated coastal wetland tracts during post-glacial times.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/mf2254","usgsCitation":"Shideler, G.L., 1994, Temporal variability of shoreline positions and coastal wetlands along lower Green Bay, Oconto and Brown counties, Wisconsin: U.S. Geological Survey Miscellaneous Field Studies Map 2254, Map: 40.27 x 55.30 inches, https://doi.org/10.3133/mf2254.","productDescription":"Map: 40.27 x 55.30 inches","costCenters":[],"links":[{"id":183494,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf2254.png"},{"id":284458,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2254/plate-1.pdf"}],"scale":"24000","datum":"National Geodetic Vertical Datum 1929","country":"United States","state":"Wisconsin","county":"Brown County;Oconto County","city":"Green Bay","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -88.0,44.5 ], [ -88.0,45.0 ], [ -86.5,45.0 ], [ -86.5,44.5 ], [ -88.0,44.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd768ce4b0b2908510af59","contributors":{"authors":[{"text":"Shideler, Gerald L.","contributorId":89137,"corporation":false,"usgs":true,"family":"Shideler","given":"Gerald","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":264554,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":57197,"text":"ofr94569 - 1994 - Volcanic gas emissions and their impact on ambient air character at Kilauea Volcano, Hawaii","interactions":[],"lastModifiedDate":"2025-02-21T16:54:19.305382","indexId":"ofr94569","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"94-569","title":"Volcanic gas emissions and their impact on ambient air character at Kilauea Volcano, Hawaii","docAbstract":"Currently, gas emissions from Kilauea occur from the summit caldera, along the middle East Rift Zone (ERZ), and where lava enters the ocean. We estimate that the current ERZ eruption of Kilauea releases between 400 metric tonnes of SO2 per day, during eruptive pauses, to as much as 1850 metric tonnes per day during actively erupting periods, along with lesser amounts of other chemically and radiatively active species including H2S, HCl, and HF. In order to characterize gas emissions from Kilauea in a meaningful way for assessing environmental impact we made a series of replicate grab-sample measurements of ambient air and precipitation at the summit of Kilauea, along its ERZ, and at coastal sites where lava enters the ocean. The grab-sampling data combined with SO2 emission rates, and continuous air quality and meteorological monitoring at the summit of Kilauea show that the effects of these emissions on ambient air character are a complex function of chemical reactivity, source geometry and effusivity, and local meteorology. For all the measurement sites, ambient concentrations of the emitted gases decrease rapidly, even at short distances from point sources. Prevailing tradewinds typically carry the gases and aerosols released to the southwest, where they are further distributed by the regional wind regime. Episodes of kona, or low speed variable winds sometimes disrupt this pattern, however, and allow the gases and their oxidation products to collect at the summit and eastern side of the island. Summit solfatara areas of Kilauea are distinguished by moderate to high ambient SO2, high H2S at one location, and low H2S at all others, and negligible HC1 concentrations, as measured 1 m from degassing point-sources. Summit solfatara rain water has high sulfate and low chloride ioa concentrations, and low pH. The middle ERZ degassing areas show moderate to high SO2 at 100 m away from degassing lava, and low H2S concentrations. Moderate HC1 was found in ambient air. Rain water near the middle ERZ degassing areas have high sulfate, high chloride and low pH. Coastal entry areas are characterized by high HC1 in the gas plume and significant rain-out of this HCl as indicated by low rain water pH, and high rain water chloride. Sulfate in the coastal-entry rainwater is also high. Ambient SO2 and 112S are moderate to high near the coastal entry locations. Ambient air in the lower ERZ thermal and non-thermal areas shows essentially no influence from the on-going eruption, as evidenced by the absence of SO2, H2S, HC1, and the moderate rain water pH with low sulfate concentration. When the current eruption ceases, ERZ and summit gas emissions will be greatly reduced.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr94569","usgsCitation":"Sutton, A.J., Elias, T., and Navarrete, R., 1994, Volcanic gas emissions and their impact on ambient air character at Kilauea Volcano, Hawaii: U.S. Geological Survey Open-File Report 94-569, 34 p., https://doi.org/10.3133/ofr94569.","productDescription":"34 p.","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":482342,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1994/0569/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":173985,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1994/0569/report-thumb.jpg"}],"country":"United 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","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/mf2081F","usgsCitation":"Zimbelman, D.R., 1994, Maps showing interpretation, using R-mode factor analysis, of trace-element abundances in stream-sediment samples, Delta 1 degree by 2 degrees quadrangle, Utah: U.S. Geological Survey Miscellaneous Field Studies Map 2081, 2 Plates: 41.14 x 57.32 inches and 39.63 x 41.38 inches, https://doi.org/10.3133/mf2081F.","productDescription":"2 Plates: 41.14 x 57.32 inches and 39.63 x 41.38 inches","costCenters":[],"links":[{"id":487284,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_5687.htm","linkFileType":{"id":5,"text":"html"}},{"id":364343,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2081-F/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":180279,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/mf/2081-F/report-thumb.jpg"},{"id":364344,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2081-F/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"250000","country":"United States","state":"Utah","otherGeospatial":"Delta quadrangle","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -114,39 ], [ -114,40 ], [ -112,40 ], [ -112,39 ], [ -114,39 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a19e4b07f02db605b0d","contributors":{"authors":[{"text":"Zimbelman, D. R.","contributorId":43768,"corporation":false,"usgs":true,"family":"Zimbelman","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":265363,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":59122,"text":"mf2269 - 1994 - Bathymetry of the west-central slope of the island of Hawaii","interactions":[],"lastModifiedDate":"2025-06-10T20:22:12.259026","indexId":"mf2269","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2269","title":"Bathymetry of the west-central slope of the island of Hawaii","docAbstract":"This map shows the topography of a small part of the subaerial western part of the Island of Hawaii as well as modern multibeam bathymetry of the west submarine flank, which covers a total area of about 8,500 km2 ( see index map). The map area includes part of the submerged flanks of the active Mauna Loa and Hualalai Volcanoes, which last erupted in 1984 and 1801 respectively. The steep and irregular submarine slope is shaped by several giant submarine landslides. They were first identified during surveys from the U.S. Geological Survey research vessel S.P. Lee in 1976 and 1978 (Normark and others, 1979) and later mapped in more detail during a swath-sonar survey (GLORIA) of the United States Hawaiian Exclusive Economic Zone in 1986 to 1991 (Lipman and others, 1988; Moore and others, 1989) as part of a cooperative venture of the U.S. Geological Survey and the British Institute of Oceanographic Sciences.