There were no major earthquakes (7.0-7.9) during this reporting period but earthquake related deaths wre reported from Japan Turkey. Algeria the USSR, and Yugoslavia had damaging earthquakes.
\nIn the United States, Wyoming experienced a couple of moderate earthquakes, and off the coast of northern California, a strong earthquake shook much of the northern coast of California and parts of the Oregon coast.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Person, W., 1985, Earthquakes, September-October 1984: Earthquake Information Bulletin (USGS), v. 17, no. 2, p. 73-78.","productDescription":"6 p.","startPage":"73","endPage":"78","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318589,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56dabfcce4b015c306f84c5d","contributors":{"authors":[{"text":"Person, W. J.","contributorId":91472,"corporation":false,"usgs":true,"family":"Person","given":"W. J.","affiliations":[],"preferred":false,"id":621972,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013253,"text":"70013253 - 1985 - Quaternary sedimentation in Shelikof Strait, Alaska","interactions":[],"lastModifiedDate":"2024-10-18T15:54:19.796466","indexId":"70013253","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Quaternary sedimentation in Shelikof Strait, Alaska","docAbstract":"Shelikof Strait, a nearly parallel-sided marine channel between the Kodiak Island group and the Alaska Peninsula, has experienced a succession of distinct sedimentary environments during Quaternary time. Pleistocene glaciers carved a deep basin into bedrock in the southwest part of the strait and a shallower platform surface with incised channels in the northeast. The basin and channels were filled with glacial and glacialmarine sediment before and during the time that ice retreated and oceanic conditions returned. Restricted marine conditions prevailed in early Holocene time and sediment prograded transversely into the strait from the adjacent landmasses, with some localized dispersal to the deep, central strait. Onset of modern open-marine conditions commenced when regional currents breached the sill across Kennedy and Stevenson Entrances to combine with sediment-laden outflow from Cook Inlet and deposit a blanket of well-stratified sediment throughout the strait.
","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(85)90118-5","usgsCitation":"Hampton, M.A., 1985, Quaternary sedimentation in Shelikof Strait, Alaska: Marine Geology, v. 62, no. 3-4, p. 213-253, https://doi.org/10.1016/0025-3227(85)90118-5.","productDescription":"41 p.","startPage":"213","endPage":"253","costCenters":[],"links":[{"id":220472,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Shelikof Strait","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -156.31521315009502,\n 57.41329018484549\n ],\n [\n -152.28348485588108,\n 57.41329018484549\n ],\n [\n -152.28348485588108,\n 58.81251726586029\n ],\n [\n -156.31521315009502,\n 58.81251726586029\n ],\n [\n -156.31521315009502,\n 57.41329018484549\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"62","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a92d7e4b0c8380cd80aa3","contributors":{"authors":[{"text":"Hampton, Monty A. mhampton@usgs.gov","contributorId":4393,"corporation":false,"usgs":true,"family":"Hampton","given":"Monty","email":"mhampton@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":365643,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70168845,"text":"70168845 - 1985 - Earthquakes, July-August 1984","interactions":[],"lastModifiedDate":"2016-03-24T15:41:57","indexId":"70168845","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1435,"text":"Earthquake Information Bulletin (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Earthquakes, July-August 1984","docAbstract":"There were no major earthquakes (7.0-7.9) and no earthquake related deaths reported during this period but injuries and damage were experienced in Japan from earthquakes.
\nThere were no earthquake casualties reported in the United States but some minor damage was reported.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Person, W., 1985, Earthquakes, July-August 1984: Earthquake Information Bulletin (USGS), v. 17, no. 1, p. 34-37.","productDescription":"4 p.","startPage":"34","endPage":"37","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318594,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56dabfc7e4b015c306f84c4f","contributors":{"authors":[{"text":"Person, W. J.","contributorId":91472,"corporation":false,"usgs":true,"family":"Person","given":"W. J.","affiliations":[],"preferred":false,"id":621977,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":2000106,"text":"2000106 - 1985 - Classification of wetlands and deepwater habitats of the United States","interactions":[],"lastModifiedDate":"2017-09-14T10:29:12","indexId":"2000106","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"seriesTitle":{"id":20,"text":"FWS/OBS","active":false,"publicationSubtype":{"id":1}},"seriesNumber":"79/31","title":"Classification of wetlands and deepwater habitats of the United States","docAbstract":"This classification, to be used in a new inventory of wetlands and deepwater habitats of the United States, is intended to describe ecological taxa, arrange them in a system useful to resource managers, furnish units for mapping, and provide uniformity of concepts and terms. Wetlands are defined by plants (hydrophytes), soils (hydric soils), and frequency of flooding. Ecologically related areas of deep water, traditionally not considered wetlands, are included in the classification as deepwater habitats.Systems form the highest level of the classification hierarchy; five are defined-Marine, Estuarine, Riverine, Lacustrine, and Palustrine. Marine and Estuarine Systems each have two Subsystems, Subtidal and Intertidal; the Riverine System has four Subsystems, Tidal, Lower Perennial, Upper Perennial, and Intermittent; the Lacustrine has two, Littoral and Limnetic; and the Palustrine has no Subsystems.Within the Subsystems, Classes are based on substrate material and flooding regime, or on vegetative life form. The same Classes may appear under one or more of the Systems or Subsystems. Six Classes are based on substrate and flooding regime: (1) Rock Bottom with a substrate of bedrock, boulders, or stones; (2) Unconsolidated Bottom with a substrate of cobbles, gravel, sand, mud, or organic material; (3) Rocky Shore with the same substrates as Rock Bottom; (4) Unconsolidated Shore with the same substrates as Unconsolidated Bottom; (5) Streambed with any of the substrates; and (6) Reef with a substrate composed of the living and dead remains of invertebrates (corals, mollusks, or worms). The bottom Classes, (1) and (2) above, are flooded all or most of the time and the shore Classes, (3) and (4), are exposed most of the time. The Class Streambed is restricted to channels of intermittent streams and tidal channels that are dewatered at low tide. The life form of the dominant vegetation defines the five Classes based on vegetative form: (1) Aquatic Bed, dominated by plants that grow principally on or below the surface of the water; (2) Moss-Lichen Wetland, dominated by mosses or lichens; (3) Emergent Wetland, dominated by emergent herbaceous angiosperms; (4) Scrub-Shrub Wetland, dominated by shrubs or small trees; and (5) Forested Wetland, dominated by large trees.The Dominance Type, which is named for the dominant plant or animal forms, is the lowest level of the classification hierarchy. Only examples are provided for this level; Dominance Types must be developed by individual users of the classification.Modifying terms applied to the Classes or Subclasses are essential for use of the system. In tidal areas, the type and duration of flooding are described by four Water Regime Modifiers: subtidal, irregularly exposed, regularly flooded, and irregularly flooded. In nontidal areas, eight Regimes are used: permanently flooded, intermittently exposed, semipermanently flooded, seasonally flooded, saturated, temporarily flooded, intermittently flooded, and artificially flooded. A hierarchical system of Water Chemistry Modifiers, adapted from the Venice System, is used to describe the salinity of the water. Fresh waters are further divided on the basis of pH. Use of a hierarchical system of soil