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51. Catalog of Mount St. Helens 2004-2007 Dome Samples with Major- and Trace-element Chemistry [USGS_OFR_2008_1130]
Sampling and analysis of eruptive products at Mount St. Helens is an integral part of volcano monitoring efforts conducted by the U.S. Geological Survey's Cascades Volcano Observatory (CVO). The objective ...


52. Geochemical Data for Samples Collected in 2007 Near the Concealed Pebble Porphyry Cu-Au-Mo Deposit, Southwest Alaska [USGS_OFR_2008_1132]
In the summer of 2007, the U.S. Geological Survey (USGS) began an exploration geochemical research study over the Pebble porphyry copper-gold-molydenum (Cu-Au-Mo) deposit in southwest Alaska. The ...


53. Geochemistry of Rock Samples Collected from the Iron Hill Carbonatite Complex, Gunnison County, Colorado [USGS_OFR_2008_1119]
A study conducted in 2006 by the U.S. Geological Survey collected 57 surface rock samples from nine types of intrusive rock in the Iron Hill carbonatite complex. This intrusive complex, located in ...


54. 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 ...


55. 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, ...


56. 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 ...


57. Magnetotelluric Data, San Luis Valley, Colorado [USGS_OFR_2007_1405]
The San Luis Valley region population is growing. Water shortfalls could have serious consequences. Future growth and land management in the region depend on accurate assessment and protection of ...


58. Geomorphic Map of Worcester County, Maryland, Interpreted from a LIDAR-Based, Digital Elevation Model [USGS_OFR_2008_1005]
A recently compiled mosaic of a LIDAR-based digital elevation model (DEM) is presented with geomorphic analysis of new macro-topographic details. The geologic framework of the surficial and near surface ...


59. Ground-Water Quality in the Mohawk River Basin, New York, 2006 [USGS_OFR_2008_1086]
Water samples were collected from 27 wells from August through November 2006 to characterize ground-water quality in the Mohawk River Basin. The Mohawk River Basin covers 3,500 square miles in central ...


60. Interior River Lowland Ecoregion Summary Report [USGS_OFR_2008_1088]
The Interior River Lowlands ecoregion encompasses 93,200 square kilometers (km2) across southern and western Illinois, southwest Indiana, east-central Missouri, and fractions of northwest Kentucky ...


61. Climate Variation at Flagstaff, Arizona 1950 to 2007 [USGS_OFR_2007_1410]
Flagstaff is becoming warmer and drier. Estimated average-daily temperatures of the Flagstaff area are 2.3-degrees warmer since 1970 and annual precipitation at Flagstaff has been below average for ...


62. Concentrations of Metals in Aquatic Invertebrates from the Ozark National Scenic Riverways, Missouri [USGS_OFR_2007_1435]
This report summarizes the findings of a study conducted as a pilot for part of a park-wide monitoring program being developed for the Ozark National Scenic Riverways (ONSR) of southeastern Missouri. ...


63. 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 ...


64. Changes in Streamflow, Concentrations, and Loads in Selected Nontidal Basins in the Chesapeake Bay Watershed, 1985-2006 [USGS_OFR_2007_1372]
Water-quality and streamflow data from 34 sites in nontidal parts of the Chesapeake Bay watershed are presented to document annual nutrient and sediment loads and trends for 1985 through 2006, as ...


65. Long-term and Storm-related Shoreline Change Trends in the Florida Gulf Islands National Seashore [USGS_OFR_2007_1392]
Coastal erosion on Northern Gulf of Mexico barrier islands is an ongoing issue that was exacerbated by the storm seasons of 2004 and 2005 when several hurricanes made landfall in the Gulf of Mexico. ...


66. Data from Theodolite Measurements of Creep Rates on San Francisco Bay Region Faults, California: 1979-2007 [USGS_OFR_2007_1367]
The purpose is to update with six additional years of data, our creep data archive on San Francisco Bay region active faults for use by the scientific research community. Earlier data (1979-2001) ...


67. 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 ...


68. Water Velocity and Suspended Solids Measurements by In-situ Instruments in Upper Klamath Lake, Oregon [USGS_OFR_2007_1279]
The U. S. Geological Survey conducted hydrodynamic measurements in Upper Klamath Lake during four summer seasons (approximately mid-June to mid-September) during 2003 to 2006. Measurements included ...


69. 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. ...


70. Development of a Land Use Database for the Little Blackwater Watershed, Dorchester County, Maryland [USGS_OFR_2007_1309]
Many agricultural and forested areas in proximity to National Wildlife Refuges (NWR) are under increasing economic pressure to develop lands for commercial or residential development. The upper portion ...


71. Gravity Data from Newark Valley, White Pine County, Nevada [USGS_OFR_2007_1306]
The Newark Valley area, eastern Nevada is one of thirteen major ground-water basins investigated by the BARCAS (Basin and Range Carbonate Aquifer Study) Project. Gravity data are being used to help ...


72. 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 ...


