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This dataset contains information and locations on faults and associated folds in Alaska that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). The dataset is intended to part of the USGS archive for historic and ancient earthquake sources used in current and future probabilistic seismic-hazard analyses. This dataset presents a single source that summarizes important information on paleoseismic (ancient earthquakes) parameters including, age of most recent deformation, slip rate, slip sense dip direction, and accuracy of original mapping. These data are compiled from hundreds of journal articles, maps, theses, and other documents, as referenced herein. The geospatial...
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The US Geological Survey, in cooperation with the National Park Service, mapped 35 7.5-minute quadrangles, within a 2-mile-wide+ corridor centered on the Parkway, from BLRI (Blue Ridge Parkway) Mile Post (MP) 0 near Afton, Virginia southward to MP 218 at Cumberland Knob, approximately 1.3 km south of the Virginia – North Carolina State Line. Detailed bedrock geologic mapping for this project was conducted at 1:24,000-scale by systematically traversing roads, trails, creeks, and ridges within and adjacent to the 2-mile-wide+ corridor along the 216.9-mile length of the BLRI in Virginia. Geologic data at more than 23,000 station points were collected during this project (September 2009 – February 2014), with approximately...
Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Adney Gap, Air Bellows Gap, Alligator Back Formation, Antietam Formation, Ashe Formation, All tags...
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The US Geological Survey, in cooperation with the National Park Service, mapped 35 7.5-minute quadrangles, within a 2-mile-wide+ corridor centered on the Parkway, from BLRI (Blue Ridge Parkway) Mile Post (MP) 0 near Afton, Virginia southward to MP 218 at Cumberland Knob, approximately 1.3 km south of the Virginia – North Carolina State Line. Detailed bedrock geologic mapping for this project was conducted at 1:24,000-scale by systematically traversing roads, trails, creeks, and ridges within and adjacent to the 2-mile-wide+ corridor along the 216.9-mile length of the BLRI in Virginia. Geologic data at more than 23,000 station points were collected during this project (September 2009 – February 2014), with approximately...
Types: Citation; Tags: Adney Gap, Air Bellows Gap, Alligator Back Formation, Antietam Formation, Ashe Formation, All tags...
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On May 25, 2014, a rain-on-snow induced rock avalanche occurred in the West Salt Creek Valley on the northern flank of Grand Mesa in western Colorado. The avalanche traveled 4.6 km down the confined valley, killing 3 people. The avalanche was rare for the contiguous U.S. because of its large size (54.5 Mm3) and long travel distance. To understand the avalanche failure sequence, mechanisms, and mobility, we mapped landslide structures, geology, and ponds at 1:1000-scale. We used high-resolution, Unmanned Aircraft System (UAS) imagery from July 2014 as a base for our field mapping. Here we present the map data and UAS imagery. The data accompany an interpretive paper published in the journal Geosphere. The full citation...
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This map shows the subcrop pattern of the Mesozoic rock units present at the top Mesozoic unconformity (also commonly referred to as the base Tertiary unconformity) in Cook Inlet basin, Alaska. The subcrop is projected onto the top Mesozoic unconformity depth surface of Cook Inlet basin, Alaska, published by Shellenbaum and others (2010). Publicly available geologic and geophysical data from multiple sources were collected, interpreted, and integrated into the subcrop map. Formation picks at the top Mesozoic unconformity were determined for 109 wells. Mesozoic horizons from two regional marine two-dimensional (2-D) seismic datasets (approximately 3,300 miles) were interpreted. Eight map units were established for...
Tags: Anchorage, Anchorage Quadrangle, Bedrock Geologic Map, Bedrock Geology, Bibliography, All tags...
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Alaska is the most seismically active region of the United States. However, little information exists on the location, style of deformation, and slip rates of Quaternary faults. This interactive map displays locations and relative activity of Alaska's faults and folds. The map offers zoom and scroll options, and multiple base map layers. Click individual fault and fold traces to view basic fault parameters: name, age, slip rate, slip sense, dip direction, mapping certainty, and mapped scale. This resource is intended to provide simple and quick means of visualizing structure locations and characteristics. Users must recognize mapping certainty and data accuracy limitations when zooming in farther than the stated...
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Historic image LS_0439 is part of the 'UVA lantern slides' collection; the topic area is 'Folds'. Location is AK (imprecise). The image has the following description: 'USGS. Contorted cherts, Cooks Inlet, Alaska .' The image was scanned from a lantern slide as part of the USGS NGGDPP deliverable for 2017-2018. The physical location is 900 Natural Resources Dr., Ste 400, Charlottesville, VA 22903. Library. The author is unknown. The image is dated unknown.