modifiers taken directly from U.S. soil taxonomy is also required. Special modifiers are used where appropriate: excavated, impounded, diked, partly drained, farmed, and artificial.Regional differences important to wetland ecology are described through a regionalization that combines a system developed for inland areas by R. G. Bailey in 1976 with our Marine and Estuarine provinces.The structure of the classification allows it to be used at any of several hierarchical levels. Special data required for detailed application of the system are frequently unavailable, and thus data gathering may be prerequisite to classification. Development of rules by the user will be required for specific map scales. Dominance Types and relationships of plant and anima","language":"English","publisher":"U.S. Fish and Wildlife Service","publisherLocation":"Washington, DC","usgsCitation":"Cowardin, L., Carter, V., Golet, F., and LaRoe, E., 1985, Classification of wetlands and deepwater habitats of the United States: FWS/OBS 79/31, 132 p.","productDescription":"132 p.","startPage":"0","endPage":"131","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":198357,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49d6e4b07f02db5de2ed","contributors":{"authors":[{"text":"Cowardin, L.M.","contributorId":106435,"corporation":false,"usgs":true,"family":"Cowardin","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":325098,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carter, V.","contributorId":61115,"corporation":false,"usgs":true,"family":"Carter","given":"V.","email":"","affiliations":[],"preferred":false,"id":325096,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Golet, F.C.","contributorId":32124,"corporation":false,"usgs":true,"family":"Golet","given":"F.C.","email":"","affiliations":[],"preferred":false,"id":325095,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"LaRoe, E.T.","contributorId":103766,"corporation":false,"usgs":true,"family":"LaRoe","given":"E.T.","email":"","affiliations":[],"preferred":false,"id":325097,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70012362,"text":"70012362 - 1985 - Active tectonic and magmatic processes beneath Long Valley Caldera, eastern California: An overview","interactions":[],"lastModifiedDate":"2024-06-27T15:46:20.934599","indexId":"70012362","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Active tectonic and magmatic processes beneath Long Valley Caldera, eastern California: An overview","docAbstract":"Geological, chronological, and structural studies of the Long Valley-Mono/Inyo Craters area document a long history of related volcanic eruptions and earthquakes controlled by regional extensional tectonics of the Basin and Range province. This activity has persisted for hundreds of thousands of years and is likely to continue. The Long Valley magma chamber had a volume approaching 3000 km3 prior to its climatic caldera-forming eruption 0.7 m.y. ago but has been reduced to less than a third of this volume by cooling, eruption, and crystallization. Seismic evidence indicates that the main mass of the present Long Valley magma chamber is about 10 km in diameter and that its roof is 8–10 km deep with smaller cupolas as shallow as 4–5 km. Although a chamber of this size is probably capable of producing an eruption approaching 30 km3 of lava, the record over the past 0.5 m.y. suggests that eruptions of 1 km3 or less are far more likely. Models proposed for the current ground uplift and seismicity within the caldera require inflation of 0.1–0.2 km3 by additional magma since mid-1979, and some models suggest that inflation was accompanied by injection of a thin dike or dikes (probably of silicic magma) into the ring fracture zone beneath the south moat. Several of the M 5.8–6.2 earthquakes that occurred in the region beginning in 1978 had non-double-couple focal mechanisms. Whether these unusual mechanisms indicate injection of mafic (low-viscosity) magma at midcrustal depths in the Sierra Nevada block south of the caldera remains debatable. Studies of calderas of various ages throughout the world indicate that episodes of unrest are relatively common and do not invariably culminate in eruptions. Although current unrest is concentrated in the south moat of Long Valley caldera, the Inyo/Mono Craters probably hold a greater potential for producing an eruption in the foreseeable future. The Inyo/Mono Craters have erupted at 500-year intervals over the past 2000–3000 years, whereas the Long Valley magma chamber has erupted at about 200,000-year intervals over the past 700,000 years. In either case, a major earthquake near the caldera could strongly influence the course of volcanic activity.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB090iB13p11111","issn":"01480227","usgsCitation":"Hill, D., Bailey, R., and Ryall, A., 1985, Active tectonic and magmatic processes beneath Long Valley Caldera, eastern California: An overview: Journal of Geophysical Research Solid Earth, v. 90, no. B13, p. 11111-11120, https://doi.org/10.1029/JB090iB13p11111.","productDescription":"10 p.","startPage":"11111","endPage":"11120","costCenters":[],"links":[{"id":222074,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"90","issue":"B13","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059e6ade4b0c8380cd475a2","contributors":{"authors":[{"text":"Hill, D.P.","contributorId":27432,"corporation":false,"usgs":true,"family":"Hill","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":363373,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bailey, R. A.","contributorId":87531,"corporation":false,"usgs":true,"family":"Bailey","given":"R. A.","affiliations":[],"preferred":false,"id":363374,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ryall, A.S.","contributorId":7695,"corporation":false,"usgs":true,"family":"Ryall","given":"A.S.","email":"","affiliations":[],"preferred":false,"id":363372,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70170523,"text":"70170523 - 1985 - Reports from the U.S. Geological Survey’s Cascades Volcano Observatory at Vancouver, Washington","interactions":[],"lastModifiedDate":"2016-04-24T11:56:15","indexId":"70170523","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1435,"text":"Earthquake Information Bulletin (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Reports from the U.S. Geological Survey’s Cascades Volcano Observatory at Vancouver, Washington","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Brantley, S., Power, J., and Topinka, L., 1985, Reports from the U.S. Geological Survey’s Cascades Volcano Observatory at Vancouver, Washington: Earthquake Information Bulletin (USGS), v. 17, no. 1, p. 20-32.","productDescription":"13 p.","startPage":"20","endPage":"32","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":320469,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"571dee2ce4b071321fe5641b","contributors":{"authors":[{"text":"Brantley, S.","contributorId":28451,"corporation":false,"usgs":true,"family":"Brantley","given":"S.","affiliations":[],"preferred":false,"id":627519,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Power, J.","contributorId":48699,"corporation":false,"usgs":true,"family":"Power","given":"J.","email":"","affiliations":[],"preferred":false,"id":627520,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Topinka, L.","contributorId":168862,"corporation":false,"usgs":false,"family":"Topinka","given":"L.","affiliations":[],"preferred":false,"id":627521,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":47688,"text":"wri854000 - 1985 - Map showing the potentiometric surface of the Magothy aquifer in southern Maryland, September 1983","interactions":[],"lastModifiedDate":"2023-04-17T20:13:58.796084","indexId":"wri854000","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"85-4000","title":"Map showing the potentiometric surface of the Magothy aquifer in southern Maryland, September 1983","docAbstract":"No abstract available.