73. High-Resolution Topographic, Bathymetric, and Oceanographic Data for the Pleasure Point Area, Santa Cruz County, California: 2005-2007 [USGS_OFR_2007_1270]
The County of Santa Cruz Department of Public Works and the County of Santa Cruz Redevelopment Agency requested the U.S. Geological Survey (USGS) Western Coastal and Marine Geology Team (WCMG) to ...


74. 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 ...


75. 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 ...


76. Coastal Processes Study at Ocean Beach, San Francisco, CA: Summary of Data Collection 2004-2006 [USGS_OFR_2007_1217]
Ocean Beach in San Francisco, California, contains a persistent erosional section in the shadow of the San Francisco ebb tidal delta and south of Sloat Boulevard that threatens valuable public infrastructure ...


77. Digital Data From the Taos West Aeromagnetic Survey in Taos County, New Mexico [USGS_OFR_2007_1248]
This report contains digital data, image files, and text files describing data formats and survey procedures for aeromagnetic data collected during a survey covering the southwestern portion of Taos ...


78. Estimates of Monthly Ground-Water Recharge to the Yakima River Basin Aquifer System, Washington, 1960-2001, for Current Land-Use and Land-Cover Conditions [USGS_OFR_2007_1238]
Monthly values of ground-water recharge, for current land-use and land-cover conditions, to the Yakima River Basin aquifer system, Washington, during water years 1960-2001 were previously estimated. ...


79. Geochemistry of Selected Coal Samples from Sumatra, Kalimantan, Sulawesi, and Papua, Indonesia [USGS_OFR_2007_1202]
Indonesia is an archipelago of more than 17,000 islands that stretches astride the equator for about 5,200 km in southeast Asia (figure 1) and includes major Cenozoic volcano-plutonic arcs, active ...


80. Geophysical Characterization of Pre-Cenozoic Basement for Hydrocarbon Assessment, Yukon Flats, Alaska [USGS_OFR_2007_1208]
The Cenozoic basins of interior Alaska are poorly understood, but may host undiscovered hydrocarbon resources in sufficient quantities to serve remote villages and for possible export. Purported oil ...


81. Lava Flow Hazard Assessment, as of August 2007, for Kilauea East Rift Zone Eruptions, Hawai'i Island [USGS_OFR_2007_1264]
The most recent episode in the ongoing Pu OO-Kupaianaha eruption of Kilauea Volcano is currently producing lava flows north of the east rift zone. Although they pose no immediate threat to communities, ...


82. 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 ...


83. 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 ...


84. 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 ...


85. Estimating Water Storage Capacity of Existing and Potentially Restorable Wetland Depressions in a Subbasin of the Red River of the North [USGS_OFR_2007_1159]
Concern over flooding along rivers in the Prairie Pothole Region has stimulated interest in developing spatially distributed hydrologic models to simulate the effects of wetland water storage on peak ...


86. 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 ...


87. 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 ...


88. 2005 Hydrographic Survey of South San Francisco Bay, California [USGS_OFR_2007_1169]
An acoustic hydrographic survey of South San Francisco Bay (South Bay) was conducted in 2005. Over 20 million soundings were collected within an area of approximately 250 sq km (97 sq mi) of the bay ...


89. Geophysical Data from Spring Valley to Delamar Valley, East-Central Nevada [USGS_OFR_2007_1190]
Cenozoic basins in eastern Nevada and western Utah constitute major ground-water recharge areas in the eastern part of the Great Basin and these were investigated to characterize the geologic framework ...


90. High-Resolution Seismic Imaging Investigations in Salt Lake and Utah Valleys for Earthquake Hazards [USGS_OFR_2007_1152]
In support of earthquake hazards and ground motion studies by researchers at the Utah Geological Survey, University of Utah, Utah State University, Brigham Young University, and San Diego State University, ...


91. Historical Changes in the Mississippi-Alabama Barrier Islands and the Roles of Extreme Storms, Sea Level, and Human Activities [USGS_OFR_2007_1161]
An historical analysis of images and documents shows that the Mississippi-Alabama (MS-AL) barrier islands are undergoing rapid land loss and translocation. The barrier island chain formed and grew ...


92. 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 ...


93. 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 ...


94. 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 ...


95. Flood of May 2006 in New Hampshire [USGS_OFR_2007_1122]
From May 13-17, 2006, central and southern New Hampshire experienced severe flooding caused by as much as 14 inches of rainfall in the region. As a result of the flood damage, a presidential disaster ...


96. Major crustal fault zone trends and their relation to mineral belts in the north-central Great Basin, Nevada [USGS_OFR_2007_1115]
The Great Basin physiographic province covers a large part of the western United States and contains one of the world's leading gold-producing areas, the Carlin Trend. In the Great Basin, many sedimentary-rock-hosted ...


97. 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 ...


98. 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 ...


99. 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 ...


100. Heavy Oil and Natural Bitumen Resources in Geological Basins of the World [USGS_OFR_2007_1084]
Heavy oil and natural bitumen are oils set apart by their high viscosity (resistance to flow) and high density (low API gravity). These attributes reflect the invariable presence of up to 50 weight ...


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