Halfway through Reid's cycle and counting
William L. Ellsworth
2006, Science (312) 203-204
100 years ago, San Francisco was hit by a great earthquake. The subsequent simple models of cyclical fault rupture have not yielded useful pre-dictions; long-term study of seismic mechanisms are still required...
Hydrogeology and simulation of ground-water flow in the Silurian-Devonian aquifer system, Johnson County, Iowa
Patrick Tucci, Robert M. McKay
2006, Scientific Investigations Report 2005-5266
Bedrock of Silurian and Devonian age (termed the “Silurian-Devonian aquifer system”) is the primary source of ground water for Johnson County in east-central Iowa. Population growth within municipal and suburban areas of the county has resulted in increased amounts of water withdrawn from this aquifer and water-level declines in some...
Central Texas coastal classification maps - Aransas Pass to Mansfield Channel
Robert A. Morton, Russell L. Peterson
2006, Open-File Report 2006-1096
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 they have dense populations or valuable resources that are at risk from storm waves. A secondary purpose of the project is...
Hydrogeology, water use, and simulated ground-water flow and availability in Campton township, Kane County, Illinois
Robert T. Kay, Leslie D. Arihood, Terri Arnold, Kathleen K. Fowler
2006, Scientific Investigations Report 2006-5076
Several aquifers underlying Campton Township in Kane County, Illinois provide virtually all of the water supply to the residents of the township. These aquifers consist of layers of unconsolidated sand and gravel in the glacial drift; dolomite and shale of the Alexandrian Series and the Maquoketa Group (the Silurian-Maquoketa aquifer);...
Drivers of U.S. mineral demand
John L. Sznopek
2006, Open-File Report 2006-1025
Introduction: The word 'demand' has different meanings for different people. To some, it means their 'wants and needs,' to others it is what they consume. Yet, when considering economics, demand refers to the specific amounts of goods or services that individuals will purchase at various prices. Demand is...
A Procedure for the supercritical fluid extraction of coal samples, with subsequent analysis of extracted hydrocarbons
Jonathan J. Kolak
2006, Open-File Report 2006-1054
Introduction: This report provides a detailed, step-by-step procedure for conducting extractions with supercritical carbon dioxide (CO2) using the ISCO SFX220 supercritical fluid extraction system. Protocols for the subsequent separation and analysis of extracted hydrocarbons are also included in this report. These procedures were developed under the auspices of the...
Calculation of scour depth at the Parks Highway Bridge on the Tanana River at Nenana, Alaska, using one- and two-dimensional hydraulic models
Dustin E. Langley
2006, Scientific Investigations Report 2006-5023
No abstract available....
Application of ground-water flow and solute-transport models to simulate selected ground-water management scenarios in coastal Georgia and adjacent parts of South Carolina and Florida, 2000-2100
Dorothy F. Payne, Alden M. Provost, Jaime A. Painter, Malek Abu Rumman, Gregory S. Cherry
2006, Scientific Investigations Report 2006-5077
Two-dimensional magnetotelluric model of deep resistivity structure in the Bodie-Aurora district of California
Jay A. Sampson
2006, Open-File Report 2006-1060
Introduction: 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 Nevada Mountains of California and the Basin and Range province of Nevada. Magnetotelluric (MT) geophysical studies...
Characteristics of thermal springs and the shallow ground-water system at Hot Springs National Park, Arkansas
Daniel S. Yeatts
2006, Scientific Investigations Report 2006-5001
Status report: USGS coal assessment of the Powder River Basin, Wyoming
James A. Luppens, Timothy J. Rohrbacher, Jon E. Haacke, David C. Scott, Lee M. Osmonson
2006, Open-File Report 2006-1072
Summary: This publication reports on the status of the current coal assessment of the Powder River Basin (PRB) in Wyoming and Montana. This slide program was presented at the Energy Information Agency's 2006 EIA Energy Outlook and Modeling Conference in Washington, DC, on March 27, 2006. The PRB coal...