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wri854000","usgsCitation":"Mack, F., Wheeler, J.C., and Curtin, S.E., 1985, Map showing the potentiometric surface of the Magothy aquifer in southern Maryland, September 1983: U.S. Geological Survey Water-Resources Investigations Report 85-4000, 1 p., https://doi.org/10.3133/wri854000.","productDescription":"1 p.","costCenters":[{"id":374,"text":"Maryland Water Science Center","active":true,"usgs":true}],"links":[{"id":415883,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_36199.htm","linkFileType":{"id":5,"text":"html"}},{"id":84597,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1985/4000/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":169951,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1985/4000/report-thumb.jpg"}],"country":"United States","state":"Maryland","otherGeospatial":"Magothy aquifer","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -77,\n 39.083\n ],\n [\n -77,\n 38.5\n ],\n [\n -76.383,\n 38.5\n ],\n [\n -76.383,\n 39.083\n ],\n [\n -77,\n 39.083\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b12e4b07f02db6a252f","contributors":{"authors":[{"text":"Mack, Frederick K.","contributorId":95858,"corporation":false,"usgs":true,"family":"Mack","given":"Frederick K.","affiliations":[],"preferred":false,"id":236012,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wheeler, Judith C.","contributorId":13620,"corporation":false,"usgs":true,"family":"Wheeler","given":"Judith","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":236011,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Curtin, Stephen E. securtin@usgs.gov","contributorId":3703,"corporation":false,"usgs":true,"family":"Curtin","given":"Stephen","email":"securtin@usgs.gov","middleInitial":"E.","affiliations":[{"id":374,"text":"Maryland Water Science Center","active":true,"usgs":true}],"preferred":true,"id":236010,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":29912,"text":"wri854087 - 1985 - Ground-water flow in the Prairie du Chien-Jordan aquifer related to contamination by coal-tar derivatives, St. Louis Park, Minnesota","interactions":[],"lastModifiedDate":"2023-03-13T19:17:59.193897","indexId":"wri854087","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"85-4087","title":"Ground-water flow in the Prairie du Chien-Jordan aquifer related to contamination by coal-tar derivatives, St. Louis Park, Minnesota","docAbstract":"A three-dimensional, ground-water-flow model of the Prairie du Chien-Jordan aquifer and associated hydrogeologic units was developed to evaluate the movement of coal-tar derivatives from a coal-tar distillation and wood-preserving plant in St. Louis Park, Minnesota. A finite-difference grid was superimposed on the modeled area, which includes most of eastern Hennepin County. The individual cells are 400-foot squares in the center of the grid (St. Louis Park area); the cells increase in dimension toward the outside limits of the grid. Five geologic units are represented by four layers in the model. These units include the Jordan Sandstone, the Prairie du Chien Group (dolomite and sandy dolomite), the basal confining unit of the St. Peter Sandstone (silty and sandy shale), the St. Peter Sandstone, and glacial deposits in bedrock valleys.
The model was calibrated for steady-state conditions for a period before significant ground-water development (1885-1930) and for a period of significant pumping stress (winter conditions, 1970 fs). A transient calibration was accomplished by simulation of a period during which seasonal changes in potentiometric head in the Prairie du Chien-Jordan aquifer were significant (1977-80). Sensitivity testing indicated that leakage to the upper model layer and the vertical hydraulic conductivity of the basal confining unit of the St. Peter Sandstone were the model hydrologic properties which, when changed, resulted in the greatest changes in model-calculated water levels. The calibrated model generally calculates water levels that are within 10 feet of measured values.
Model simulations indicate that the potentiometric surface of the Prairie du Chien-Jordan aquifer would be raised by as much as 3 feet in the area of the plant site by water introduced into the aquifer through wells open to more than one aquifer system. The cones of impression created at these wells could have a significant impact on the transport of contaminants in the Prairie du Chien-Jordan.
The presence of coal-tar derivatives in the aquifer has been difficult to explain in wells located upgradient from the plant site to the north, west, and southwest. Simulations suggest that, during periods of heavy withdrawal from certain of these wells (SLP10, SLP15, and SLP5), local hydraulic gradients may have been altered, resulting in the potential for the movement of contaminants from the area of the plant site to the wells. Cones of impression at multiaquifer wells near the plant site contributed to the alteration of local gradients.
Simulation of a proposed gradient-control plan, in which lateral homogeneity and isotropy of individual hydro geologic units was assumed, indicates that the actions would be effective in limiting expansion of the contaminated volume in the Prairie du Chien-Jordan aquifer. The plan includes the control of withdrawal from five wells. The simulations also show, however, that modelcalculated potentiometric surfaces are sensitive to changes in withdrawal rates at wells not intended to be under the control of the plan. Management of discharge from these wells also will be important to overall effectiveness of the remedial-action plan.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"St. Paul, MN","doi":"10.3133/wri854087","usgsCitation":"Stark, J., and Hult, M.F., 1985, Ground-water flow in the Prairie du Chien-Jordan aquifer related to contamination by coal-tar derivatives, St. Louis Park, Minnesota: U.S. Geological Survey Water-Resources Investigations Report 85-4087, v, 57 p., https://doi.org/10.3133/wri854087.","productDescription":"v, 57 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":414036,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_36260.htm","linkFileType":{"id":5,"text":"html"}},{"id":119515,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1985/4087/report-thumb.jpg"},{"id":58730,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1985/4087/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Minnesota","city":"St. Louis Park","otherGeospatial":"Prairie du Chien-Jordan aquifer","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -93.167,\n 45.083\n ],\n [\n -93.583,\n 45.083\n ],\n [\n -93.583,\n 44.783\n ],\n [\n -93.167,\n 44.783\n ],\n [\n -93.167,\n 45.083\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4aafe4b07f02db66cd74","contributors":{"authors":[{"text":"Stark, J. R.","contributorId":100406,"corporation":false,"usgs":true,"family":"Stark","given":"J. R.","affiliations":[],"preferred":false,"id":202343,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hult, M. F.","contributorId":29817,"corporation":false,"usgs":true,"family":"Hult","given":"M.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":202342,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012689,"text":"70012689 - 1985 - Determination of elastic wave velocity and relative hypocenter locations using refracted waves. I. Methodology","interactions":[],"lastModifiedDate":"2023-10-29T15:46:39.969615","indexId":"70012689","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Determination of elastic wave velocity and relative hypocenter locations using refracted waves. I. Methodology","docAbstract":"An arrival time difference method utilizing refracted arrivals from earthquakes in a homogeneous, layered earth model has been developed for the simultaneous determination of near-source (in situ) velocity and relative locations of earthquakes. The method is particularly applicable when analyzing data from arrays in which most of the recording stations are far (i.e., several focal depths) from a group of events. This iterative scheme locates earthquakes relative to a master event and performs an inversion for in situ velocity using a generalized inverseleast squares estimation procedure. Direct arrivals, when available, may be included to stabilize the inversion and increase the accuracy of the event locations. We tested this scheme on artificial data contaminated by random and systematic arrival time errors, gaps in azimuthal coverage, and inaccuracies in the assumed velocity model. As usual, depth is the least well-resolved hypocenter coordinate, but this scheme yielded accurate locations of most events while converging to the correct velocity model.