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/mf2269","collaboration":"Prepared in cooperation with the U.S. Geological Survey--National Oceanic and Atmospheric Administration Joint Office for Mapping and Research","usgsCitation":"Chadwick, W.W., Moore, J.G., and Fox, C.G., 1994, Bathymetry of the west-central slope of the island of Hawaii: U.S. Geological Survey Miscellaneous Field Studies Map 2269, 1 Plate: 29.95 x 40.82 inches, https://doi.org/10.3133/mf2269.","productDescription":"1 Plate: 29.95 x 40.82 inches","costCenters":[],"links":[{"id":490327,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_5890.htm","linkFileType":{"id":5,"text":"html"}},{"id":183762,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf2269.jpg"},{"id":284468,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2269/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"150000","projection":"Mercator projection","country":"United States","state":"Hawai'i","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -156.8,19.2 ], [ -156.8,20.0 ], [ -155.9,20.0 ], [ -155.9,19.2 ], [ -156.8,19.2 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4ef6e4b0b290850f269b","contributors":{"authors":[{"text":"Chadwick, William W.","contributorId":77042,"corporation":false,"usgs":true,"family":"Chadwick","given":"William","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":261465,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moore, James G. 0000-0002-7543-2401 jmoore@usgs.gov","orcid":"https://orcid.org/0000-0002-7543-2401","contributorId":2892,"corporation":false,"usgs":true,"family":"Moore","given":"James","email":"jmoore@usgs.gov","middleInitial":"G.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":261464,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fox, Christopher G.","contributorId":86257,"corporation":false,"usgs":true,"family":"Fox","given":"Christopher","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":261466,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":61305,"text":"mf2081G - 1994 - Maps showing interpretation, using R-mode factor analysis, of trace-element abundances in heavy-mineral concentrate samples, Delta 1° x 2° quadrangle, Utah","interactions":[],"lastModifiedDate":"2022-09-01T19:04:20.674893","indexId":"mf2081G","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2081","chapter":"G","title":"Maps showing interpretation, using R-mode factor analysis, of trace-element abundances in heavy-mineral concentrate samples, Delta 1° x 2° quadrangle, Utah","docAbstract":"A set of heavy-mineral concentrate data for the Delta 1° x 2° quadrangle, Utah Conterminous U.S. Mineral Assessment Program (CUSMAP) project was compiled from results of analyses of samples collected during the National Uranium Resource Evaluation Program (SURE), as well as results obtained from samples collected more recently by the USGS. Data results, sampling methods, and analytical methods are provided in Abrogast and others, 1993; 1990; 1988a; 1988b). A similar report, discussing results obtained from stream-sediment samples, is presented in Zimbelman (1993a). The Delta 1° x 2° quadrangle, Utah (figure 1) contains a variety of hydrothermal mineral deposit types, including porphyry-, vein-, replacement-, and Carlin-type deposits. These deposit types have been worked for commodities including gold, silver, beryllium, uranium, lead, zinc, copper, manganese, and cadmium (Lindsey, 1977; Morris and Mogensen, 1978; Zimbelman and others, 1990; Zimbelman and others, 1988). Heavy-mineral concentrate and stream-sediment samples derived from these hydrothermally altered rocks typically contain many geochemical anomalies (for example, see Zimbelman 1993b, c, d). Element associations characterizing lithology and hydrothermal mineral deposits can be distinguished using R-mode factor analysis. This tool often is useful in reconnaissance-scale surveys where sample anomalies are often weak. and single-element distributions may not help to delineate targets. R-mode factors analysis can help identify geologic trends and areas most likely to contain the mineral deposits. R-mode factor analysis was performed on a data set of results of analyses for 19 elements in 643 samples and produced a six-factor model. These six factors represent the geochemical contributions to the data set provided by lithologic and mineralization processes, The distribution of samples that contain high scores for mineralization-related factors is widespread in the Delta quadrangle. These sample sites are though to relate to both known prospect and mineralization areas, as well as define new areas that are geochemically favorable to contain altered or mineralized rocks.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/mf2081G","usgsCitation":"Zimbelman, D.R., 1994, Maps showing interpretation, using R-mode factor analysis, of trace-element abundances in heavy-mineral concentrate samples, Delta 1° x 2° quadrangle, Utah: U.S. Geological Survey Miscellaneous Field Studies Map 2081, 2 Plates: 43.24 x 59.05 inches and 44.52 x 58.91 inches, https://doi.org/10.3133/mf2081G.","productDescription":"2 Plates: 43.24 x 59.05 inches and 44.52 x 58.91 inches","costCenters":[],"links":[{"id":406086,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_5688.htm","linkFileType":{"id":5,"text":"html"}},{"id":186909,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf2081g.jpg"},{"id":284431,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2081-G/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":284432,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/2081-G/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"250000","country":"United States","state":"Utah","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -114.0,39.0 ], [ -114.0,40.0 ], [ -112.0,40.0 ], [ -112.0,39.0 ], [ -114.0,39.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd6636e4b0b2908510096e","contributors":{"authors":[{"text":"Zimbelman, David R.","contributorId":58253,"corporation":false,"usgs":true,"family":"Zimbelman","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":265362,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70017587,"text":"70017587 - 1994 - Flow and chloride transport in the tidal Hudson River, NY","interactions":[],"lastModifiedDate":"2012-03-12T17:19:18","indexId":"70017587","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Flow and chloride transport in the tidal Hudson River, NY","docAbstract":"A one-dimensional dynamic-flow model and a one-dimensional solute-transport model were used to evaluate the effects of hypothetical public-supply water withdrawals on saltwater intrusion in a 133-mile reach of the tidal Hudson River between Green Island dam, near Troy, N.Y., and Hastings-on-Hudson, N.Y. Regression techniques were used in analyses of current and extreme historical conditions, and numerical models were used to investigate the effect of various water withdrawals. Of four withdrawal scenarios investigated, simulations of a 27-day period during which discharges at Green Island dam averaged 7,090 ft3/s indicate that increasing the present Chelsea pumping-station withdrawal rate of 100 Mgal/d (million gallons per day) to 300 Mgal/d would have the least effect on upstream saltwater movement. A 90-day simulation, during which discharges at Green Island dam averaged 25,200 ft3/s, indicates that withdrawals of 1,940 Mgal/d at Chelsea would not measurably increase chloride concentrations at Chelsea under normal tidal and meteorological conditions, but withdrawals of twice that rate (3,880 Mgal/d) could increase the chloride concentration at Chelsea to 250 mg/L.","largerWorkTitle":"Proceedings - National Conference on Hydraulic Engineering","conferenceTitle":"Proceedings of the 1994 ASCE National Conference on Hydraulic Engineering","conferenceDate":"1 August 1994 through 5 August 1994","conferenceLocation":"Buffalo, NY, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","issn":"10701559","isbn":"0784400377","usgsCitation":"Weiss, L.A., Schaffranek, R.W., and de Vries, M.P., 1994, Flow and chloride transport in the tidal Hudson River, NY, in Proceedings - National Conference on Hydraulic Engineering, no. pt 2, Buffalo, NY, USA, 1 August 1994 through 5 August 1994, p. 1300-1305.","startPage":"1300","endPage":"1305","numberOfPages":"6","costCenters":[],"links":[{"id":228334,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"pt 2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1237e4b0c8380cd54209","contributors":{"authors":[{"text":"Weiss, Lawrence A.","contributorId":102528,"corporation":false,"usgs":true,"family":"Weiss","given":"Lawrence","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":376929,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schaffranek, Raymond W.","contributorId":86314,"corporation":false,"usgs":true,"family":"Schaffranek","given":"Raymond","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":376928,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"de Vries, M. Peter","contributorId":47414,"corporation":false,"usgs":true,"family":"de Vries","given":"M.","email":"","middleInitial":"Peter","affiliations":[],"preferred":false,"id":376927,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70017568,"text":"70017568 - 1994 - Geometry of an outcrop-scale duplex in Devonian flysch, Maine","interactions":[],"lastModifiedDate":"2024-05-09T23:54:11.742158","indexId":"70017568","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2468,"text":"Journal of Structural Geology","active":true,"publicationSubtype":{"id":10}},"title":"Geometry of an outcrop-scale duplex in Devonian flysch, Maine","docAbstract":"We describe an outcrop-scale duplex consisting of 211 exposed repetitions of a single bed. The duplex marks an early Acadian (Middle Devonian) oblique thrust zone in the Lower Devonian flysch of northern Maine. Detailed mapping at a scale of 1:8 has enabled us to measure accurately parameters such as horse length and thickness, ramp angles and displacements; we compare these and derivative values with those of published descriptions of duplexes, and with theoretical models. Shortening estimates based on line balancing are consistently smaller than two methods of area balancing, suggesting that layer-parallel shortening preceded thrusting.
