Wednesday, April 4, 2018 1:52 pm

This information represents a digital version of the polygon units shown on "Bedrock Geologic Map of Wisconsin," originally published in 1982 at a scale of 1:1,000,000. The bedrock geology shown is a lithostratigraphic interpretation of the consolidated (rock) units present at the land surface or, in most areas, the first consolidated (rock) unit encountered beneath variable thicknesses of unconsolidated glacial sediment. The data include not only the distribution of the various bedrock units, but also a general description of the lithologic character and nomenclatural identification. This dataset provides users with a digital representation of the distribution of the bedrock units in Wisconsin and should not be used for site-specific geologic assessment.

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Wednesday, April 4, 2018 1:52 pm

Work was completed on the Esmeralda-Stateline Mineral Resource Inventory in two complementary stages. First, a search of the literature was made, and data on mineral occurrences within the project area compiled on short from Nevada CRIB forms. Courthouse records were then examined to obtain names and locations of active mining claims within the inventory area. All of the information was plotted on maps for field use. Folios were then prepared for each mining district, which included the CRIB forms, notes on mining claims, and pertinent references. This material provided the basis for planning the second stage of the inventory, the field examinations. NBMG OFR-83-11. To download this resource, please see the link provided.

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Wednesday, April 4, 2018 1:52 pm

Assessment of the geothermal potential in the Gabbs area for energy production. As part of its program to assess the geothermal potential, the Nevada Department of Energy contracted with Geothermal Development Associates to prepare a plan for geothermal utilization for the City of Gabbs. This report describes the results of the analyses as well as a plan for geothermal development. It identifies the major findings and specific barriers to development that would have to be addressed. To download this resource, please see the link provided.

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Wednesday, April 4, 2018 1:52 pm

Audio Magnetotelluric Data Log for Steamboat Hills, Nevada. USGS OFR- 75-447

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Wednesday, April 4, 2018 1:52 pm

Fugro Gravity and Magnetics Services (Houston) with Fugro Electro Magnetics Italy Srl carried out a full tensor, broadband magnetotelluric survey of 59 soundings under contract from University of Alaska. Two MT field teams deployed up to 3 MT systems each (ADU-07e Metronix receivers and sensors) for overnight recording, thus producing up to 6 MT soundings per day. Fieldwork was completed between August 13 and August 28, 2012. Inversion for 3D resistivity structure was performed using the Fugro RLM-3D MT code. Full tensor complex impedances were inverted in the frequency range from 0.032 Hz to 5.62 kHz, using 4 frequencies per decade, on a 384 core cluster. Both unconstrained (blind) and constrained inversions were carried out. For the constrained inversion, the starting and a priori model in 3D inversions included shallow structure from resistivity-depth maps obtained from the Resolve airborne EM survey, conducted by Fugro Airborne Surveys Corp., Mississauga, Canada. Report 78 pages, Append. A-D. 50 Figures, 8 Tables.

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Wednesday, April 4, 2018 1:52 pm

Abstract: Testing of single-ended optical fibers for monitoring temperatures in geothermal production began at the Beowawe, Nevada geothermal field in June 1996. High-temperature rated polyamide-coated fibers were badly damaged within weeks in flowing wells. Optical time domain reflectometry measurements show no appreciable degradation of replacement teflon-coated and polycarbon-coated fibers after 18 and 15 months of continuous service. Comparison of the DTS temperature data with research-quality conventional temperature logs shows that considerable care must be taken in obtaining the optical fiber data if repeatable temperatures within 1 to 3F are desired. These data demonstrate that the long-term cooling trend of all three Beowawe production wells has greatly diminished or ceased entirely. To download this resource, please see the link provided.

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Wednesday, April 4, 2018 1:51 pm

This resource is available as a downloadable file, ESRI Service, and as a Web Feature service. Resource includes a Bedrock map, Tectonic map, and text on Bedrock geology for the Vermont portion of the Averill quadrangle. For more information see links provided. Abstract: The Averill quadrangle lies within a belt of Silurian and Devonian rocks which extends from east-central Vermont to the Gaspe peninsula in Quebec. Metasedimentary rocks in the quadrangle belong to the Gile Mountain Formation of Devonian age. The Gile Mountain Formation in the Averill area is comprised of six mappable lithologic units forming an association which is typical of a eugeosynclinal sedimentary environment. These are: (1) phyllitic quartzmica schist, (2) subgraywacke characterized by thick graded beds, (3) hornblende schist, (4) dark gray slate and phyllite containing lenses of (5) feldspathic grits, and (6) light gray phyllite with minor schist, quartzite, impure limestone, and calc-silicate rocks.

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Wednesday, April 4, 2018 1:50 pm

This resource is a metadata compilation for gray literature, reports, maps, data, and personal documents pertaining to geothermal exploration in Nevada.The Nevada Bureau of Mines and Geology retains a legacy collection of geothermal documents that were made available for inclusion into the National Geothermal Data System. This resource was provided by the Nevada Bureau of Mines and Geology and made available for publication thought the National Geothermal Data System.