","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0750020415","issn":"00371106","usgsCitation":"Shedlock, K.M., and Roecker, S.W., 1985, Determination of elastic wave velocity and relative hypocenter locations using refracted waves. I. Methodology: Bulletin of the Seismological Society of America, v. 75, no. 2, p. 415-426, https://doi.org/10.1785/BSSA0750020415.","productDescription":"12 p.","startPage":"415","endPage":"426","numberOfPages":"12","costCenters":[],"links":[{"id":222549,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"75","issue":"2","noUsgsAuthors":false,"publicationDate":"1985-04-01","publicationStatus":"PW","scienceBaseUri":"5059fd42e4b0c8380cd4e714","contributors":{"authors":[{"text":"Shedlock, Kaye M.","contributorId":61788,"corporation":false,"usgs":true,"family":"Shedlock","given":"Kaye","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":364230,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Roecker, Steven W.","contributorId":34266,"corporation":false,"usgs":true,"family":"Roecker","given":"Steven","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":364229,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012688,"text":"70012688 - 1985 - Effects of the 1983 Coalinga, California, earthquake on creep along the San Andreas fault","interactions":[],"lastModifiedDate":"2022-12-23T14:57:03.555808","indexId":"70012688","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Effects of the 1983 Coalinga, California, earthquake on creep along the San Andreas fault","docAbstract":"The M//L approximately equals 6. 5 earthquake that occurred near Coalinga, California, on May 2, 1983 induced changes in near-surface fault slip along the San Andreas fault. Coseismic steps were observed by creepmeters along a 200-km section of the San Andreas. some of the larger aftershocks induced additional steps, both right-lateral and left-lateral, and in general the sequence disrupted observed creep at several sites from preseismic long-term patterns. Static dislocation models can approximately explain the magnitudes and distribution of the larger coseismic steps on May 2. The smaller, more distant steps appear to be the abrupt release of accumulated slip, triggered by the coseismic strain changes, but independent of the strain change amplitudes.","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0750020475","issn":"00371106","usgsCitation":"Mavko, G.M., Schulz, S., and Brown, B.D., 1985, Effects of the 1983 Coalinga, California, earthquake on creep along the San Andreas fault: Bulletin of the Seismological Society of America, v. 75, no. 2, p. 475-489, https://doi.org/10.1785/BSSA0750020475.","productDescription":"15 p.","startPage":"475","endPage":"489","numberOfPages":"15","costCenters":[],"links":[{"id":222548,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":410995,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.geoscienceworld.org/ssa/bssa/article/75/2/475/118685/Effects-of-the-1983-Coalinga-California-earthquake","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"California","city":"Coalinga","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -120.54473876953125,\n 35.98245135784044\n ],\n [\n -120.12176513671875,\n 35.98245135784044\n ],\n [\n -120.12176513671875,\n 36.28192129773192\n ],\n [\n -120.54473876953125,\n 36.28192129773192\n ],\n [\n -120.54473876953125,\n 35.98245135784044\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"75","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a045be4b0c8380cd5092b","contributors":{"authors":[{"text":"Mavko, Gerald M.","contributorId":40477,"corporation":false,"usgs":true,"family":"Mavko","given":"Gerald","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":364226,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schulz, Sandra","contributorId":107701,"corporation":false,"usgs":true,"family":"Schulz","given":"Sandra","affiliations":[],"preferred":false,"id":364228,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brown, Beth D.","contributorId":97770,"corporation":false,"usgs":true,"family":"Brown","given":"Beth","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":364227,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70013903,"text":"70013903 - 1985 - Instability model for recurring large and great earthquakes in southern California","interactions":[],"lastModifiedDate":"2012-03-12T17:19:33","indexId":"70013903","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3209,"text":"Pure and Applied Geophysics PAGEOPH","active":true,"publicationSubtype":{"id":10}},"title":"Instability model for recurring large and great earthquakes in southern California","docAbstract":"The locked section of the San Andreas fault in southern California has experienced a number of large and great earthquakes in the past, and thus is expected to have more in the future. To estimate the location, time, and slip of the next few earthquakes, an earthquake instability model is formulated. The model is similar to one recently developed for moderate earthquakes on the San Andreas fault near Parkfield, California. In both models, unstable faulting (the earthquake analog) is caused by failure of all or part of a patch of brittle, strain-softening fault zone. In the present model the patch extends downward from the ground surface to about 12 km depth, and extends 500 km along strike from Parkfield to the Salton Sea. The variation of patch strength along strike is adjusted by trial until the computed sequence of instabilities matches the sequence of large and great earthquakes since a.d. 1080 reported by Sieh and others. The last earthquake was the M=8.3 Ft. Tejon event in 1857. The resulting strength variation has five contiguous sections of alternately low and high strength. From north to south, the approximate locations of the sections are: (1) Parkfield to Bitterwater Valley, (2) Bitterwater Valley to Lake Hughes, (3) Lake Hughes to San Bernardino, (4) San Bernardino to Palm Springs, and (5) Palm Springs to the Salton Sea. Sections 1, 3, and 5 have strengths between 53 and 88 bars; sections 2 and 4 have strengths between 164 and 193 bars. Patch section ends and unstable rupture ends usually coincide, although one or more adjacent patch sections may fail unstably at once. The model predicts that the next sections of the fault to slip unstably will be 1, 3, and 5; the order and dates depend on the assumed length of an earthquake rupture in about 1700. ?? 1985 Birkha??user Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics PAGEOPH","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Birkha??user-Verlag","doi":"10.1007/BF00876385","issn":"00334553","usgsCitation":"Stuart, W., 1985, Instability model for recurring large and great earthquakes in southern California: Pure and Applied Geophysics PAGEOPH, v. 122, no. 6, p. 793-811, https://doi.org/10.1007/BF00876385.","startPage":"793","endPage":"811","numberOfPages":"19","costCenters":[],"links":[{"id":226051,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205677,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00876385"}],"volume":"122","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3c23e4b0c8380cd62ade","contributors":{"authors":[{"text":"Stuart, W.D.","contributorId":65865,"corporation":false,"usgs":true,"family":"Stuart","given":"W.D.","email":"","affiliations":[],"preferred":false,"id":367132,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013263,"text":"70013263 - 1985 - Copper and silver accumulation in transplanted and resident clams (Macoma balthica) in South San Francisco Bay","interactions":[],"lastModifiedDate":"2020-01-19T10:54:00","indexId":"70013263","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Copper and silver accumulation in transplanted and resident clams (Macoma balthica) in South San Francisco Bay","docAbstract":"Accumulation of Cu and Ag by soft tissues of the deposit-feeding clam Macoma balthica was less than half in clams transplanted to a contaminated area than in clams native to that area. During a period of tissue growth, the transplants retained 50% and 90%, respectively, of the net Cu and Ag accumulated, but loss of metals from soft tissue by the resident population equalled net accumulation. Copper accumulation in the transplants did not occur during some periods when increases in the metal body burden of the resident population indicated that environmental exposures were high. The difference in metal accumulation of the two groups of clams may be the result of past environmental exposures. The results illustrate some limitations of using transplants as indicators of pollution events or of pollutant impact upon resident populations.
