Downstream aggradation owing to lava dome extrusion and rainfall runoff at Volcán Santiaguito, Guatemala
Andrew J. L. Harris, James W. Vallance, Paul Kimberly, William I. Rose, Otoniel Matias, Elly Bunzendahl, Luke P. Flynn, Harold Garbeil
2006, GSA Special Papers (412) 85-104
Persistent lava extrusion at the Santiaguito dome complex (Guatemala) results in continuous lahar activity and river bed aggradation downstream of the volcano. We present a simple method that uses vegetation indices extracted from Landsat Thematic Mapper (TM) data to map impacted zones. Application of this technique to a time...
Magnetotelluric survey to locate the Archean/Proterozoic suture zone north of Wells, Nevada
Jackie M. Williams, Brian D. Rodriguez
2006, Open-File Report 2006-1119
It is important to know whether major mining districts in the Northern Nevada Gold Province are underlain by rocks of the Archean Wyoming craton, which are known to contain orogenic gold deposits, or by accreted rocks of the Paleoproterozoic Mojave province. It is also important to know the location and...
Geologic map of the Western Grove quadrangle, northwestern Arkansas
Mark R. Hudson, Kenzie J. Turner, John E. Repetski
2006, Scientific Investigations Map 2921
This map summarizes the geology of the Western Grove 7.5-minute quadrangle in northern Arkansas that is located on the southern flank of the Ozark dome, a late Paleozoic regional uplift. The exposed bedrock of this map area comprises approximately 1,000 ft of Ordovician and Mississippian carbonate and clastic sedimentary rocks...
Freshwater diatomite deposits in the western United States
Alan R. Wallace, David G. Frank, Alan Founie
2006, Fact Sheet 2006-3044
Freshwater diatomite deposits in the Western United States are found in lake beds that formed millions of years ago. These diatom-rich sediments are among the Nation's largest commercial diatomite deposits. Each deposit contains billions of tiny diatom skeletons, which are widely used for filtration, absorption, and abrasives. New studies by...
Geophysical studies of the Crump Geyser known geothermal resource area, Oregon, in 1975
Donald Plouff
2006, Open-File Report 2006-1110
The U.S. Geological Survey (USGS) conducted geophysical studies in support of the resource appraisal of the Crump Geyser Known Geothermal Resource Area (KGRA). This area was designated as a KGRA by the USGS, and this designation became effective on December 24, 1970. The land classification standards for a KGRA were...
Aeromagnetic survey of Dillingham area in southwest Alaska, a website for the preliminary distribution of data
Water Resources Division, U.S. Geological Survey
2006, Open-File Report 2006-1136
An airborne high-resolution magnetic survey was completed over the Dillingham and Nushagak Bay and Naknek area in southwestern Alaska. The flying was undertaken by McPhar Geosurveys Ltd. on behalf of the United States Geological Survey (USGS). First tests and calibration flights were completed by August 26th, 2005 and data acquisition...
Capitol Lake, Washington, 2004 data summary
Jodi Eshleman, Peter Ruggiero, Etienne Kingsley, Guy Gelfenbaum, Doug George
2006, Data Series 180
At the request of the Washington Department of Ecology (WDOE), the US Geological Survey (USGS) collected bathymetry data in Capital Lake, Olympia, Wash., on September 21, 2004. The data are to be used to calculate sediment infilling rates within the lake as well as for developing the bottom boundary conditions...
Database for the geologic map of the Sauk River 30-minute by 60-minute quadrangle, Washington (I-2592)
R. W. Tabor, D. B. Booth, J.A. Vance, A. B. Ford
2006, Data Series 188
This digital map database has been prepared by R.W. Tabor from the published Geologic map of the Sauk River 30- by 60 Minute Quadrangle, Washington. Together with the accompanying text files as PDF, it provides information on the geologic structure and stratigraphy of the area covered. The database delineates map...
