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1. Assessment and Management of Dead-Wood Habitat [USGS_OFR_2007_1054]
Dead wood has become an increasingly important conservation issue in managed forests, as awareness of its function in providing wildlife habitat and in basic ecological processes has dramatically ...


2. Assessment of Hazards Associated with the Bluegill Landslide, South-Central Idaho [USGS_OFR_2004_1054]
The Bluegill landslide, located in south-central Idaho, is part of a larger landslide complex that forms an area in the Salmon Falls Creek drainage named Sinking Canyon. The landslide is on public ...


3. Baseline Characteristics of Jordan Creek, Juneau, Alaska [USGS_OFR_2004_1220]
Anadromous fish populations historically have found healthy habitat in Jordan Creek, Juneau, Alaska. Concern regarding potential degradation to the habitat by urban development within the Mendenhall ...


4. Baseline and Historic Depositional Rates and Lead Concentrations, Floodplain Sediments, Lower Coeur d'Alene River, Idaho [USGS_OFR_2004_1211]
Lead-rich sediments, containing at least 1000 ppm of lead (Pb), and derived mainly from discarded mill tailings in the Coeur d'Alene mining region, cover about 60 km2 of the 80-km2 floor of the main ...


5. Bathymetry and selected perspective views of 6 reef and coastal areas in Northern Lake Michigan [USGS_OFR_2003_120]
Bathymetry and selected perspective views of 6 reef and coastal areas in Northern Lake Michigan involves applying state of the art laser technology and derivative imagery to map the detailed morphology ...


6. Bathymetry, Substrate and Circulation in Westcott Bay, San Juan Islands, Washington [USGS_OFR_2007_1305]
Nearshore bathymetry, substrate type, and circulation patterns in Westcott Bay, San Juan Islands, Washington, were mapped using two acoustic sonar systems, video and direct sampling of seafloor sediments. ...


7. Bedrock Geologic Map of the Port Wing, Solon Springs, and parts of the Duluth and Sandstone 30' X 60' Quadrangles, Wisconsin [USGS_OFR_2004_1303]
This Open-File Report provides digital data (shapefiles and .e00 files) for the bedrock geology in the Port Wing, Solon Springs, and parts of the Duluth and Sandstone quadrangles in Wisconsin. A ...


8. Bedrock Geology and Mineral Resources of the Knoxville 1 degree x 2 degree Quadrangle, Tennessee, North Carolina, and South Carolina (Digital Version) [USGS_OFR_2004_1075]
The following geographic information system (GIS) data layers provide a digital format for the map plate in Bulletin 1979 (Robinson et al., 1991), Bedrock Geology and Mineral Resources of the Knoxville ...


9. Binational Digital Soils Map of the Ambos Nogales Watershed, Southern Arizona and Northern Sonora, Mexico [USGS_OFR_2004_1335]
A digital map of soil parameters for the international Ambos Nogales watershed was prepared to use as input for selected soils-erosion models. The Ambos Nogales watershed in southern Arizona and ...


10. Molokai Benthic Habitat Mapping [USGS_OFR_2005_1070]
The detailed high-resolution map layer provided here documents habitat characterization of a critical coral reef in Hawai'i. Integration of the aerial imagery, SHOALS bathymetry, and field observations ...


11. Pliocene palynomorph censusdata from the Pinecrest Beds (Tamiami Formation) in Quality Aggregates Phase 6 pit, Southwestern Florida [USGS-OFR-93-563]
The USGS Open-File Report 92-712 data set (Pliocene palynomorph census data from the Pinecrest Beds (Tamiami Formation) in Quality Aggregates Phase 6 pit, Southwestern Florida) is a digital version ...


12. Porphyry Copper Deposits of the World: Database, Map, and Grade and Tonnage Models [USGS_OFR_2005_1060]
Mineral deposit models are important in exploration planning and quantitative resource assessments for two reasons: (1) grades and tonnages among deposit types are significantly different, and (2) ...