","language":"English","publisher":"Elsevier","doi":"10.1016/0141-1136(85)90133-3","issn":"01411136","usgsCitation":"Cain, D., and Luoma, S.N., 1985, Copper and silver accumulation in transplanted and resident clams (Macoma balthica) in South San Francisco Bay: Marine Environmental Research, v. 15, no. 2, p. 115-135, https://doi.org/10.1016/0141-1136(85)90133-3.","productDescription":"21 p.","startPage":"115","endPage":"135","numberOfPages":"21","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":219788,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"South San Francisco Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.84912109375,\n 37.274052809979054\n ],\n [\n -121.57470703125,\n 37.274052809979054\n ],\n [\n -121.57470703125,\n 37.88352498087131\n ],\n [\n -122.84912109375,\n 37.88352498087131\n ],\n [\n -122.84912109375,\n 37.274052809979054\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"15","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fbf7e4b0c8380cd4e060","contributors":{"authors":[{"text":"Cain, D.J.","contributorId":68329,"corporation":false,"usgs":true,"family":"Cain","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":365673,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Luoma, Samuel N. 0000-0001-5443-5091 snluoma@usgs.gov","orcid":"https://orcid.org/0000-0001-5443-5091","contributorId":2287,"corporation":false,"usgs":true,"family":"Luoma","given":"Samuel","email":"snluoma@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":779759,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013266,"text":"70013266 - 1985 - MODELING HYDRAULIC PROBLEMS USING THE CVBEM AND THE MICROCOMPUTER.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:17","indexId":"70013266","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"MODELING HYDRAULIC PROBLEMS USING THE CVBEM AND THE MICROCOMPUTER.","docAbstract":"The Complex Variable Boundary Element Method (CVBEM) offers an effective and efficient means for modeling two-dimensional potential and related flow problems. The method has been applied to various hydraulic and hydrodynamic problems - surface water, ground water, and other flows - and has proven its accuracy, reliability and usefulness. The paper describes the CVBEM and its application.","conferenceTitle":"Hydraulics and Hydrology in the Small Computer Age, Proceedings of the Specialty Conference.","conferenceLocation":"Lake Buena Vista, FL, USA","language":"English","publisher":"ASCE","publisherLocation":"New York, NY, USA","isbn":"0872624749","usgsCitation":"Lai, C., and Hromadka, T., 1985, MODELING HYDRAULIC PROBLEMS USING THE CVBEM AND THE MICROCOMPUTER., Hydraulics and Hydrology in the Small Computer Age, Proceedings of the Specialty Conference., Lake Buena Vista, FL, USA, p. 444-449.","startPage":"444","endPage":"449","numberOfPages":"6","costCenters":[],"links":[{"id":219791,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4ad3e4b0c8380cd690a2","contributors":{"authors":[{"text":"Lai, Chintu","contributorId":16860,"corporation":false,"usgs":true,"family":"Lai","given":"Chintu","email":"","affiliations":[],"preferred":false,"id":365681,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hromadka, T. V. II","contributorId":76464,"corporation":false,"usgs":true,"family":"Hromadka","given":"T. V.","suffix":"II","affiliations":[],"preferred":false,"id":365682,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014061,"text":"70014061 - 1985 - Anomalous hydrogen emissions from the San Andreas fault observed at the Cienega Winery, central California","interactions":[],"lastModifiedDate":"2012-03-12T17:19:29","indexId":"70014061","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3209,"text":"Pure and Applied Geophysics PAGEOPH","active":true,"publicationSubtype":{"id":10}},"title":"Anomalous hydrogen emissions from the San Andreas fault observed at the Cienega Winery, central California","docAbstract":"We began continuous monitoring of H2 concentration in soil along the San Andreas and Calaveras faults in central California in December 1980, using small H2/O2 fuel-cell sensors. Ten monitoring stations deployed to date have shown that anomalous H2 emissions take place occasionally in addition to diurnal changes. Among the ten sites, the Cienega Winery site has produced data that are characterized by very small diurnal changes, a stable baseline, and remarkably distinct spike-like H2 anomalies since its installation in July 1982. A major peak appeared on 1-10 November 1982, and another on 3 April 1983, and a medium peak on 1 November 1983. The occurrences of these peaks coincided with periods of very low seismicity within a radius of 50 km from the site. In order to methodically assess how these peaks are related to earthquakes, three H2 degassing models were examined. A plausible correlational pattern was obtained by using a model that (1) adopts a hemicircular spreading pattern of H2 along an incipient fracture plane from the hypocenter of an earthquake, (2) relies on the FeO-H2O reaction for H2 generation, and (3) relates the accumulated amount of H2 to the mass of serpentinization of underlying ophiolitic rocks; the mass was tentatively assumed to be proportional to the seismic energy of the earthquake. ?? 1985 Birkha??user Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics PAGEOPH","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Birkha??user-Verlag","doi":"10.1007/BF00874606","issn":"00334553","usgsCitation":"Sato, M., Sutton, A.J., and McGee, K., 1985, Anomalous hydrogen emissions from the San Andreas fault observed at the Cienega Winery, central California: Pure and Applied Geophysics PAGEOPH, v. 122, no. 2-4, p. 376-391, https://doi.org/10.1007/BF00874606.","startPage":"376","endPage":"391","numberOfPages":"16","costCenters":[],"links":[{"id":205627,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00874606"},{"id":225420,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"122","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec48e4b0c8380cd49188","contributors":{"authors":[{"text":"Sato, M.","contributorId":50201,"corporation":false,"usgs":true,"family":"Sato","given":"M.","email":"","affiliations":[],"preferred":false,"id":367476,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sutton, A. J. 0000-0003-1902-3977","orcid":"https://orcid.org/0000-0003-1902-3977","contributorId":28983,"corporation":false,"usgs":true,"family":"Sutton","given":"A.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":367475,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McGee, K.A.","contributorId":6059,"corporation":false,"usgs":true,"family":"McGee","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":367474,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70013364,"text":"70013364 - 1985 - PRESENT STATUS OF RESEARCH IN DEBRIS FLOW MODELING.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:37","indexId":"70013364","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"PRESENT STATUS OF RESEARCH IN DEBRIS FLOW MODELING.","docAbstract":"A viable rheological model should consist of both a time-independent part and a time-dependent part. A generalized viscoplastic fluid model that has both parts as well as two major rheological properties (i. e. , the normal stress effect and soil yield criteria) is shown to be sufficiently accurate, yet practical, for general use in debris flow modeling. Other rheological models, such as the Bingham plastic fluid model and the so-called Coulomb-viscous model, are compared in terms of the generalized viscoplastic fluid model.","conferenceTitle":"Hydraulics and Hydrology in the Small Computer Age, Proceedings of the Specialty Conference.","conferenceLocation":"Lake Buena Vista, FL, USA","language":"English","publisher":"ASCE","publisherLocation":"New York, NY, USA","isbn":"0872624749","usgsCitation":"Chen, C., 1985, PRESENT STATUS OF RESEARCH IN DEBRIS FLOW MODELING., Hydraulics and Hydrology in the Small Computer Age, Proceedings of the Specialty Conference., Lake Buena Vista, FL, USA, p. 733-741.","startPage":"733","endPage":"741","numberOfPages":"9","costCenters":[],"links":[{"id":220303,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7375e4b0c8380cd7704d","contributors":{"authors":[{"text":"Chen, Cheng-lung","contributorId":30752,"corporation":false,"usgs":true,"family":"Chen","given":"Cheng-lung","email":"","affiliations":[],"preferred":false,"id":365906,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013605,"text":"70013605 - 1985 - SOLVING THE TWO-DIMENSIONAL DIFFUSION FLOW MODEL.