User's guide to the Variably Saturated Flow (VSF) process to MODFLOW
R. Brad Thoms, Richard L. Johnson, Richard W. Healy
2006, Techniques and Methods 6-A18
A new process for simulating three-dimensional (3-D) variably saturated flow (VSF) using Richards' equation has been added to the 3-D modular finite-difference ground-water model MODFLOW. Five new packages are presented here as part of the VSF Process--the Richards' Equation Flow (REF1) Package, the Seepage Face (SPF1) Package, the Surface Ponding...
Summary of available hydrogeologic data for the northeast portion of the alluvial aquifer at Louisville, Kentucky
Michael D. Unthank, Hugh L. Nelson
2006, Open-File Report 2006-1146
The hydrogeologic characteristics of the unconsolidated glacial outwash sand and gravel deposits that compose the northeast portion of the alluvial aquifer at Louisville, Kentucky, indicate a prolific water-bearing formation with approximately 7 billion gallons of ground-water storage and an estimated sustainable yield of over 280 million gallons per day. This...
A database of lotic invertebrate traits for North America
Nicole M. K. Vieira, N. LeRoy Poff, Daren M. Carlisle, Stephen R. Moulton II, Marci L. Koski, Boris C. Kondratieff
2006, Data Series 187
The assessment and study of stream communities may be enhanced if functional characteristics such as life-history, habitat preference, and reproductive strategy were more widely available for specific taxa. Species traits can be used to develop these functional indicators because many traits directly link functional roles of organisms with controlling environmental...
Geologic map of the Colonial Beach South 7.5-minute quadrangle, Virginia
Wayne L. Newell, Owen P. Bricker, Meredith S. Robertson
2006, Open-File Report 2005-1025
The Open-File Report includes a geologic map with cross section, and composite stratigraphic section of the Tertiary stratigraphy and of the Quaternary stratigraphy. The Tertiary map units are presented and interpreted for erodability and derived surficial deposits. The map area contains the George Washington Birthplace National Monument. The map facilitates the...
Mineral facilities of Africa and the Middle East
J.M. Eros, Luissette Candelario-Quintana
2006, Open-File Report 2006-1135
This map displays over 1,500 mineral facilities in Africa and the Middle East. The mineral facilities include mines, plants, mills, or refineries of aluminum, cement, coal, copper, diamond, gold, iron and steel, nickel, platinum-group metals, salt, and silver, among others. The data used in this poster were compiled from multiple...
Database for the geologic map of the Snoqualmie Pass 30-minute by 60-minute quadrangle, Washington (I-2538)
R. W. Tabor, V. A. Frizzell Jr., D. B. Booth, R. B. Waitt
2006, Data Series 186
This digital map database has been prepared by R.W. Tabor from the published Geologic map of the Snoqualmie Pass 30' X 60' Quadrangle, Washington. Together with the accompanying text files as PDF, it provides information on the geologic structure and stratigraphy of the area covered. The database delineates map units...
Effects of irrigation practices on water use in the groundwater management districts within the Kansas high plains, 1991-2003
Charles A. Perry
2006, Scientific Investigations Report 2006-5069
Data compiled for the High Plains region of Kansas that includes five Groundwater Management Districts (GMDs) were analyzed for trends in irrigation water use, acres irrigated, precipitation, irrigation system types, and irrigated crop types to determine the effects of irrigation practices on water use over time. For the study period...
Undiscovered oil and gas resources underlying the U.S. portions of the Great Lakes, 2005
James L. Coleman Jr., Christopher S. Swezey, Robert T. Ryder, Ronald R. Charpentier
2006, Fact Sheet 2006-3049
The U.S. Geological Survey (USGS) completed an assessment of the undiscovered oil and gas potential of the U.S. portions of the Appalachian Basin and the Michigan Basin in 2002 and 2004, respectively. Following the assessments of these two basins, oil and gas allocations were assigned to the U.S. portions of...