During the eruption of Redoubt Volcano from December 1989 through April 1990, the Alaska Volcano Observatory issued advance warnings of several tephra eruptions based on changes in seismic activity related to the occurrence of precursory swarms of long-period (LP) seismic events (dominant period of about 0.5 s). The initial eruption on December 14 occurred after 23 years of quiescence and was heralded by a 23-hour swarm of LP events that ended abruptly with the eruption. After a series of vent-clearing explosions over the next few days, dome growth began on December 21. Another swarm, with LP events similar to those of the first, began on the 26th and ended in a major tephra eruption on January 2. Eruptions continued over the next two weeks and then ceased until February 15, when a large eruption initiated a long phase of repetitive dome-building and dome-destroying episodes that continued into April. Warnings were issued before the major events on December 14 and January 2, but as the eruptive sequence continued after January 2, the energy of the swarms decreased and forecasting became more difficult. A significant but less intense swarm preceded the February 15 eruption, which was not forecast. This eruption destroyed the only seismograph on the volcanic edifice and stymied forecasting until March 4, when the first of three new stations was installed within 3 km of the active vent. From March 4 to the end of the sequence on April 21, there were eight eruptions, six of which were preceded by detectable swarms of LP events. Although weak, these swarms provided the basis for warnings issued before the eruptions on March 23 and April 6. The initial swarm on December 13 had the following features: (1) short duration (23 hours); (2) a rapidly accelerating rate of seismic energy release over the first 18 hours of the swarm, followed by a decline of activity during the 5 hours preceding the eruption; (3) a magnitude range from −0.4 to 1.6; (4) nearly identical LP signatures with a dominant period near 0.5 s; (5) dilatational first motions everywhere; and (6) a stationary source location at a depth of 1.4 km beneath the crater. This occurrence of long-period events suggests a model involving the interaction of magma with groundwater in which magmatic gases, steam and water drive a fixed conduit at a stationary point throughout the swarm. The initiation of that sequence of events is analogous to the failure of a pressure-relief valve connecting a lower, supercharged magma-dominated reservoir to a shallow hydrothermal system. A three-dimensional model of a vibrating fluid-filled crack recently developed by Chouet is found to be compatible with the seismic data and yields the following parameters for the LP source: crack length, 280–380 m; crack width, 140–190 m; crack thickness, 0.05–0.20 m; crack stiffness, 100–200; sound speed of fluid, 0.8–1.3 km/s; compressional-wave speed of rock, 5.1 km/s; density ratio of fluid to rock, ≈0.4; and ratio of bulk modulus of fluid to rigidity of rock, 0.03–0.07. The fluid-filled crack is excited intermittently by an impulsive pressure drop that varies in magnitude within the range of 0.4 to 40 bar. Such disturbance appears to be consistent with a triggering mechanism associated with choked flow conditions in the crack.
","language":"English","publisher":"Elsevier","doi":"10.1016/0377-0273(94)90030-2","issn":"03770273","usgsCitation":"Chouet, B., Page, R., Stephens, C., Lahr, J., and Power, J., 1994, Precursory swarms of long-period events at Redoubt Volcano (1989-1990), Alaska: Their origin and use as a forecasting tool: Journal of Volcanology and Geothermal Research, v. 62, no. 1-4, p. 95-135, https://doi.org/10.1016/0377-0273(94)90030-2.","productDescription":"41 p.","startPage":"95","endPage":"135","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":228517,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Cook inlet, Redoubt Volcano","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -154,\n 59\n ],\n [\n -149,\n 59\n ],\n [\n -149,\n 62\n ],\n [\n -154,\n 62\n ],\n [\n -154,\n 59\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"62","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a814de4b0c8380cd7b470","contributors":{"authors":[{"text":"Chouet, B. A.","contributorId":31813,"corporation":false,"usgs":true,"family":"Chouet","given":"B. A.","affiliations":[],"preferred":false,"id":376847,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Page, R.A.","contributorId":40197,"corporation":false,"usgs":true,"family":"Page","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":376849,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stephens, C.D.","contributorId":18752,"corporation":false,"usgs":true,"family":"Stephens","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":376845,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lahr, J.C.","contributorId":34892,"corporation":false,"usgs":true,"family":"Lahr","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":376848,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Power, J.A.","contributorId":20765,"corporation":false,"usgs":true,"family":"Power","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":376846,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70018036,"text":"70018036 - 1994 - CASERTZ aeromagnetic data reveal late Cenozoic flood basalts (?) in the West Antarctic rift system","interactions":[],"lastModifiedDate":"2024-01-21T22:49:51.179876","indexId":"70018036","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"CASERTZ aeromagnetic data reveal late Cenozoic flood basalts (?) in the West Antarctic rift system","docAbstract":"The late Cenozoic volcanic and tectonic activity of the enigmatic West Antarctic rift system, the least understood of the great active continental rifts, has been suggested to be plume driven. In 1991-1992, as part of the CASERTZ (Corridor Aerogeophysics of the Southeast Ross Transect Zone) program, an ∼25000 km aeromagnetic survey over the ice-covered Byrd subglacial basin shows magnetic \"texture\" critical to interpretations of the underlying extended volcanic terrane. The aeromagnetic data reveal numerous semicircular anomalies ∼100-1100 nT in amplitude, interpreted as having volcanic sources at the base of the ice sheet; they are concentrated along north-trending magnetic lineations interpreted as rift fabric. Models constrained by coincident radar ice soundings indicate highly magnetic sources, with a probable high remanent magnetization in the present field direction, strongly suggesting a late Cenozoic age. Magnetic anomalies over exposed late Cenozoic volcanic rocks along part of the rift shoulder and in coastal Marie Byrd Land are similar in form and amplitude. The CASERTZ aeromagnetic results, combined with >100 000 km of widely spaced aeromagnetic profiles, indicate at least 106 km3 of probable late Cenozoic volcanic rock (flood basalt?) in the West Antarctic rift beneath the ice sheet and Ross Ice Shelf. Comparison with other plumes in active rift areas (e.g., Yellowstone and East Africa) indicates that this volume estimate lies in the range of magma generation found in these other low-extension continental rifts.