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:18","indexId":"70013605","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"SOLVING THE TWO-DIMENSIONAL DIFFUSION FLOW MODEL.","docAbstract":"A simplification of the two-dimensional (2-D) continuity and momentum equations is the diffusion equation. To investigate its capability, the numerical model using the diffusion approach is applied to a hypothetical failure problem of a regional water reservoir. The model is based on an explicit, integrated finite-difference scheme, and the floodplain is simulated by a popular home computer which supports 64K FORTRAN. Though simple, the 2-D model can simulate some interesting flooding effects that a 1-D full dynamic model cannot.","conferenceTitle":"Hydraulics and Hydrology in the Small Computer Age, Proceedings of the Specialty Conference.","conferenceLocation":"Lake Buena Vista, FL, USA","language":"English","publisher":"ASCE","publisherLocation":"New York, NY, USA","isbn":"0872624749","usgsCitation":"Hromadka, T., and Lai, C., 1985, SOLVING THE TWO-DIMENSIONAL DIFFUSION FLOW MODEL., Hydraulics and Hydrology in the Small Computer Age, Proceedings of the Specialty Conference., Lake Buena Vista, FL, USA, p. 555-562.","startPage":"555","endPage":"562","numberOfPages":"8","costCenters":[],"links":[{"id":219866,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaf6de4b0c8380cd875a0","contributors":{"authors":[{"text":"Hromadka, T. V. II","contributorId":76464,"corporation":false,"usgs":true,"family":"Hromadka","given":"T. V.","suffix":"II","affiliations":[],"preferred":false,"id":366466,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lai, Chintu","contributorId":16860,"corporation":false,"usgs":true,"family":"Lai","given":"Chintu","email":"","affiliations":[],"preferred":false,"id":366465,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70009928,"text":"70009928 - 1985 - Global geologic mapping of Mars: The western equatorial region","interactions":[],"lastModifiedDate":"2013-02-20T20:50:01","indexId":"70009928","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":661,"text":"Advances in Space Research","active":true,"publicationSubtype":{"id":10}},"title":"Global geologic mapping of Mars: The western equatorial region","docAbstract":"Global geologic mapping of Mars was originally accomplished following acquisition of orbital spacecraft images from the Mariner 9 mission. The mapping program represented a joint enterprise by the U.S. Geological Survey and other planetary scientists from universities in the United States and Europe. Many of the Mariner photographs had low resolution or poor albedo contrast caused by atmospheric haze and high-sun angles. Some of the early geologic maps reflect these deficiencies in their poor discrimination and subdivision of rock units. New geologic maps made from higher resolution and better quality Viking images also represent a cooperative effort, by geologists from the U.S. Geological Survey, Arizona State University, and the University of London. This second series of global maps consists of three parts: 1) western equatorial region, 2) eastern equatorial region, and 3) north and south polar regions. These maps, at 1:15 million scale, show more than 60 individual rock-stratigraphic units assigned to three Martian time-stratigraphic systems. The first completed map of the series covers the western equatorial region of Mars. Accompanying the map is a description of the sequence and distribution of major tectonic, volcanic, and fluvial episodes as recorded in the stratigraphic record. ?? 1985.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Space Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0273-1177(85)90243-1","issn":"02731177","usgsCitation":"Scott, D.H., 1985, Global geologic mapping of Mars: The western equatorial region: Advances in Space Research, v. 5, no. 8, p. 71-82, https://doi.org/10.1016/0273-1177(85)90243-1.","startPage":"71","endPage":"82","numberOfPages":"12","costCenters":[],"links":[{"id":218923,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":267876,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0273-1177(85)90243-1"}],"volume":"5","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2948e4b0c8380cd5a80c","contributors":{"authors":[{"text":"Scott, D. H.","contributorId":73565,"corporation":false,"usgs":true,"family":"Scott","given":"D.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":357477,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013261,"text":"70013261 - 1985 - ART AND SCIENCE OF IMAGE MAPS.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:29","indexId":"70013261","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"ART AND SCIENCE OF IMAGE MAPS.","docAbstract":"The visual image of reflected light is influenced by the complex interplay of human color discrimination, spatial relationships, surface texture, and the spectral purity of light, dyes, and pigments. Scientific theories of image processing may not always achieve acceptable results as the variety of factors, some psychological, are in part, unpredictable. Tonal relationships that affect digital image processing and the transfer functions used to transform from the continuous-tone source image to a lithographic image, may be interpreted for an insight of where art and science fuse in the production process. The application of art and science in image map production at the U. S. Geological Survey is illustrated and discussed.","largerWorkTitle":"Technical Papers of the American Society of Photogrammetry, Annual Meeting","conferenceTitle":"Technical Papers, 51st Annual Meeting, 1985 ASP-ACSM Convention: Theodolite to Satellite.","conferenceLocation":"Washington, DC, USA","language":"English","publisher":"American Soc of Photogrammetry","publisherLocation":"Falls Church, VA, USA","isbn":"0937294640","usgsCitation":"Kidwell, R.D., and McSweeney, J.A., 1985, ART AND SCIENCE OF IMAGE MAPS., in Technical Papers of the American Society of Photogrammetry, Annual Meeting, v. 2, Washington, DC, USA, p. 771-782.","startPage":"771","endPage":"782","numberOfPages":"12","costCenters":[],"links":[{"id":220636,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e636e4b0c8380cd47255","contributors":{"authors":[{"text":"Kidwell, Richard D.","contributorId":31111,"corporation":false,"usgs":true,"family":"Kidwell","given":"Richard","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":365670,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McSweeney, Joseph A.","contributorId":51908,"corporation":false,"usgs":true,"family":"McSweeney","given":"Joseph","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":365671,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":1013653,"text":"1013653 - 1985 - Allowable ammonia for fish culture","interactions":[],"lastModifiedDate":"2025-07-30T19:05:39.102047","indexId":"1013653","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3196,"text":"Progressive Fish-Culturist","active":true,"publicationSubtype":{"id":10}},"title":"Allowable ammonia for fish culture","docAbstract":"A review of the published literature on effects of ammonia on fish indicates that un‐ionized ammonia alone is probably not the cause of gill hyperplasia, indicative of, or previously attributed to, chronic ammonia poisoning. The maximum safe concentration of un‐ionized ammonia is unknown, but in many cases it is not close to the 0.0125 mg/L value commonly accepted by fish culturists.