13. Potentiometric Surface of the Upper Floridan Aquifer in the Coastal Area of Georgia, September 2000 [USGS_OFR_2005_1030]
The Upper Floridan aquifer is part of the Floridan aquifer system that underlies most of the Coastal Plain of Georgia, southern South Carolina, extreme southeastern Alabama, and all of Florida (Miller, ...


14. Potentiometric Surface of the Upper Floridan Aquifer in the Ichetucknee Springshed and Vicinity, Northern Florida, September 2003 [USGS_OFR_2006_1031]
The Upper Floridan aquifer is a highly permeable unit of carbonate rock extending beneath most of Florida and parts of southern Alabama, Georgia, and South Carolina. The high permeability is due in ...


15. Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, May 2007 [USGS_OFR_2007_1371]
This map depicts the potentiometric surface of the Upper Floridan aquifer in the St. Johns River Water Management District and vicinity for May 2007. Potentiometric contours are based on water-level ...


16. Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, May 2006 [USGS_OFR_2007_1032]
The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida ...


17. Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, September 2007 [USGS_OFR_2008_1105]
The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida ...


18. Predicted Seafloor Facies of Central Santa Monica Bay, California [USGS_OFR_2004_1081]
Mapping surficial seafloor facies (sand, silt, muddy sand, rock, etc.) should be the first step in marine geological studies and is crucial when modeling sediment processes, pollution transport, deciphering ...


19. Preliminary Assessment of Volcanic and Hydrothermal Hazards in Yellowstone National Park and Vicinity [USGS_OFR_2007_1071]
Possible future violent events in the active hydrothermal, magmatic, and tectonic system of Yellowstone National Park pose potential hazards to park visitors and infrastructure. Most of the national ...


20. Preliminary Geologic Map of Bainbridge Island, Washington [USGS_OFR_2005_1387]
Bainbridge Island is in the center of the Puget Lowland, Washington, surrounded by the waters of Puget Sound. Winslow, the commercial center of the island, is a 35-minute ferry ride from Seattle. ...


21. Preliminary Geologic Map of Kanaga Volcano, Alaska [USGS_OFR_2003_113]
Kanag a Volcano is a 1,300 m (4,287-foot) high, historically active cone-shaped stratovolcano located on the north end of Kanaga Island in the Andreanof Islands Group of the Aleutian Islands. The ...


22. Preliminary Geologic Map of Southernmost Texas, United States, and parts of Tamaulipas and Nuevo Leon, Mexico [USGS_OFR_2005_1409]
The geologic map covers the southernmost part of Texas (parts of Jim Hogg, Brooks, Starr, Hidalgo, Zapata, Willacy, Kenedy, and Cameron Counties), and parts of Nuevo Leon and Tamaulipas, Mexico. Geologic ...


23. Preliminary Geologic Map of the Elsinore 7.5 - Quadrangle, Riverside County, California [USGS_OFR_2003_281]
Geologic Map of the Elsinore 7.5? Quadrangle, Riverside County, California ontains a digital geologic map database of the Elsinore 7.5 - quadrangle, Riverside County, California that includes: 1. ...


24. Preliminary Geologic Map of the Los Angeles 30' x 60' Quadrangle, Southern California [USGS_OFR_2005_1019]
The Los Angeles 30' x 60' quadrangle covers approximately 5,000 km2 including much of the densely populated urban and suburban areas of the southern California megalopolis. The quadrangle is about ...


25. Preliminary Geologic Map of the Northwestern Part of the Alamosa 30 X 60 Minute Quadrangle, Alamosa and Conejos Counties, Colorado [USGS_OFR_2005_1392]
This digital geologic map presents new polygon (geologic map unit contacts) and line (terrace and lacustrine spit/barrier bar) vector data for a map comprised of four 7.5-minute quadrangles in the ...


26. Preliminary Geologic Map of the Perris 7.5? Quadrangle, Riverside County, California [USGS_OFR_2003_270]
The Geologic Map of the Perris 7.5? Quadrangle, Riverside County, California contains a digital geologic map database of the Perris 7.5? quadrangle, Riverside County, California that includes: 1. ...