The Lake Michigan outer nearshore zone (water depths ≈5 to 25 m) off Illinois Beach State Park is subjected to a spectrum of wave conditions, including those generated by major storms. Only under these major storm conditions is there a realistic potential for wave-lakebed interaction (and associated wind-driven currents) to cause a significant net modification to the outer nearshore lakebed, which, in turn, may promulgate change in the inner nearshore (surf) zone. Analysis of bathymetric and sediment grain-size data, used in conjunction with published wave hindcast data, wave propagation modeling, and previous studies in the area, indicates that this potential occurs, most likely, on a scale of years. Although such storms can generate bottom currents well in excess of what is required to mobilize the fine to very fine sands that are present, little compelling evidence was found, on the basis of gross comparisons with previous studies (1946, 1973, 1978), that there have been rapid or pronounced changes in the outer nearshore lakebed. Nonetheless, grain-size data suggest that sands are episodically transported in a net southerly direction. At least over the time period represented by this and previous studies, any modification of the outer nearshore zone lakebed would seem to be modest and gradual. If so, whereas the outer nearshore zone may be a factor in the long-term adjustment of the shoreline, any rapid change in shoreline position, or any conspicuous change in the rate of shoreline adjustment, is more likely controlled by factors other than those linked to the outer nearshore zone.
On the basis of a test experiment in 1985 (KRISP 85) an integrated seismic-refraction/teleseismic survey (KRISP 90) was undertaken to study the deep structure beneath the Kenya rift down to depths of 100–150 km. This paper summarizes the highlights of KRISP 90 as reported in this volume and discusses their broad implications as well as the structure of the Kenya rift in the general framework of other continental rifts. Major scientific goals of this phase of KRISP were to reveal the detailed crustal and upper mantle structure under the Kenya rift, to study the relationship between mantle updoming and the development of sedimentary basins and other shallow structures within the rift, to understand the role of the Kenya rift within the Afro-Arabian rift system and within a global perspective and to elucidate fundamental questions such as the mode and mechanism of continental rifting.
The KRISP results clearly demonstrate that the Kenya rift is associated with sharply defined lithospheric thinning and very low upper mantle velocities down to depths of over 150 km. In the south-central portion of the rift, the lithospheric mantle has been thinned much more than the crust. To the north, high-velocity layers detected in the upper mantle appear to require the presence of anistropy in the form of the alignment of olivine crystals. Major axial variations in structure were also discovered, which correlate very well with variations in the amount of extension, the physiographic width of the rift valley, the regional topography and the regional gravity anomalies. Similar relationships are particularly well documented in the Rio Grande rift.
To the extent that truly comparable data sets are available, the Kenya rift shares many features with other rift zones. For example, crustal structure under the Kenya, Rio Grande and Baikal rifts and the Rhine Graben is generally symmetrically centered on the rift valleys. However, the Kenya rift is distinctive, but not unique, in terms of the amount of volcanism. This volcanic activity would suggest large-scale modification of the crust by magmatism. Although there is evidence of underplating in the form of a relatively high-velocity lower crustal layer, there are no major seismic velocity anomalies in the middle and upper crust which would suggest pervasive magmatism. This apparent lack of major modification is an enigma which requires further study.
","largerWorkTitle":"","language":"English","publisher":"Elsevier","doi":"10.1016/0040-1951(94)90190-2","issn":"00401951","usgsCitation":"Keller, G.R., Prodehl, C., Mechie, J., Fuchs, K., Khan, M., Maguire, P.K., Mooney, W.D., Achauer, U., Davis, P., Meyer, R., Braile, L., Nyambok, I., and Thompson, G.A., 1994, The East African rift system in the light of KRISP 90: Tectonophysics, v. 236, no. 1-4, p. 465-483, https://doi.org/10.1016/0040-1951(94)90190-2.","productDescription":"19 p.","startPage":"465","endPage":"483","numberOfPages":"19","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":228890,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Kenya","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[40.993,-0.85829],[41.58513,-1.68325],[40.88477,-2.08255],[40.63785,-2.49979],[40.26304,-2.57309],[40.12119,-3.27768],[39.80006,-3.68116],[39.60489,-4.34653],[39.20222,-4.67677],[37.7669,-3.67712],[37.69869,-3.09699],[34.07262,-1.05982],[33.90371,-0.95],[33.89357,0.10981],[34.18,0.515],[34.6721,1.17694],[35.03599,1.90584],[34.59607,3.05374],[34.47913,3.5556],[34.005,4.24988],[34.6202,4.84712],[35.29801,5.506],[35.81745,5.33823],[35.81745,4.77697],[36.15908,4.44786],[36.85509,4.44786],[38.12091,3.59861],[38.43697,3.58851],[38.67114,3.61607],[38.89251,3.50074],[39.55938,3.42206],[39.85494,3.83879],[40.76848,4.25702],[41.1718,3.91909],[41.85508,3.91891],[40.98105,2.78452],[40.993,-0.85829]]]},\"properties\":{\"name\":\"Kenya\"}}]}","volume":"236","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba711e4b08c986b32134d","contributors":{"authors":[{"text":"Keller, Gordon R.","contributorId":90280,"corporation":false,"usgs":true,"family":"Keller","given":"Gordon","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":376751,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Prodehl, C.","contributorId":100376,"corporation":false,"usgs":true,"family":"Prodehl","given":"C.","affiliations":[],"preferred":false,"id":376754,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mechie, J.","contributorId":37902,"corporation":false,"usgs":true,"family":"Mechie","given":"J.","email":"","affiliations":[],"preferred":false,"id":376745,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fuchs, K.","contributorId":89666,"corporation":false,"usgs":true,"family":"Fuchs","given":"K.","email":"","affiliations":[],"preferred":false,"id":376750,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Khan, M.A.","contributorId":81916,"corporation":false,"usgs":true,"family":"Khan","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":376748,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Maguire, Peter K.H.","contributorId":15766,"corporation":false,"usgs":true,"family":"Maguire","given":"Peter","email":"","middleInitial":"K.H.","affiliations":[],"preferred":false,"id":376743,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":376747,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Achauer, U.","contributorId":91998,"corporation":false,"usgs":true,"family":"Achauer","given":"U.","affiliations":[],"preferred":false,"id":376753,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Davis, P.M.","contributorId":15229,"corporation":false,"usgs":true,"family":"Davis","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":376742,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Meyer, R.P.","contributorId":39146,"corporation":false,"usgs":true,"family":"Meyer","given":"R.P.","email":"","affiliations":[],"preferred":false,"id":376746,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Braile, L.W.","contributorId":85332,"corporation":false,"usgs":true,"family":"Braile","given":"L.W.","email":"","affiliations":[],"preferred":false,"id":376749,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Nyambok, I.O.","contributorId":27214,"corporation":false,"usgs":true,"family":"Nyambok","given":"I.O.","email":"","affiliations":[],"preferred":false,"id":376744,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Thompson, G. A.","contributorId":90332,"corporation":false,"usgs":true,"family":"Thompson","given":"G.