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51. Raster dataset showing the probability of detecting atrazine/desethyl-atrazine in ground water in Colorado, hydrogeomorphic regions and atrazine use estimates included. [USGS_atra_hyd_use]
This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product of atrazine) in ground ...


52. Raster dataset showing the probability of detecting atrazine/desethyl-atrazine in ground water in Colorado, hydrogeomorphic regions included and atrazine use estimates not included [USGS_atra_hyd_nuse]
This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product of atrazine) in ground ...


53. Regional Geochemical Results from the Reanalysis of NURE Stream Sediment Samples - Eagle 3 Degree Quadrangle, East-Central Alaska [USGS_OFR_2007_1075]
This report presents reconnaissance geochemical data for a cooperative study in the Fortymile Mining District, east-central Alaska, initiated in 1997. This study has been funded by the U.S. Geological ...


54. Results of Electrical Resistivity Data Collected near the Town of Guernsey, Platte County, Wyoming [USGS_OFR_2004_1095]
As part of a study to investigate subsurface geologic conditions as they relate to ground-water flow in an abandoned landfill near the town of Guernsey, Wyoming, geophysical direct current (DC) resistivity ...


55. Rock-Fall Hazard Assessment of Little Mill Campground, American Fork Canyon, Uinta National Forest, Utah [USGS_OFR_2005_1229]
In July 2004, at the request of Pam Gardner, District Ranger for the Pleasant Grove District of the Uinta National Forest, Ed Harp of the U.S. Geological Survey (USGS) conducted a preliminary assessment ...


56. Rocky Mountain Snowpack Chemistry at Selected Sites, 1993-2010 [USGS_CO53100]
Rocky Mountain Regional Snowpack Chemistry Monitoring Study Area: High-elevation sites near the Continental Divide in Montana, Wyoming, Idaho, Colorado, New Mexico, and Utah, 1993 to present Study ...


57. Rocky Mountain Snowpack Chemistry at Selected Sites, 2002 [USGS_OFR_2004_1027]
During spring 2002, the chemical composition of annual snowpacks in the Rocky Mountain region of the Western United States was analyzed. Snow samples were collected at 75 geographically distributed ...


58. Sediment Deposition and Erosion in South San Francisco Bay, California from 1956 to 2005 [USGS_OFR_2006_1287]
Sediment deposition and erosion in South San Francisco Bay from 1956 to 2005 was studied by comparing bathymetric surveys made in 1956, 1983, and 2005. From 1956 to 1983, the region was erosional. ...


59. Sedimentary Fabrics of Stratified Slope Deposits at a Site near Hoover's Camp, Shenandoah National Park, Virginia [USGS_OFR_2004-1059]
An outcrop of stratified slope deposits in Shenandoah National Park is described in detail. The Pleistocene age deposits are comprised of a mixture of clay to cobbles defining a series of offlapping ...


60. Seismic Constraints and Coulomb Stress Changes of a Blind Thrust Fault System, 1: Coalinga and Kettleman Hills, California [USGS_OFR_2006_1149]
This report reviews the seismicity and surface ruptures associated with the 1982-1985 earthquake sequence in the Coalinga region in California, and the role of Coulomb stress in triggering the mainshock ...


61. Seismic Hazard Maps for Seattle, Washington, Incorporating 3D Sedimentary Basin Effects, Nonlinear Site Response, and Rupture Directivity [USGS_OFR_2007_1175]
This report presents probabilistic seismic hazard maps for Seattle, Washington, based on over 500 3D simulations of ground motions from scenario earthquakes. These maps include 3D sedimentary basin ...


62. Seismic Shear Wave Reflection Imaging at the Former Fort Ord, Monterey, California [USGS_OFR_2007_1068]
At the former Fort Ord in Monterey County, California, contamination threatens an aquifer that provides drinking water for local communities. Assessment and remediation require accurate hydrological ...