Approach to an assessment of volatile organic compounds in the nation's ground water and drinking-water supply wells
Michael J. Moran, John S. Zogorski, Barbara L. Rowe
2006, Open-File Report 2005-1452
The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) developed an approach for a national assessment of the occurrence, status, and distribution of volatile organic compounds (VOCs) in samples of ground water from aquifer studies and in samples from drinking-water supply wells, specifically domestic and public wells....
Geology, ground-water hydrology, geochemistry, and ground-water simulation of the Beaumont and Banning Storage Units, San Gorgonio Pass area, Riverside County, California
Diane L. Rewis, Allen H. Christensen, Jonathan Matti, Joseph A. Hevesi, Tracy Nishikawa, Peter Martin
2006, Scientific Investigations Report 2006-5026
Ground water has been the only source of potable water supply for residential, industrial, and agricultural users in the Beaumont and Banning storage units of the San Gorgonio Pass area, Riverside County, California. Ground-water levels in the Beaumont area have declined as much as 100 feet between the early 1920s...
Idaho and Montana non-fuel exploration database 1980-1997
David A. Buckingham, Carl A. DiFrancesco, Kenneth E. Porter, Donald I. Bleiwas, J. Douglas Causey, William B. Ferguson
2006, Data Series 173
This report describes a relational database containing information about mineral exploration projects in the States of Idaho and Montana for the years 1980 through 1997 and a spatial (geographic) database constructed using data from the relational database. The focus of this project was to collect information on exploration for mineral...
Data collection for the assessment of aquatic communities in northeastern Wyoming and southeastern Montana, 2005
Peter R. Wright, David A. Peterson, Laura L. Hallberg
2006, Fact Sheet 2006-3047
Water resources data Maryland, Delaware, and Washington, D.C.,water year 2005, Volume 1. Surface-water data
Richard W. Saffer, Robert H. Pentz, Anthony J. Tallman
2006, Water Data Report MD-DE-DC-05-1
Water resources data for the 2005 water year for Maryland, Delaware, and Washington, D.C. consist of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs. This volume (Volume 1. Surface-Water Data) contains records for water discharge at 145 gaging stations; stage and contents...
Annual dissolved nitrite plus nitrate and total phosphorous loads for the Susquehanna, St. Lawrence, Mississippi-Atchafalaya, and Columbia River basins, 1968-2004
Brent T. Aulenbach
2006, Open-File Report 2006-1087
Annual stream-water loads were calculated near the outlet of four of the larger river basins (Susquehanna, St. Lawrence, Mississippi-Atchafalaya, and Columbia) in the United States for dissolved nitrite plus nitrate (NO2 + NO3) and total phosphorus using LOADEST load estimation software. Loads were estimated for the period 1968-2004; although loads...
Rainfall, runoff, and water-quality data for the urban storm-water program in the Albuquerque, New Mexico, metropolitan area, water year 2004
Todd Kelly, Orlando Romero, Mike Jimenez
2006, Open-File Report 2006-1105
Urbanization has dramatically increased precipitation runoff to the system of drainage channels and natural stream channels in the Albuquerque, New Mexico, metropolitan area. Rainfall and runoff data are important for planning and designing future storm-water conveyance channels in newly developing areas. Storm-water quality also is monitored in accordance with the...
A guide for using the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California
Joan B. Blainey, Claudia C. Faunt, Mary C. Hill
2006, Open-File Report 2006-1104
This report is a guide for executing numerical simulations with the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California using the U.S. Geological Survey modular finite-difference ground-water flow model, MODFLOW-2000. Model inputs, including observations of hydraulic head, discharge, and boundary flows, are summarized....
Assessment of hydrologic and water quality data collected in Abbotts Lagoon watershed, Point Reyes National Seashore, California, during water years 1999 and 2000
Charles R. Kratzer, Dina K. Saleh, Celia Zamora
2006, Scientific Investigations Report 2005-5261
Abbotts Lagoon is part of Point Reyes National Seashore, located about 40 miles northwest of San Francisco and about 20 miles south of Bodega Bay. Water-quality samples were collected quarterly during water year 1999 at a site in each of three connected lagoons that make up Abbotts Lagoon and at...