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":376752,"contributorType":{"id":1,"text":"Authors"},"rank":13}]}} ,{"id":70017527,"text":"70017527 - 1994 - Statistical forecasting of repetitious dome failures during the waning eruption of Redoubt Volcano, Alaska, February-April 1990","interactions":[],"lastModifiedDate":"2012-03-12T17:19:59","indexId":"70017527","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Statistical forecasting of repetitious dome failures during the waning eruption of Redoubt Volcano, Alaska, February-April 1990","docAbstract":"The waning phase of the 1989-1990 eruption of Redoubt Volcano in the Cook Inlet region of south-central Alaska comprised a quasi-regular pattern of repetitious dome growth and destruction that lasted from February 15 to late April 1990. The dome failures produced ash plumes hazardous to airline traffic. In response to this hazard, the Alaska Volcano Observatory sought to forecast these ash-producing events using two approaches. One approach built on early successes in issuing warnings before major eruptions on December 14, 1989 and January 2, 1990. These warnings were based largely on changes in seismic activity related to the occurrence of precursory swarms of long-period seismic events. The search for precursory swarms of long-period seismicity was continued through the waning phase of the eruption and led to warnings before tephra eruptions on March 23 and April 6. The observed regularity of dome failures after February 15 suggested that a statistical forecasting method based on a constant-rate failure model might also be successful. The first statistical forecast was issued on March 16 after seven events had occurred, at an average interval of 4.5 days. At this time, the interval between dome failures abruptly lengthened. Accordingly, the forecast was unsuccessful and further forecasting was suspended until the regularity of subsequent failures could be confirmed. Statistical forecasting resumed on April 12, after four dome failure episodes separated by an average of 7.8 days. One dome failure (April 15) was successfully forecast using a 70% confidence window, and a second event (April 21) was narrowly missed before the end of the activity. The cessation of dome failures after April 21 resulted in a concluding false alarm. Although forecasting success during the eruption was limited, retrospective analysis shows that early and consistent application of the statistical method using a constant-rate failure model and a 90% confidence window could have yielded five successful forecasts and two false alarms; no events would have been missed. On closer examination, the intervals between successive dome failures are not uniform but tend to increase with time. This increase attests to the continuous, slowly decreasing supply of magma to the surface vent during the waning phase of the eruption. The domes formed in a precarious position in a breach in the summit crater rim where they were susceptible to gravitational collapse. The instability of the February 15-April 21 domes relative to the earlier domes is attributed to reaming the lip of the vent by a laterally directed explosion during the major dome-destroying eruption of February 15, a process which would leave a less secure foundation for subsequent domes. ?? 1994.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"03770273","usgsCitation":"Page, R., Lahr, J., Chouet, B., Power, J., and Stephens, C., 1994, Statistical forecasting of repetitious dome failures during the waning eruption of Redoubt Volcano, Alaska, February-April 1990: Journal of Volcanology and Geothermal Research, v. 62, no. 1-4, p. 183-196.","startPage":"183","endPage":"196","numberOfPages":"14","costCenters":[],"links":[{"id":228847,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"62","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b972de4b08c986b31b915","contributors":{"authors":[{"text":"Page, R.A.","contributorId":40197,"corporation":false,"usgs":true,"family":"Page","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":376741,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lahr, J.C.","contributorId":34892,"corporation":false,"usgs":true,"family":"Lahr","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":376740,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chouet, B. A.","contributorId":31813,"corporation":false,"usgs":true,"family":"Chouet","given":"B. A.","affiliations":[],"preferred":false,"id":376739,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Power, J.A.","contributorId":20765,"corporation":false,"usgs":true,"family":"Power","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":376738,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stephens, C.D.","contributorId":18752,"corporation":false,"usgs":true,"family":"Stephens","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":376737,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70018015,"text":"70018015 - 1994 - Bioconcentration of 5,5′,6 -trichlorobiphenyl and pentachlorophenol in the midge, Chironomus riparius, as measured by a pharmacokinetic model","interactions":[],"lastModifiedDate":"2023-12-05T17:20:28.794932","indexId":"70018015","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Bioconcentration of 5,5′,6 -trichlorobiphenyl and pentachlorophenol in the midge, Chironomus riparius, as measured by a pharmacokinetic model","title":"Bioconcentration of 5,5′,6 -trichlorobiphenyl and pentachlorophenol in the midge, Chironomus riparius, as measured by a pharmacokinetic model","docAbstract":"A two compartment pharmacokinetic model was developed which describes the uptake and elimination of 5,5′,6-trichlorobiphenyl (TCB) and pentachlorophenol (PCP) in the midge, Chironomus riparius. C. riparius were exposed to nominal TCB (2 μg L−1) and PCP (9 μg L−1) concentrations during a 16 h static uptake phase. Depuration was determined over approximately 45 h using a flowthrough system without feeding. The uptake clearance (P) was 330±61 ml g−1 midge h−1 for TCB and 55±4 ml g−1 midge h−1 for PCP, while measured bioconcentration factors (BCF) were 35,900 and 458 for TCB and PCP, respectively. Overall, the clearance-volume-based pharmacokinetic model predicted BCF values that were consistent with published values as well as with BCF values obtained from the octanol-water partition coefficient (KOW).