63. Seismotectonic Map of Afghanistan [USGS_OFR_2005_1264]
A seismotectonic map shows geologic, seismological, and other information that is pertinent to seismic hazards but previously was scattered among many sources. Afghanistan is part of the Eurasian ...


64. Seismotectonic Map of Afghanistan and Adjacent Areas [USGS_OFR_2007_1104]
This map is intended to be part of an assessment of Afghanistan's geology, natural resources, and natural hazards. One of the natural hazards is from earthquake shaking. One of the tools required ...


65. Selected Field Parameters from Streams and Analytical Data from Water and Macroinvertebrate Samples, Central Colorado Assessment Project, Environmental Assessment Task, 2004 and 2005 [USGS_OFR_2007_1044]
The U.S. Geological Survey (USGS) Central Colorado Assessment Project (CCAP) began in October 2003 and is planned to last through September 2008. One major goal of this project is to compare the relationships ...


66. Selenium Concentrations in Irrigation Drain Inflows to the Salton Sea, California, October 2006 and January 2007 [USGS_OFR_2007_1113]
This report presents raw data on selenium concentrations in samples of water, sediment, detritus, and selected food-chain matrices collected from selected agricultural drains in the southern portion ...


67. Seven Aeromagnetic Surveys in California and Nevada: A Web Site for Distribution of Data [USGS_OFR_2005_1328]
This web site contains digital data files and descriptions of aeromagnetic data collected in California and Nevada through contracts for the U.S. Geological Survey between 1996 and 2002. The survey ...


68. Shaded Relief Map of the San Francisco Bay Region, California [USGS_OFR_97_745_B]
This report is a digital database package containing both plotfiles and Geographic Information Systems (GIS) databases of shaded relief maps of the San Francisco Bay Region. The data are provided ...


69. Shear Wave Structure of Umbria and Marche, Italy, Strong Motion Seismometer Sites Affected by the 1997-98 Umbria-Marche, Italy, Earthquake Sequence [USGS_OFR_2008_1010]
A long sequence of earthquakes, eight with magnitudes between 5 and 6, struck the Umbria and Marche regions of central Italy between September 26, 1997 and July 1998. The earthquake swarm caused severe ...


70. Sidescan Sonar Imagery and Surficial Geologic Interpretation of the Sea Floor off Branford, Connecticut [USGS_OFR_2004_1003]
The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Connecticut Department of Environmental Protection (CT DEP), has produced ...


71. Soil Data from Picea mariana Stands near Delta Junction, Alaska of Different Ages and Soil Drainage Type [USGS_OFR_2004_1271]
The U.S. Geological Survey project Fate of Carbon in Alaskan Landscapes (FOCAL) is studying the effect of fire and soil drainage on soil carbon storage in the boreal forest. This project has selected ...


72. Soil Data from a Fire Chronosequence near Thompson, Manitoba, Canada [USGS_OFR_2006_1291]
The U.S. Geological Survey project Fate of Carbon in Alaskan Landscapes (FOCAL) is studying the effect of fire and soil drainage on soil carbon storage in the boreal forest. As such this group was ...


73. South Texas Coastal Classification Maps - Mansfield Channel to the Rio Grande [USGS_OFR_2006_1133]
The primary purpose of the USGS National Assessment of Coastal Change Project is to provide accurate representations of pre-storm ground conditions for areas that are designated high priority because ...


74. Southeastern Louisiana Coastal Classification Maps - Pass Abel to East Timbalier Island [USGS_OFR_2005_1003]
This data set describes a Coastal Classification Map that extends from Pass Abel to East Timbalier Island. One purpose of the USGS National Assessment of Coastal Change Project is to provide accurate ...


75. Spatial Digital Database for the Geologic Map of Nevada [USGS_OFR_2003_66]
This report publishes a geologic digital spatial database (nvgeo) representing the geologic map of Nevada (Stewart and Carlson, 1978a). The original paper map was printed as a single sheet at a scale ...


76. Spatial Digital Database for the Geologic Map of Oregon [USGS_OFR_2003_67]
This report describes and makes available a geologic digital spatial database (orgeo) representing the geologic map of Oregon (Walker and MacLeod, 1991). The original paper publication was printed ...


