This resource contains data on active faults in California that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). This resource is a compilation of Quaternary Active Fault features compiled by the USGS in cooperation with the California Geological Survey and accessed on July 11, 2012 by the AZGS. The Quaternary Fault and Fold Database for the Nation can be accessed online at http://earthquake.usgs.gov/qfaults/ through a user-friendly interface developed by the U.S. Geological Survey. This is part of the first nationwide compilation to provide up-to-date and comprehensive geologically based information on known or suspected active faults. The data are available as a Web feature service, a Web map service, an ESRI Service Endpoint, and an Excel workbook for the National Geothermal Data System. Each feature in an active fault dataset (record or row in the worksheet) is characterized by a unique combination of features, as well as being physically connected or inferred to be connected spatially in the Earth. For mapped active faults, the deformation style is assumed to be brittle (as opposed to ductile). The workbook contains 6 worksheets, including information about the template, instructions on using the template, notes related to revisions of the template, resource provider information, the data, a field list (data mapping view), and vocabularies (data valid terms) used to populate the spreadsheet. Fields in the data table include FeatureURI, Name, FullName, ParentFeatureURI, Label, Description, Symbol, OtherID, SpecificationURI, FeatureType, GeologicHistory, RepresentativeAgeURI, YoungerAgeURI, OlderAgeURI, IntervalSince Movement, Shape, ObservationMethod, PositionAccuracyMeters, PositionAccuracy, Displacement, SlipRate, SlipAccumulationInterval, MovementType, MovementSense, DipDirection, DateMostRecentEvent, RecurrenceInterval, TotalSlip, Source and MetadataURI.--NGDS

This report presents the geologic framework critical in understanding spring discharge and the hydrogeology in Black Canyon directly south of Lake Mead below Hoover Dam, Nevada and Arizona. Most of the springs are thermal 2 Geologic Framework of Thermal Springs, Black Canyon, Nevada and Arizona with temperatures as much as 45 degrees C. This study is part of a hydrogeologic and geochemical study of the Black Canyon thermal springs by the U.S. Geological Survey, funded by the National Park Service and National Cooperative Geologic Mapping Program of the U.S. Geological Survey. The study consisted of (1) compilation of existing geologic mapping, augmented by new field geologic mapping and geochronology (Felger and others, 2014), (2) collection and analysis of structural data adjacent to the springs of interest (appendix 1; Anderson and Beard, 2011; Beard and others, 2011a), and (3) construction of regional cross sections (pl. 1). The most significant results identify faults, fracture zones, and rock characteristics that influence the hydrogeology of Black Canyon. Additional results include refinement of the volcanic stratigraphy based on field mapping and new geochronology. This report will be integrated into a companion hydrogeologic report that includes new geochemical and spring flow data that describes groundwater components of Black Canyon thermal springs (M. Moran, written commun, 2013).

The study was designed to collect new surface geologic data in the southern Taos valley, and to synthesize surface and subsurface geologic and hydrogeologic data into geologic and hydrogeologic conceptual models. The study area is restricted to the Taos embayment, and specifically includes nonpueblo land in the northwest corner of the Ranchos de Taos quad and the southwest corner of the Taos quad. We have added small areas of the Taos SW and Los Cordovas quads in order to include relevant geologic features. Mapping was concentrated on the high piedmont terrain within the embayment. The primary objectives of the study are: (1) To develop a geometric model of the surface and subsurface geology of the Taos embayment. This model will assist in locating areas for drilling exploratory water wells, and in locating critical areas for hydrologic monitoring. (2) To better understand the detailed basin-margin hydrogeology in the rapidly developing high piedmont area between Cañon and Talpa. This understanding will assist planners and developers in making decisions concerning water supply and water quality, and support geologists and drillers in developing domestic water supplies. (3) To investigate the influence of stratigraphy and structure on mountain-front recharge, and determine what recharge mechanisms are active at various locations. (4) To evaluate existing data resources and recommend directions of future data collection. Such an evaluation will assist agencies in making decisions about future water studies in the Taos area. The following deliverables are included in this report: geologic maps at scales of 1:12,000 and 1:6000, six geologic cross sections and block diagrams, a tectonic/geologic/geophysical map (1:24,000 scale) and preliminary model, a potentiometric surface map (1:12,000 scale) of the basin margin along the southern Taos embayment, and evaluation of mountain-front recharge mechanisms and routes of recharge. These data and interpretations are synthesized into a conceptual geologic and hydrogeologic models. In addition, we provide a discussion of areas for future ground water development and monitoring.

This package includes the final technical report for the Play-Fairway project in Washington State. It includes all activities and reporting from phases 1, 2, and 3. The primary goal of this study is to develop a suite of tools and methods that help identify a ?fairway? where the three main aspects of a functioning geothermal system are most likely to be found and particularly focuses on developing these tools for use in an actively deforming magmatic arc where heat is associated with volcanic centers and permeability is provided by a network of suitably stressed active faults.

This dataset is a compilation of fault (shear displacement) features throughout West Virginia, provided by the West Virginia Geological and Economic Survey (WVGES), published as a web feature service, a web map service, an ESRI service and an Excel workbook.The workbook contains 16 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 various sheets indicating valid terms and URIs for this information exchange. For mapped active faults, which are the scope of this scheme, the deformation style is assumed to be brittle (as opposed to ductile). For more info about this resource please see the links provided (shapefiles and metadata URLs). This resource was provided by the West Virginia Geological and Economic Survey and made available for distribution through the National Geothermal Data System. --NGDS