","language":"English","publisher":"Springer","doi":"10.1007/BF00224812","usgsCitation":"Lydy, M., Hayton, W.L., Staubus, A., and Fisher, S., 1994, Bioconcentration of 5,5′,6 -trichlorobiphenyl and pentachlorophenol in the midge, Chironomus riparius, as measured by a pharmacokinetic model: Archives of Environmental Contamination and Toxicology, v. 26, no. 2, p. 251-256, https://doi.org/10.1007/BF00224812.","productDescription":"6 p.","startPage":"251","endPage":"256","numberOfPages":"6","costCenters":[],"links":[{"id":228360,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f144e4b0c8380cd4ab3b","contributors":{"authors":[{"text":"Lydy, M.J.","contributorId":77920,"corporation":false,"usgs":true,"family":"Lydy","given":"M.J.","affiliations":[],"preferred":false,"id":378200,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hayton, W. L.","contributorId":100325,"corporation":false,"usgs":true,"family":"Hayton","given":"W.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":378202,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Staubus, A.E.","contributorId":88105,"corporation":false,"usgs":true,"family":"Staubus","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":378201,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fisher, S.W.","contributorId":14079,"corporation":false,"usgs":true,"family":"Fisher","given":"S.W.","email":"","affiliations":[],"preferred":false,"id":378199,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70018014,"text":"70018014 - 1994 - Revised Ages for Laminated Sediment and a Holocene-Marker Diatom from the Northern California Continental Slope","interactions":[],"lastModifiedDate":"2012-03-12T17:19:21","indexId":"70018014","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Revised Ages for Laminated Sediment and a Holocene-Marker Diatom from the Northern California Continental Slope","docAbstract":"Conventional and accelerator mass spectrometry 14C ages indicate that laminated sediment in three cores from the northern California continental slope near 38??N and 39??N were deposited between 42,000 and 25,000 yr B.P. This revises and refines our previous estimates that laminated sediment accumulated during the late Pleistocene to early Holocene (J. V. Gardner and E. Hemphill-Haley, 1986, Geology 14, 691-694). Preservation of laminated sediment on the upper slope in this area suggests a period of intense coastal upwelling, high primary productivity, and resultant depletion of oxygen in bottomwaters preceding the onset of global glacial conditions. The transition from Pleistocene to Holocene conditions, and the establishment of a modern climatic regime driven by the California Current, included the incursion of the subtropical diatom, Pseudoeunotia doliola. P. doliola is common in sediment younger than about 10,000 yr and thus is a reliable marker species for identifying Holocene deposits off northern California.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1006/qres.1994.1014","issn":"00335894","usgsCitation":"Hemphill-Haley, E., and Gardner, J., 1994, Revised Ages for Laminated Sediment and a Holocene-Marker Diatom from the Northern California Continental Slope: Quaternary Research, v. 41, no. 1, p. 131-135, https://doi.org/10.1006/qres.1994.1014.","startPage":"131","endPage":"135","numberOfPages":"5","costCenters":[],"links":[{"id":206107,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1006/qres.1994.1014"},{"id":228359,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505aaca4e4b0c8380cd86d8e","contributors":{"authors":[{"text":"Hemphill-Haley, E.","contributorId":69309,"corporation":false,"usgs":true,"family":"Hemphill-Haley","given":"E.","email":"","affiliations":[],"preferred":false,"id":378197,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gardner, J.V.","contributorId":76705,"corporation":false,"usgs":true,"family":"Gardner","given":"J.V.","affiliations":[],"preferred":false,"id":378198,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70017523,"text":"70017523 - 1994 - Simulation of gas phase transport of carbon-14 at Yucca Mountain, Nevada, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:19:59","indexId":"70017523","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3707,"text":"Waste Management","active":true,"publicationSubtype":{"id":10}},"title":"Simulation of gas phase transport of carbon-14 at Yucca Mountain, Nevada, USA","docAbstract":"We have simulated gas phase transport of Carbon-14 at Yucca Mountain, Nevada. Three models were established to calculate travel time of Carbon-14 from the potential repository to the mountain surface: a geochemical model for retardation factors, a coupled gas-flow and heat transfer model for temperature and gas flow fields, and a particle tracker for travel time calculation. The simulations used three parallel, east-west cross-sections that were taken from the Sandia National Laboratories Interactive Graphics Information System (IGIS). Assuming that the repository is filled with 30- year-old waste at an initial areal power density of 57 kw/acre, we found that repository temperatures remain above 60??C for more than 10,000 years. For a tuff permeability of 10-7 cm2, Carbon-14 travel times to the surface are mostly less than 1,000 years, for particles starting at any time within the first 10,000 years. If the tuff permeability is 10-8 cm2, however, Carbon- 14 travel times to the surface range from 3,000 to 12,000 years, for particle starting within the 10,000 years.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waste Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Pergamon Press Inc","publisherLocation":"Tarrytown, NY, United States","doi":"10.1016/0956-053X(94)90045-0","issn":"0956053X","usgsCitation":"Lu, N., and Ross, B., 1994, Simulation of gas phase transport of carbon-14 at Yucca Mountain, Nevada, USA: Waste Management, v. 14, no. 5, p. 409-420, https://doi.org/10.1016/0956-053X(94)90045-0.","startPage":"409","endPage":"420","numberOfPages":"12","costCenters":[],"links":[{"id":206151,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0956-053X(94)90045-0"},{"id":228757,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9029e4b08c986b31935f","contributors":{"authors":[{"text":"Lu, N.","contributorId":96025,"corporation":false,"usgs":true,"family":"Lu","given":"N.","email":"","affiliations":[],"preferred":false,"id":376719,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ross, B.","contributorId":32779,"corporation":false,"usgs":true,"family":"Ross","given":"B.","email":"","affiliations":[],"preferred":false,"id":376718,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70017592,"text":"70017592 - 1994 - Diurnal-period currents trapped above Fieberling Guyot: observed characteristics and model comparisons","interactions":[],"lastModifiedDate":"2013-03-13T20:20:53","indexId":"70017592","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1370,"text":"Deep-Sea Research Part I: Oceanographic Research Papers","active":true,"publicationSubtype":{"id":10}},"title":"Diurnal-period currents trapped above Fieberling Guyot: observed characteristics and model comparisons","docAbstract":"Current measurements at depths of 19, 115, 264 and 464 m above the summit of Fieberling Guyot (32??28???N, 127??47???W) for 13 months in 1989 show that the diurnal tides are strongly amplified. The measured variances for K1, P1 and O1 at the 115 m depth were 810, 140 and 80 times larger than the variances of the respective estimated barotropic tides. The diurnal currents closer to the summit were also strongly amplified, through the variance ratios were 40-50% of the ratios observed at 115 m. The diurnal band currents were only amplified at the precise tidal frequencies; the bandwidth of the response was less than 0.0002 cph. The discrete character of the response suggests that only currents with large spatial scales will be amplified. The characteristics of the amplified diurnal currents are compared to those predicted by a model for Fieberling Guyot of seamount-trapped waves driven by the barotropic tide. The amplitudes of the responses at this one site on the seamount compare favourably to the predicted. ?? 1994.