77. Spatial Trends in Ash Yield, Sulfur, Selenium, and Other Selected Trace Element Concentrations in Coal Beds of the Appalachian Plateau Region, U.S.A. [USGS_OFR_2005_1330]
Land disturbances sometimes contribute to relative increases in deleterious substances in streams. Acid drainage in response to coal mining in certain regions of the Appalachian Plateau is one well ...


78. Spatial databases of the Humboldt Basin mineral resource assessment, northern Nevada [USGS_OFR_2004_1245]
This report describes the origin, generation, and format of tract map databases for deposit types that accompany the metallic mineral resource assessment for the Humboldt River Basin, northern Nevada. ...


79. Stratigraphy of Lacustrine Sediments Cored in 1996, Bear Lake, Utah and Idaho [USGS_OFR_2005_1288]
The overall goal of our research on Bear Lake is to create records of past climate change for the region, including changes in precipitation (rain and snow) patterns during the last 10,000 years and ...


80. Streamflow and Nutrient Fluxes of the Mississippi-Atchafalaya River Basin and Subbasins for the Period of Record Through 2005 [USGS_OFR_2007_1080]
The U.S. Geological Survey has monitored streamflow and water quality systematically in the Mississippi-Atchafalaya River Basin (MARB) for more than five decades. This report provides streamflow and ...


81. Sulfur Dioxide Emission Rates from Kilauea Volcano, Hawaii, an Update: 2002-2006 [USGS_OFR_2007_1114]
Sulfur dioxide (SO2) emission rates from K+lauea Volcano were first measured by Stoiber and Malone (1975) and have been measured on a regular basis since 1979 (Greenland and others, 1985; Casadevall ...


82. Summary Distribution of Slides and Earth Flows in the San Francisco Bay Region, California [USGS_OFR_97_745_C]
This report is a digital database package containing both plotfiles and Geographic Information Systems (GIS) databases of maps of slides and earth flows in the San Francisco Bay Region. The data are ...


83. Summary of Suspended-Sediment Concentration Data, San Francisco Bay, California, Water Year 2002 [USGS_OFR_2004_1219]
Suspended-sediment concentration data were collected in San Francisco Bay during water year 2002 (October 1, 2001-September 30, 2002). Optical backscatterance sensors and water samples were used to ...


84. Surface- and Ground-Water Monitoring and Mapping of Selected Features at the Blue Ridge Parkway Mt. Pisgah Campground, Haywood County, North Carolina, 2002 [USGS_OFR_2004_1073]
During 2002, a baseline study of hydrologic conditions was conducted, and selected features were mapped within the Mt. Pisgah campground on the Blue Ridge Parkway in Haywood County, North Carolina. ...


85. Surficial Geology Along The Spokane River, Washington And Its Relationship To The Metal Content of Sediments [USGS_OFR_2002_126]
The purpose of this study is (1) to document the geographic distribution of Holocene (deposited in the last 11,000 years) sedimentary lithologies in and along the Spokane River, (2) to document the ...


86. Surficial Geology and Analysis of Post-Impoundment Sediment of Lake Mohave; Interpretation of Sidescan Sonar and Seismic-Reflection Data [USGS_OFR_2004_1256]
Lake Mohave is one of several multi-purpose reservoirs that have been constructed on the Colorado River. The lake was formed upon completion of the Davis Dam in 1953. Since then, research on this ...


87. Surficial Sediment Data from the Gulf of Maine, Georges Bank, and Vicinity: A GIS Compilation [USGS_OFR_2003_001]
The Coastal and Marine Geology Program of the U.S. Geological Survey, in cooperation with the University of Maine, University of New Hampshire, Boston University, and Bigelow Laboratory for Ocean ...