","language":"English","publisher":"Oxford Academic","doi":"10.1577/1548-8640(1985)47%3C135:AAFFC%3E2.0.CO;2","usgsCitation":"Meade, J.W., 1985, Allowable ammonia for fish culture: Progressive Fish-Culturist, v. 47, no. 3, p. 135-145, https://doi.org/10.1577/1548-8640(1985)47%3C135:AAFFC%3E2.0.CO;2.","productDescription":"11 p.","startPage":"135","endPage":"145","numberOfPages":"11","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":130593,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adee4b07f02db687635","contributors":{"authors":[{"text":"Meade, J. W.","contributorId":38082,"corporation":false,"usgs":true,"family":"Meade","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":318976,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70009927,"text":"70009927 - 1985 - Preliminary evaluation of the landsat-4 thematic mapper data for mineral exploration","interactions":[],"lastModifiedDate":"2013-02-20T20:48:57","indexId":"70009927","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":661,"text":"Advances in Space Research","active":true,"publicationSubtype":{"id":10}},"title":"Preliminary evaluation of the landsat-4 thematic mapper data for mineral exploration","docAbstract":"Landsat-4 Thematic Mapper (TM) data recorded over an arid terrain were analyzed to determine the applicability of using of TM data for identifying and mapping hydrothermally altered, potentially mineralized rocks. Clays, micas, and other minerals bearing the OH anion in specific crystal lattice positions have absorption bands in the 2.2-??m region (TM channel 7, TM7) and commonly lack features in the 1.6-??m region (TM5). Channel ratios TM5/TM7, TM5/TM4, and TM3/TM1 were combined into a color-ratio-composite (CRC) image and used to distinguish hydrothermally altered rocks, unaltered rocks, and vegetation. These distinctions are made possible by using the TM5 and TM7, channels which are not available in the Landsat multispectral scanner (MSS). Digital masking was used to eliminate ambiguities due to water and shadows. However, some ambiguities in identification resulted between altered volcanic rocks and unaltered sedimentary deposits that contained clays, carbonates, and gypsum, and between altered volcanic rocks and volcanic tuffs diagenetically altered to zeolites. However, compared to MSS data, TM data should greatly improve the ability to map hydrothermally altered rocks in arid terrains. ?? 1985.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Space Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0273-1177(85)90252-2","issn":"02731177","usgsCitation":"Podwysocki, M.H., Power, M., and Jones, O.D., 1985, Preliminary evaluation of the landsat-4 thematic mapper data for mineral exploration: Advances in Space Research, v. 5, no. 5, p. 13-20, https://doi.org/10.1016/0273-1177(85)90252-2.","startPage":"13","endPage":"20","numberOfPages":"8","costCenters":[],"links":[{"id":218922,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":267875,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0273-1177(85)90252-2"}],"volume":"5","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a840de4b0c8380cd7c2a2","contributors":{"authors":[{"text":"Podwysocki, M. H.","contributorId":70391,"corporation":false,"usgs":true,"family":"Podwysocki","given":"M.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":357475,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Power, M.S.","contributorId":102896,"corporation":false,"usgs":true,"family":"Power","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":357476,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jones, O. D.","contributorId":42700,"corporation":false,"usgs":true,"family":"Jones","given":"O.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":357474,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70013262,"text":"70013262 - 1985 - SCHLUMBERGER SOUNDING RESULTS OVER THE NEWBERRY VOLCANO AREA, OREGON.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:29","indexId":"70013262","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"SCHLUMBERGER SOUNDING RESULTS OVER THE NEWBERRY VOLCANO AREA, OREGON.","docAbstract":"Schlumberger soundings were made in the Newberry volcano area of Oregon to categorize the electrical properties of possible Cascade geothermal systems. An east-west geoelectric cross section constructed from the interpreted soundings shows a low-resistivity zone in the caldera, that corresponds to the increase in thermal gradient observed in a U. S. Geological Survey test well. Another low resistivity zone about 600 m deep is present just to the west of the caldera boundary. A north-south geoelectric cross section shows the configuration of the western low-resistivity zone. Maps of interpreted resistivity at depths of 750 and 1000 m show that the main low resistivity area west of the caldera has two tongues, one oriented easterly and the other oriented southerly.","largerWorkTitle":"Transactions - Geothermal Resources Council","conferenceTitle":"1985 International Symposium on Geothermal Energy. Geothermal Resources Council 1985 Annual Meeting.","conferenceLocation":"Kailua-Kona, HI, USA","language":"English","publisher":"Geothermal Resources Council","publisherLocation":"Davis, CA, USA","issn":"01935933","isbn":"093441260X","usgsCitation":"Bisdorf, R.J., 1985, SCHLUMBERGER SOUNDING RESULTS OVER THE NEWBERRY VOLCANO AREA, OREGON., in Transactions - Geothermal Resources Council, v. 9, no. pt 2, Kailua-Kona, HI, USA, p. 389-394.","startPage":"389","endPage":"394","numberOfPages":"6","costCenters":[],"links":[{"id":220637,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"pt 2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaf12e4b0c8380cd87398","contributors":{"authors":[{"text":"Bisdorf, Robert J.","contributorId":107277,"corporation":false,"usgs":true,"family":"Bisdorf","given":"Robert","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":365672,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70009914,"text":"70009914 - 1985 - Results of interlaboratory comparison of fission-track age standards: Fission-track workshop-1984","interactions":[],"lastModifiedDate":"2013-03-06T20:02:08","indexId":"70009914","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2913,"text":"Nuclear Tracks and Radiation Measurements (1982)","active":true,"publicationSubtype":{"id":10}},"title":"Results of interlaboratory comparison of fission-track age standards: Fission-track workshop-1984","docAbstract":"Five samples were made available as standards for the 1984 Fission Track Workshop held in the summer of 1984 (Rensselaer Polytechnic Institute, Troy, New York). Two zircons, two apatites and a sphene were distributed prior to the meeting to 40 different laboratories. To date, 24 different analysts have reported results. The isotopic ages of the standards ranged from 16.8 to 98.7 Myr. Only the statement that the age of each sample was less than 200 Myr was provided with the set of standards distributed. Consequently, each laboratory was required to use their laboratory's accepted treatment (irradiation level, etching conditions, counting conditions, etc.) for these samples. The results show that some workers have serious problems in achieving accurate age determinations. This emphasizes the need to calibrate experimental techniques and counting procedures against age standards before unknown ages are determined. Any fission-track age determination published or submitted for publication can only be considered reliable if it is supported by evidence of consistent determinations on age standards. Only this can provide the scientific community with the background to build up confidence concerning the validity of the fission-track method. ?? 1985.