27. Preliminary Geologic Map of the Townsend 30' x 60' Quadrangle, Montana [USGS_OFR_2006_1138]
The geologic map of the Townsend quadrangle, scale 1:100,000, was made as part of the Montana Investigations Project to provide new information on the stratigraphy, structure, and geologic history ...


28. Preliminary Geologic Map of the White Sulphur Springs 30' x 60' Quadrangle, Montana [USGS_OFR_2006_1329]
The geologic map of the White Sulphur Springs Quadrangle, scale 1:100,000, was made as part of the Montana Investigations Project to provide new information on the stratigraphy, structure and geologic ...


29. Preliminary Integrated Geologic Map Databases for the United States -Kodiak Islands, Alaska [USGS_OFR_2005_1340]
The 1:500,000-scale reconnaissance geologic map of the Kodiak Islands, Alaska covers more than 4,800 square miles (12,500 square kilometers) of south central Alaska. The Kodiak Islands are located ...


30. Preliminary Isostatic Gravity Map of Joshua Tree National Park and Vicinity, Southern California [USGS_OFR_2007_1218]
This isostatic residual gravity map is part of an effort to map the three-dimensional distribution of rocks in Joshua Tree National Park, southern California. This map will serve as a basis for modeling ...


31. Preliminary Physical Stratigraphy and Geophysical Data of the USGS Hope Plantation Core (BE-110), Bertie County, North Carolina [USGS_OFR_2007_1251]
In March and April, 2004, the U.S. Geological Survey (USGS), in cooperation with the North Carolina Geological Survey (NCGS) and the Raleigh Water Resources Discipline (WRD), drilled a stratigraphic ...


32. Preliminary Surficial Geologic Map of a Calico Mountains Piedmont and Part of Coyote Lake, Mojave Desert, San Bernardino County, California [USGS_OFR_2006_1090]
This 1:24,000 scale detailed surficial geologic map and digital database of a Calico Mountains piedmont and part of Coyote Lake in south-central California depicts surficial deposits and generalized ...


33. Principal Facts of Gravity data in the Northern Willamette Valley and Vicinity, Northwestern Oregon and Southwestern Washington [USGS_OFR_2007_1058]
Gravity data were collected from 2004 through 2006 to assist in mapping subsurface geology in the northern Willamette Valley and vicinity, northwestern Oregon and southwestern Washington. Prior to ...


34. Processed 1938 Aerial Photography for Selected Areas of the Lower Colorado River, Southwestern United States [USGS_OFR_2006_1141]
The U.S. Geological Survey (USGS) initiated a study of the Lower Colorado River to derive temporal-change characteristics from the predam period to the present. In this report, we present summary ...


35. Quantitative X-ray Diffraction Mineralogy of Los Angeles Basin Core Samples [USGS_OFR_2006_1036]
This report contains X-ray diffraction (XRD) analysis of mineralogy for 81 sediment samples from cores taken from three drill holes in the Los Angeles Basin in 2000-2001. We analyzed 26 samples from ...


36. Quaternary Stratigraphy and Tectonics, and Late Prehistoric Agriculture of the Safford Basin (Gila and San Simon River Valleys), Graham County, Arizona [USGS_OFR_2004_1062]
This guidebook accompanied the 46th annual meeting of the Rocky Mountain Cell of the Friends of the Pleistocene (FOP) and the 2002 Fall Field Trip of the Arizona Geological Society. The meeting and ...


37. Quaternary Stratigraphy, Drainage-Basin Development, and Geomorphology of the Lake Manix Basin, Mojave Desert [USGS_OFR_2007_1281]
The 2007 field trip of the Pacific Cell, Friends of the Pleistocene, visited features of the Quaternary geology and geomorphology of the Lake Manix basin in the Mojave Desert. This report is the guidebook ...


38. Regional Geochemical Results from the Analyses of Rock, Soil, and Vegetation Samples-Big Delta B-2 Quadrangle, Alaska [USGS_OFR_2005_1431]
The USGS reports the chemical analyses for rocks, soil, soil water, and vegetation, collected from throughout the Big Delta B-2 quadrangle in east-central Alaska, for the period 1998-2002. This study ...