88. Swath Bathymetric Survey of Englebright Lake, Yuba-Nevada Counties, California [USGS_OFR_2006_1346]
Swath bathymetric data of upper Englebright Lake, Yuba-Nevada Counties, California are presented. These data consist of registered 1-meter cells and a water depth for the cell. Precision and accuracy ...


89. Terrestrial LIDAR Investigation of the December 2003 and January 2007 Activations of the Northridge Bluff Landslide, Daly City, California [USGS_OFR_2007_1079]
On December 20, 2003 and again on January 1, 2007, landslides occurred along the coastal bluff that forms the west boundary of Daly City, California sending debris as far as 290 meters downhill and ...


90. The Cottage Lake Aeromagnetic Lineament: A Possible Onshore Extension of the Southern Whidbey Island Fault, Washington [USGS_OFR_2004_1204]
The northwest-striking southern Whidbey Island fault zone (SWIF) was mapped previously using borehole data and potential-field anomalies on Whidbey Island and marine seismic surveys beneath surrounding ...


91. The Distribution of Submersed Aquatic Vegetation in the Fresh and Oligohaline Tidal Potomac River, 2004 [USGS_OFR_2007_1198]
Submersed aquatic vegetation (SAV) is a critical component of the Potomac River ecosystem. Though SAV provides important habitat for fauna and stabilizes bottom sediment, very dense beds may restrict ...


92. The Gulf of the Farallones: Sidescan-Sonar Imagery [USGS_OFR_2004_1082]
In 1989, the U.S. Geological Survey (USGS) began a major geologic and oceanographic investigation of the Gulf of the Farallones National Marine Sanctuary continental shelf system, designed to evaluate ...


93. The National Assessment of Shoreline Change: A GIS Compilation of Vector Cliff Edges and Associated Cliff Erosion Data for the California Coast [USGS_OFR_2007_1112]
Introduction: The U.S. Geological Survey has generated a comprehensive data clearinghouse of digital vector cliff edges and associated rates of cliff retreat along the open-ocean California coast. ...


94. The National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the U.S. Gulf of Mexico [USGS_OFR_2004_1089]
The Coastal and Marine Geology Program of the U.S. Geological Survey has generated a comprehensive database of digital vector shorelines and shoreline change rates for the U.S. Gulf of Mexico. These ...


95. The National Geochemical Survey - Database and Documentation [USGS_OFR_2004_1001]
The USGS, in collaboration with other federal and state government agencies, industry, and academia, is conducting the National Geochemical Survey (NGS) to produce a body of geochemical ...


96. Topobathymetric Data for Tampa Bay, Florida [USGS_OFR_2007_1051]
Topobathymetric data (a "topobathy") are a merged rendering of both topography (land elevation) and bathymetry (water depth) to provide a single product useful for inundation mapping and a variety ...


97. Topographic Slope as a Proxy for Seismic Site-Conditions and Amplification Around the Globe [USGS_OFR_2007_1357]
It is well-known that large global earthquakes can have a dramatic effect on local communities and the built environment. Moreover, ground motions amplified by surficial materials can exacerbate the ...


98. Total Dissolved Gas and Water Temperature in the Lower Columbia River, Oregon and Washington, 2007: Quality-Assurance Data and Comparison to Water-Quality Standards [USGS_OFR_2007_1408]
When water is released through the spillways of dams, air is entrained in the water, increasing the downstream concentration of dissolved gases. Excess dissolved-gas concentrations can have adverse ...


99. Two-Dimensional Magnetotelluric Model of Deep Resistivity Structure in the Bodie-Aurora District of California [USGS_OFR_2006_1060]
Magnetotelluric data were acquired during October 2001 by the U.S. Geological Survey (USGS) as part of a study to examine the structural nature of basins in the transition zone between the Sierra ...


100. USGS environmental characterization of flood sediments left in the New Orleans area after Hurricanes Katrina and Rita, 2005 [USGS_OFR_2006_1023]
The flooding in the greater New Orleans area that resulted from Hurricanes Katrina and Rita in September, 2005, left behind accumulations of sediments up to many centimeters thick on streets, lawns, ...


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