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nuclear Tracks and Radiation Measurements (1982)","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0735-245X(85)90127-9","issn":"0735245X","usgsCitation":"Miller, D.S., Duddy, I., Green, P., Hurford, A., and Naeser, C.W., 1985, Results of interlaboratory comparison of fission-track age standards: Fission-track workshop-1984: Nuclear Tracks and Radiation Measurements (1982), v. 10, no. 3, p. 383-391, https://doi.org/10.1016/0735-245X(85)90127-9.","startPage":"383","endPage":"391","numberOfPages":"9","costCenters":[],"links":[{"id":218687,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":268860,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0735-245X(85)90127-9"}],"volume":"10","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aab68e4b0c8380cd86814","contributors":{"authors":[{"text":"Miller, D. S.","contributorId":64260,"corporation":false,"usgs":true,"family":"Miller","given":"D.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":357445,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Duddy, I.R.","contributorId":41581,"corporation":false,"usgs":true,"family":"Duddy","given":"I.R.","email":"","affiliations":[],"preferred":false,"id":357444,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Green, P.F.","contributorId":35062,"corporation":false,"usgs":true,"family":"Green","given":"P.F.","email":"","affiliations":[],"preferred":false,"id":357443,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hurford, A.J.","contributorId":21669,"corporation":false,"usgs":true,"family":"Hurford","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":357442,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Naeser, C. W.","contributorId":17582,"corporation":false,"usgs":true,"family":"Naeser","given":"C.","middleInitial":"W.","affiliations":[],"preferred":false,"id":357441,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70013366,"text":"70013366 - 1985 - INTRABAND RADIOMETRIC PERFORMANCE OF THE LANDSAT 4 THEMATIC MAPPER.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:37","indexId":"70013366","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"INTRABAND RADIOMETRIC PERFORMANCE OF THE LANDSAT 4 THEMATIC MAPPER.","docAbstract":"This preliminary report examines those radiometric characteristics of the Landsat 4 Thematic Mapper (TM) that can be established without absolute calibration of spectral data. Analysis is based largely on radiometrically raw (B type) data of three daytime and two nighttime scenes; in most scenes, a set of 512 lines were examined on an individual-detector basis. Subscenes selected for uniform-radiance were used to characterize subtle radiometric differences and noise problems.","largerWorkTitle":"NASA Conference Publication","conferenceTitle":"Landsat-4 Science Characterization Early Results.","conferenceLocation":"Greenbelt, MD, USA","language":"English","publisher":"NASA Scientific & Technical Information Branch","publisherLocation":"Washington, DC, USA","issn":"01917811","usgsCitation":"Kieffer, H.H., Eliason, E.M., and Chavez, P.S., 1985, INTRABAND RADIOMETRIC PERFORMANCE OF THE LANDSAT 4 THEMATIC MAPPER., in NASA Conference Publication, Greenbelt, MD, USA.","costCenters":[],"links":[{"id":220305,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a37d3e4b0c8380cd611cf","contributors":{"editors":[{"text":"Barker John L.","contributorId":128362,"corporation":true,"usgs":false,"organization":"Barker John L.","id":536268,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Kieffer, Hugh H.","contributorId":41137,"corporation":false,"usgs":false,"family":"Kieffer","given":"Hugh","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":365912,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eliason, Eric M.","contributorId":21280,"corporation":false,"usgs":true,"family":"Eliason","given":"Eric","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":365910,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chavez, Pat S. Jr.","contributorId":39870,"corporation":false,"usgs":true,"family":"Chavez","given":"Pat","suffix":"Jr.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":365911,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70012931,"text":"70012931 - 1985 - Evolution and present state of the hydrothermal system in Long Valley caldera","interactions":[],"lastModifiedDate":"2024-06-27T15:36:01.804718","indexId":"70012931","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Evolution and present state of the hydrothermal system in Long Valley caldera","docAbstract":"Evidence for previous periods of hydrothermal activity in Long Valley caldera exists in the form of extensive deposits of hydrothermal alteration products at several locations within the caldera and saline deposits in Searles Lake which contain mineral assemblages contributed by hot spring discharge from Long Valley. Hydrothermal activity was more intense in the past and probably involved fluid circulation to depths of several kilometers or more with heat supplied by the Long Valley magma chamber. During the past 40,000 years the heat source may have shifted to the Inyo-Mono magmatic system beneath the west moat, where deep fluid circulation supplied hot water to shallower zones of lateral flow within the Bishop Tuff beneath the resurgent dome. The present-day hydrothermal system in Long Valley appears to consist of two principal zones in which hot water flows laterally from west to east at depths of less than 1 km within and around the resurgent dome. Maximum measured temperatures within these zones are near 170°C, but estimates from chemical geothermometers and extrapolation of a high-temperature gradient measured in a recent drill hole indicate that a source reservoir at temperatures near 240° may exist at greater depths within the Bishop Tuff beneath the west moat. Regions possibly containing silicic melt detected by shear wave attenuation at depths of 4–5 km beneath the resurgent dome have probably not been in place long enough to influence sensibly the overlying thermal regime within the upper 2 km of caldera fill.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB090iB13p11219","issn":"01480227","usgsCitation":"Sorey, M., 1985, Evolution and present state of the hydrothermal system in Long Valley caldera: Journal of Geophysical Research Solid Earth, v. 90, no. B13, p. 11219-11228, https://doi.org/10.1029/JB090iB13p11219.","productDescription":"10 p.","startPage":"11219","endPage":"11228","costCenters":[],"links":[{"id":222563,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"90","issue":"B13","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a0d76e4b0c8380cd5302b","contributors":{"authors":[{"text":"Sorey, M.L.","contributorId":73185,"corporation":false,"usgs":true,"family":"Sorey","given":"M.L.","affiliations":[],"preferred":false,"id":364868,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013006,"text":"70013006 - 1985 - Correlations among hydrocarbon microseepage, soil chemistry, and uptake of micronutrients by plants, Bell Creek oil field, Montana","interactions":[],"lastModifiedDate":"2024-04-18T23:57:41.309704","indexId":"70013006","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Correlations among hydrocarbon microseepage, soil chemistry, and uptake of micronutrients by plants, Bell Creek oil field, Montana","docAbstract":"Chelate-extractable iron and manganese concentrations in soils over and around the Bell Creek oil field suggest that compared to low average background values, there are moderate amounts of these elements directly over the production area and higher concentrations distributed in an aureole pattern around the periphery of the field. Adsorbed and organically bound iron and manganese appear to be readily taken up by plants resulting in anomalously high levels of these elements in leaves and needles over the oil field and suggesting correlation with corresponding low concentrations in soils. Iron and manganese appear to have bypassed the soil formation process where, under normal oxidizing conditions, they would have ultimately precipitated as insoluble oxides and hydroxides.