39. Modeling Soil Moisture in the Mojave Desert [USGS_OFR_2008_1100]
This publication describes soil moisture modeling in the Mojave Desert. It provides a general background on the process of pedogenesis, or soil development, which is a major factor affecting soil ...


40. Modeling of the Climax Stock and Related Plutons Based on the Inversion of Magnetic data, Southwest Nevada [USGS_OFR_2004_1345]
The raster grid, model1, represents the elevation of the surface of the Climax and Gold Meadows Stocks. The elevation was generated by inverse modeling of the pseudogravity anomaly. This raster ...


41. Modeling the Spatial and Temporal Variation of Monthly and Seasonal Precipitation on the Nevada Test Site and Vicinity, 1960-2006 [USGS_OFR_2007_1269]
The Nevada Test Site (NTS), located in the climatic transition zone between the Mojave and Great Basin Deserts, has a network of precipitation gages that is unusually dense for this region. This network ...


42. Modified Mercalli Intensity Maps for the 1868 Hayward Earthquake Plotted in ShakeMap Format [USGS_OFR_2008_1121]
This data set provides Modified Mercalli Intensity maps for the Hayward earthquake of October 21, 1868. To construct the Modified Mercalli Intensity (MMI) ShakeMap for the 1868 Hayward earthquake, ...


43. Modified Mercalli Intensity Maps for the 1906 San Francisco Earthquake Plotted in ShakeMap Format [USGS_OFR_2005_1135]   PARENT METADATA
This website presents Modified Mercalli Intensity maps for the great San Francisco earthquake of April 18, 1906. These new maps combine two important developments. First, we have re-evaluated and ...


44. National Assessment of Shoreline Change Part 4: Historical Coastal Cliff Retreat along the California Coast [USGS_OFR_2007_1133]
Coastal cliff retreat, the landward migration of the cliff face, is a chronic problem along many rocky coastlines in the United States. As coastal populations continue to grow and community infrastructures ...


45. National Geochronological Database [USGS_OFR_2003_236]
The National Geochronological Data Base (NGDB) was established by the United States Geological Survey (USGS) to collect and organize published isotopic (also known as radiometric) ages of rocks in ...


46. Nutrient Concentrations in Upper and Lower Echo, Fallen Leaf, Spooner, and Marlette Lakes and Associated Outlet Streams, California and Nevada, 2002-03 [USGS_OFR_2004_1333]
Five lakes and their outlet streams in the Lake Tahoe Basin were sampled for nutrients during 2002-03. The lakes and streams sampled included Upper Echo, Lower Echo, Fallen Leaf, Spooner, and Marlette ...


47. Petroleum System Modeling of the Western Canada Sedimentary Basin - Isopach Grid Files [USGS_OFR_2005_1421]
A 3-D geologic/petroleum system model of the Western Canada Sedimentary Basin (WCSB) was created by using elevations on the top of the Lower Cretaceous Mannville Group as a reference horizon for stacking ...


48. Radiocarbon Dating of Cores Collected from Bear Lake, Utah and Idaho [USGS_OFR_2005_1320]
The overall goal of our research on Bear Lake is to obtain records of past climate change for the region, including changes in precipitation (rain and snow) patterns during the last 10,000 years and ...


49. Radiometric Survey in Western Afghanistan: A Website for Distribution of Data [USGS_OFR_2007_1042]
Radiometric (uranium content, thorium content, potassium content, and gamma-ray intensity) and related data were digitized from radiometric and survey route location maps of western Afghanistan published ...


50. Radon in Soils of Parts of Cameron, Hidalgo, and Willacy Counties, Texas [USGS_OFR_2005_1423]
This study looks at part of the southern Rio Grande Valley where all of the counties are ranked by USEPA as zone 3. The study area (see index map) includes parts of Cameron, Hidalgo, and Willacy Counites ...


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