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Deep-Sea Research Part I: Oceanographic Research Papers","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/0967-0637(94)90047-7","issn":"09670637","usgsCitation":"Noble, M., Brink, K., and Eriksen, C., 1994, Diurnal-period currents trapped above Fieberling Guyot: observed characteristics and model comparisons: Deep-Sea Research Part I: Oceanographic Research Papers, v. 41, no. 4, p. 643-658, https://doi.org/10.1016/0967-0637(94)90047-7.","startPage":"643","endPage":"658","numberOfPages":"16","costCenters":[],"links":[{"id":269285,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0967-0637(94)90047-7"},{"id":228383,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0346e4b0c8380cd503d5","contributors":{"authors":[{"text":"Noble, M.A.","contributorId":93513,"corporation":false,"usgs":true,"family":"Noble","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":376942,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brink, K.H.","contributorId":86230,"corporation":false,"usgs":true,"family":"Brink","given":"K.H.","email":"","affiliations":[],"preferred":false,"id":376940,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Eriksen, C.C.","contributorId":90176,"corporation":false,"usgs":true,"family":"Eriksen","given":"C.C.","email":"","affiliations":[],"preferred":false,"id":376941,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70017521,"text":"70017521 - 1994 - Using PETRIMES to estimate mercury deposits in California","interactions":[],"lastModifiedDate":"2012-03-12T17:19:58","indexId":"70017521","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2879,"text":"Nonrenewable Resources","active":true,"publicationSubtype":{"id":10}},"title":"Using PETRIMES to estimate mercury deposits in California","docAbstract":"In this article, we examine the use of an unconventional procedure, PETRIMES, to estimate mineral resources of mercury deposits in California. The study, which is based on the nonparametric discovery process model and Q-Q plots, suggests that a lognormal distribution is appropriate for the mercury deposits in California. The results of the assessment are summarized as follows: (1) the total number of mercury deposits in the population is approximately 165; (2) the median value of the largest undiscovered deposit size is 487 flasks; (3) the mean of the remaining mercury potential is 2,500 flasks; and (4) the population resource ranges from 1,040,000 to 4,300,000 flasks (at a 0.9 probability level). ?? 1994 Oxford University Press.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nonrenewable Resources","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers","doi":"10.1007/BF02259044","issn":"09611444","usgsCitation":"Lee, P., and Singer, D., 1994, Using PETRIMES to estimate mercury deposits in California: Nonrenewable Resources, v. 3, no. 3, p. 190-199, https://doi.org/10.1007/BF02259044.","startPage":"190","endPage":"199","numberOfPages":"10","costCenters":[],"links":[{"id":206150,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02259044"},{"id":228755,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc01ae4b08c986b329f24","contributors":{"authors":[{"text":"Lee, P.J.","contributorId":7859,"corporation":false,"usgs":true,"family":"Lee","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":376715,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Singer, D.A.","contributorId":69128,"corporation":false,"usgs":true,"family":"Singer","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":376716,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70017518,"text":"70017518 - 1994 - Isotopic Approach to Soil Carbonate Dynamics and Implications for Paleoclimatic Interpretations","interactions":[],"lastModifiedDate":"2012-03-12T17:19:59","indexId":"70017518","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Isotopic Approach to Soil Carbonate Dynamics and Implications for Paleoclimatic Interpretations","docAbstract":"The radiocarbon content and stable isotope composition of soil carbonate are best described by a dynamic system in which isotopic reequilibration occurs as a result of recurrent dissolution and reprecipitation. Depth of water penetration into the soil profile, as well as soil age, determines the degree of carbonate isotope reequilibration. We measured ??13C, ??18O and radiocarbon content of gravel rinds and fine (<2 mm) carbonate in soils of 3 .different ages (1000, 3800, and 6300 14 C yr B.P.) to assess the degree to which they record and preserve a climatic signal. In soils developing in deposits independently dated at 3800 and 6300 radiocarbon yr B.P., carbonate radiocarbon content above 40 cm depth suggests continual dissolution and reprecipitation, presumably due to frequent wetting events. Between 40 and 90 cm depth, fine carbonate is dissolved and precipitated as rinds that are not redissolved subsequently. Below 90 cm depth in these soils, radiocarbon content indicates that inherited, fine carbonate undergoes little dissolution and reprecipitation. In the 3800- and 6300-yr-old soils, ??13C in rind and fine carbonate follows a decreasing trend with depth, apparently in equilibrium with modern soil gas, as predicted by a diffusive model for soil CO2. ??18O also decreases with depth due to greater evaporative enrichment above 50 cm depth. In contrast, carbonate isotopes in a 1000-yr-old deposit do not reflect modern conditions even in surficial horizons; this soil has not undergone significant pedogenesis. There appears to be a lag of at least 1000 but less than 3800 yr before carbonate inherited with parent material is modified by ambient climatic conditions. Although small amounts of carbonate are inherited with the parent material, the rate of pedogenic carbonate accumulation indicates that Ca is derived primarily from eolian and rainfall sources. A model describing carbonate input and radiocarbon decay suggests that fine carbonate below 90 cm is mostly detrital (inherited) and that carbonate rinds have been forming pedogenically at a constant rate since alluvial fans were deposited.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1006/qres.1994.1054","issn":"00335894","usgsCitation":"Pendall, E., Harden, J., Trumbore, S., and Chadwick, O., 1994, Isotopic Approach to Soil Carbonate Dynamics and Implications for Paleoclimatic Interpretations: Quaternary Research, v. 42, no. 1, p. 60-71, https://doi.org/10.1006/qres.1994.1054.","startPage":"60","endPage":"71","numberOfPages":"12","costCenters":[],"links":[{"id":480253,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://escholarship.org/uc/item/8b42z95n","text":"External Repository"},{"id":206144,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1006/qres.1994.1054"},{"id":228707,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"42","issue":"1","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a3f8fe4b0c8380cd645f8","contributors":{"authors":[{"text":"Pendall, E. G.","contributorId":60669,"corporation":false,"usgs":true,"family":"Pendall","given":"E. G.","affiliations":[],"preferred":false,"id":376712,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harden, J.W. 0000-0002-6570-8259","orcid":"https://orcid.org/0000-0002-6570-8259","contributorId":38585,"corporation":false,"usgs":true,"family":"Harden","given":"J.W.","affiliations":[],"preferred":false,"id":376710,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Trumbore, S.E.","contributorId":57879,"corporation":false,"usgs":true,"family":"Trumbore","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":376711,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chadwick, O.A.","contributorId":15219,"corporation":false,"usgs":true,"family":"Chadwick","given":"O.A.","email":"","affiliations":[],"preferred":false,"id":376709,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70017514,"text":"70017514 - 1994 - Use of long-term tritium records from the Colorado River to determine timescales for hydrologic processes associated with irrigation in the Imperial Valley, California","interactions":[],"lastModifiedDate":"2019-03-01T10:07:14","indexId":"70017514","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Use of long-term tritium records from the Colorado River to determine timescales for hydrologic processes associated with irrigation in the Imperial Valley, California","docAbstract":"Tritium records were used to study hydrologic processes associated with irrigation and drainage in the Imperial Valley, a 2000-km2 agricultural area in the southeastern California desert. Tritium was analyzed in surface water, ground water, soil-pore water and drain water, and the results were compared to the historical record of tritium in the Colorado River. The Colorado River record was reconstructed using a simple reservoir model and precipitation data in the Colorado River Basin for the period prior to 1965, and from continuous measurements in the river for 1965–1988. This historical record is especially useful in the arid Imperial Valley because recent agricultural development has been entirely dependent on irrigation water diverted from the Colorado River and local recharge is negligible.