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Wednesday, April 4, 2018 1:50 pm

This resource is a metadata compilation of bibliographic references related to Alaskan geothermal research activity. This compilation includes 37 documents delivered to the US DOE Office of Scientific and Technical Information as OSTI scanned documents, as well as to the AASG Geothermal Data Project. Document topics include geochemistry, geothermal potential, energy alternatives, thermal studies, and faults and other structures for the state of Alaska. The Excel workbook contains 6 worksheets, including information about the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and vocabularies for use in populating the data worksheet (data valid terms). This resource was compiled by the Alaska Division of Geological and Geophysical Surveys and made available for distribution through the National Geothermal Data System.

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Wednesday, April 4, 2018 1:49 pm

This resource is available as a downloadable file, ESRI Service, and as a Web Feature service. Resource includes a Bedrock map, Lineations map, Tectonic map, Quarry map, Cross Section, and a text for Bedrock geology for the Geology of the St. Johnsbury quadrangle, Vermont and New Hampshire. For more information see links provided. Abstract: Metamorphosed sedimentary and volcanic rocks of Ordovieian, Silurian and/or Devonian age underlie the St. Johnsbury quadrangle. The Ordovician rocks are part of the New Flampshire sequence and have been assigned to two formations, the Albee and Ammonoosue. The Albee formation consists of 4,000 feet of slate, quartz-mica schist, micaceous quartzite, and quartzite. The Ammonoosnc volcanics are chiefly metamorphosed soda rhyolite tuffs and flows, with some black slate and quartz-mica schist.

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Wednesday, April 4, 2018 1:49 pm

The Las Vegas ground-water basin as described in this report includes the southern part of Indian Spring Valley, Three Lakes Valley, the northern half of Ivanpah Valley, and Las Vegas Valley. These valleys in part are inferred to form a hydrologic unit that includes an area of about 3,000 square miles in the southern part of Clark County, Nev. USGS WSP-1780.

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Wednesday, April 4, 2018 1:48 pm

This resource is available as a downloadable file, ESRI Service, and as a Web Map service. Resource includes a Bedrock map, Cross Section image, Tectonic map, Stratigraphic column image, Glacial map, Schematic map, and a text for the Bedrock geology of the Equinox Quadrangle and Vicinity, Vermont. For more information see links provided. Abstract: The Equinox quadrangle and a small strip from its western boundary to the New York State line were mapped geologically. Three main sections were studied. From east to west they are the Green Mountains, Vermont Valley, and Taconic Range plus a small portion of the western low hills section. Formations studied range in age from pre Cambrian to middle or upper Ordovician.

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Wednesday, April 4, 2018 1:47 pm

This resource is a compilation of a specific suite of aqueous chemistry for Alaska thermal groundwater, tailored for use in the geothermometry model formulated by Powell and Cumming, 2010. Analytes reported can be directly input into their model, which displays ternary diagrams to interpret potential source and temperatures of thermal waters based on chemistry and other parameters. Citation: Powell, Tom and Cumming, William 2010. Spreadsheets for Geothermal Water and Gas Geochemistry. Thirty-Fifth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 1-3, 2010. SGP-TR-188 (http://repository.stategeothermaldata.org/repository/resource/9e15e1a59b768b330d029e86dc023a37/). The data are available in the following formats: web feature service, web map service, ESRI MapServer, and an Excel workbook for download. The workbook contains 4 worksheets, including information about the template with notes related to revisions of the template, resource provider information, the data and a field list (to assist data mapping). This resource was provided by the Alaska Division of Geological and Geophysical Surveys and made available for distribution through the National Geothermal Data System.

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Wednesday, April 4, 2018 1:47 pm

This resource is available as a downloadable file, ESRI Service, and as a Web Map service. Resource includes a Bedrock map, Tectonic map, and text on Bedrock geology for the Woodstock Quadrangle, Vermont. For more information see links provided. Abstract: The Woodstock quadrangle, in east-central Vermont, lies partly on the eastern limb of the Green Mountain anticlinorium and partly in the region of domes and recumbent folds of eastern Vermont. The oldest rocks belong to the Precambrian Mount Holly complex and are exposed in the extreme southwest corner of the area. These are overlain eastward by younger strata. They include the Tyson, Hoosac and Pinnev Hollow formations at the base and the Gile Mountain, Standing Pond and Waits River formations at the top. Twelve major units as well as certain of their subdivisions have been mapped. These rocks range in probable age from lowest Cambrian to Devonian and have a total thickness of more than 20,000 feet. Nearly the entire eastern Vermont sequence is thus exposed in the quadrangle.

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Wednesday, April 4, 2018 1:46 pm

This resource is available as a downloadable file, ESRI Service, and as a Web Feature service. Bulletin includes a Geologic Map of the Green Mountain Anticlinorium in the Vicinity of Rochester and East Middlebury, Vermont and a Tectonic map of the Green Mountain Anticlinorium in the Vicinity of Rochester and East Middlebury, Vermont. Abstract: The Green Mountain anticlinorium was studied in detail in the northern half of the Rochester quadrangle and in the East Middlebury quadrangle, Vermont. The rocks of this area belong to two Lower Paleozoic stratigraphic sequences, contrasting in lithology but more or less equivalent in time. Both sequences rest unconformably on the PreCambrian complex.

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