Categories: Physical Item; Tags: Folds, Image, lantern slide
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Historic image LS_0508 is part of the 'UVA lantern slides' collection; the topic area is 'Folds'. Location is PA (imprecise). The image has the following description: 'Appalachian style fold in Canadian rocks with ____ (1905) near ___, Pa. .' The image was scanned from a lantern slide as part of the USGS NGGDPP deliverable for 2017-2018. The physical location is 900 Natural Resources Dr., Ste 400, Charlottesville, VA 22903. Library. The author is unknown. The image is dated 19050101.
Categories: Physical Item; Tags: Folds, Image, lantern slide
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Historic image LS_0453 is part of the 'UVA lantern slides' collection; the topic area is 'Folds'. Location is unknown (none). The image has the following description: 'Super folds, 1933-34 .' The image was scanned from a lantern slide as part of the USGS NGGDPP deliverable for 2017-2018. The physical location is 900 Natural Resources Dr., Ste 400, Charlottesville, VA 22903. Library. The author is W.H. Towles. The image is dated unknown.
Categories: Physical Item; Tags: Folds, Image, lantern slide
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Historic image LS_0438 is part of the 'UVA lantern slides' collection; the topic area is 'Folds'. Location is Bath Co. (estimated). The image has the following description: 'Anticline in Massanutten sandstone .' The image was scanned from a lantern slide as part of the USGS NGGDPP deliverable for 2017-2018. The physical location is 900 Natural Resources Dr., Ste 400, Charlottesville, VA 22903. Library. The author is N.H. Darton. The image is dated unknown.
Categories: Physical Item; Tags: Folds, Image, lantern slide
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Fault and fold features within the Torrington 30' X 60' Quadrangle, Goshen and Platte counties, Wyoming. It is a digitized version of bedrock geology map series developed by the Wyoming Geological Survey. The information provides basic bedrock geologic information and features to include named and geologic map units based on the rock types present. It is a STATEMAP product. This dataset is available for purchase through the WSGS, Digital Product MS-66. http://sales.wsgs.uwyo.edu/catalog/index.php
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The Neotectonic Map of Alaska (Plafker and others, 1994) represents the first comprehensive compilation of tectonic faults and folds in Alaska and outlines the relative activity of post-Oligocene structures. Commonly referred to as "the Plafker map", this publication is out of print and was used as baseline information for the creation of the Quaternary fault and fold database for Alaska (Koehler and others, 2012).
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Fault and fold features within the Howell, Wyoming 1:24,000 map. It is a digitized version of preliminary bedrock geology map series developed by the Wyoming Geological Survey. The information provides basic bedrock geologic information and features to include named and geologic map units based on the rock types present. STATEMAP product. This dataset is available for purchase through the WSGS, Digital Product MS-75. http://sales.wsgs.uwyo.edu/catalog/index.php


    map background search result map search result map Quaternary Fault and Fold Database of the United States Faults of the Howell 7.5' Quadrangle at 1:24,000 Faults of the Torrington 30' x 60' Quadrangle at 1:100,000 Detailed geologic mapping geodatabase for the Blue Ridge Parkway in Virginia with station point photographs Detailed geologic mapping geodatabase for the Blue Ridge Parkway in Virginia Map data and Unmanned Aircraft System imagery from the May 25, 2014 West Salt Creek rock avalanche in western Colorado Quaternary Faults and Folds (QFF) Quaternary faults and folds in Alaska: A digital database Top Mesozoic unconformity subcrop map, Cook Inlet basin, Alaska Geologic image from the Virginia Department of Mines, Minerals and Energy. UVA lantern slides Collection, LS_0438, Bath Co. Geologic image from the Virginia Department of Mines, Minerals and Energy. UVA lantern slides Collection, LS_0439, AK Geologic image from the Virginia Department of Mines, Minerals and Energy. UVA lantern slides Collection, LS_0508, PA Map data and Unmanned Aircraft System imagery from the May 25, 2014 West Salt Creek rock avalanche in western Colorado Faults of the Howell 7.5' Quadrangle at 1:24,000 Detailed geologic mapping geodatabase for the Blue Ridge Parkway in Virginia with station point photographs Detailed geologic mapping geodatabase for the Blue Ridge Parkway in Virginia Top Mesozoic unconformity subcrop map, Cook Inlet basin, Alaska Quaternary Fault and Fold Database of the United States Quaternary faults and folds in Alaska: A digital database Quaternary Faults and Folds (QFF)