Results indicate that it takes about 5 a for irrigation drainage to move through the soil to a depth of 2–3 m. Drainwaters have a wide range in tritium concentrations because of varying degrees of influence from ground-water intrusion, and from rapid percolation of irrigation through preferred pathways. The net result is that drainwater from about 40 fields had a range in tritium concentration similar to that of the Colorado River over the last 9 a (1980–1988), a period during which tritium concentration was declining about 15% annually in the river.
","language":"English","publisher":"Elsevier","doi":"10.1016/0883-2927(94)90061-2","issn":"08832927","usgsCitation":"Michel, R.L., and Schoeder, R., 1994, Use of long-term tritium records from the Colorado River to determine timescales for hydrologic processes associated with irrigation in the Imperial Valley, California: Applied Geochemistry, v. 9, no. 4, p. 387-401, https://doi.org/10.1016/0883-2927(94)90061-2.","productDescription":"15 p.","startPage":"387","endPage":"401","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":228562,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Imperial Valley","volume":"9","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbf39e4b08c986b329a27","contributors":{"authors":[{"text":"Michel, Robert L. rlmichel@usgs.gov","contributorId":823,"corporation":false,"usgs":true,"family":"Michel","given":"Robert","email":"rlmichel@usgs.gov","middleInitial":"L.","affiliations":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true}],"preferred":true,"id":376700,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schoeder, R.A.","contributorId":103429,"corporation":false,"usgs":true,"family":"Schoeder","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":376701,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70017138,"text":"70017138 - 1994 - Indicators of sewage contamination in sediments beneath a deep-ocean dump site off New York","interactions":[],"lastModifiedDate":"2017-11-05T10:23:50","indexId":"70017138","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1994","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2664,"text":"Marine Environmental Research","active":true,"publicationSubtype":{"id":10}},"title":"Indicators of sewage contamination in sediments beneath a deep-ocean dump site off New York","docAbstract":"The world's largest discharge of municipal sewage sludge to surface waters of the deep sea has caused measurable changes in the concentration of sludge indicators in sea-floor sediments, in a spatial pattern which agrees with the predictions of a recent sludge deposition model. Silver, linear alkylbenzenes, coprostanol, and spores of the bacterium Clostridium perfringens, in bottom sediments and in near-bottom suspended sediment, provide evidence for rapid settling of a portion of discharged solids, accumulation on the sea floor, and biological mixing beneath the water sediment interface. Biological effects include an increase in 1989 of two species of benthic polychaete worm not abundant at the dump site before sludge dumping began in 1986. These changes in benthic ecology are attributed to the increased deposition of utilizable food in the form of sludge-derived organic matter.","language":"English","publisher":"Elsevier","doi":"10.1016/0141-1136(94)90045-0","issn":"01411136","usgsCitation":"Bothner, M., Takada, H., Knight, I., Hill, R.T., Butman, B., Farrington, J., Colwell, R., and Grassle, J.F., 1994, Indicators of sewage contamination in sediments beneath a deep-ocean dump site off New York: Marine Environmental Research, v. 38, no. 1, p. 43-59, https://doi.org/10.1016/0141-1136(94)90045-0.","productDescription":"17 p.","startPage":"43","endPage":"59","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":224631,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New Jersey, New York","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -75,\n 38\n ],\n [\n -70,\n 38\n ],\n [\n -70,\n 41\n ],\n [\n -75,\n 41\n ],\n [\n -75,\n 38\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"38","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d85e4b08c986b31846c","contributors":{"authors":[{"text":"Bothner, Michael H. mbothner@usgs.gov","contributorId":139855,"corporation":false,"usgs":true,"family":"Bothner","given":"Michael H.","email":"mbothner@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":375533,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Takada, H.","contributorId":47094,"corporation":false,"usgs":true,"family":"Takada","given":"H.","email":"","affiliations":[],"preferred":false,"id":375532,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Knight, I.T.","contributorId":59960,"corporation":false,"usgs":true,"family":"Knight","given":"I.T.","email":"","affiliations":[],"preferred":false,"id":375534,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hill, R. T.","contributorId":69990,"corporation":false,"usgs":true,"family":"Hill","given":"R.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":375535,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Butman, B.","contributorId":85580,"corporation":false,"usgs":true,"family":"Butman","given":"B.","email":"","affiliations":[],"preferred":false,"id":375536,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Farrington, J.W.","contributorId":89160,"corporation":false,"usgs":true,"family":"Farrington","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":375537,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Colwell, R.R.","contributorId":44671,"corporation":false,"usgs":true,"family":"Colwell","given":"R.R.","email":"","affiliations":[],"preferred":false,"id":375531,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Grassle, J. F.","contributorId":8621,"corporation":false,"usgs":false,"family":"Grassle","given":"J.","email":"","middleInitial":"F.","affiliations":[{"id":6706,"text":"Woods Hole Oceanographic Institution,","active":true,"usgs":false}],"preferred":false,"id":375530,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ]}