Geography at the U.S. Geological Survey
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3038
Geography ? the science of place ? is a bridging, integrating, and synthesizing field because place is a pivotal study element in all the natural sciences. We work to combine our talents with USGS scientists in other disciplines in pursuing the USGS mission ? Science for a Changing World....
Evaluation of the ground-water flow model for northern Utah Valley, Utah, updated to conditions through 2002
Susan A. Thiros
2006, Scientific Investigations Report 2006-5064
This report evaluates the performance of a numerical model of the ground-water system in northern Utah Valley, Utah, that originally simulated ground-water conditions during 1947-1980 and was updated to include conditions estimated for 1981-2002. Estimates of annual recharge to the ground-water system and discharge from wells in the area were...
Simulation of various management scenarios of the Mississippi River valley alluvial aquifer in Arkansas
John B. Czarnecki
2006, Scientific Investigations Report 2006-5052
Improving earthquake and tsunami warnings for the Caribbean Sea, the Gulf of Mexico, and the Atlantic coast
Dan McNamara, Jill McCarthy, Harley Benz
2006, Fact Sheet 2006-3012
Water quality of eleven lakes in eastern and southern Arkansas from August 2004 - July 2005
B. G. Justus
2006, Scientific Investigations Report 2006-5047
Hawaii Forest Bird Interagency Database Project: Collecting, Understanding, and Sharing Population Data on Hawaiian Forest Birds
Thane K. Pratt, Bethany L. Woodworth, Richard J. Camp, P. Marcos Gorresen
2006, Fact Sheet 2006-3013
The forest birds of the Hawaiian Islands are distinguished by the diversity of endemic forms derived from a small number of ancestral colonists. However, the avifauna has been decimated by human activities both before and after Western contact. At least 71 species or subspecies disappeared before the arrival of Capt. James Cook in 1778, and...
Geologic characteristics of benthic habitats in Glacier Bay, southeast Alaska
Jodi N. Harney, Guy R. Cochrane, Lisa L. Etherington, Pete Dartnell, Nadine E. Golden, Hank Chezar
2006, Open-File Report 2006-1081
In April 2004, more than 40 hours of georeferenced submarine digital video was collected in water depths of 15-370 m in Glacier Bay to (1) ground-truth existing geophysical data (bathymetry and acoustic reflectance), (2) examine and record geologic characteristics of the sea floor, and (3) investigate the relation between substrate...
Water resources data, Minnesota, water year 2005
G.B. Mitton, K.G. Guttormson, G.W. Stratton, E.S. Wakeman
2006, Water Data Report MN-05-1
Water resources data for the 2005 water year for Minnesota consist of records of stage, discharge, and water quality of streams; stage of lakes and reservoirs; ground-water quality; and water quality in wells. This report contains discharge records for 116 stream-gaging stations; stage for 11 lakes and reservoirs; water quality...
Water resources data, North Carolina, water year 2005. Volume 1: Surface-water records
D. A. Walters, J. B. Robinson, R.G. Barker
2006, Water Data Report NC-05-1
Water-resources data for the 2005 water year for North Carolina consist of records of stage, discharge, and water quality for streams; stage and contents for lakes and reservoirs; precipitation; and ground-water levels and water quality of ground water. Volume 1 contains discharge records for 215 gaging stations; stage and contents...
Water resources data, North Carolina, water year 2005. Volume 2: Ground-water records
J.M. Fine, B.A. Huffman, P.L. Breton
2006, Water Data Report NC-05-2
Water-resources data for the 2005 water year for North Carolina consist of records of stage, discharge, and water quality for streams; stage and contents for lakes and reservoirs; precipitation; and ground-water levels and water quality of ground water. Volume 1 contains discharge records for 215 gaging stations; stage and contents...
Water resources data, South Carolina, water year 2005
T.W. Cooney, P.A. Drewes, S.W. Ellisor, T. H. Lanier, F. Melendez
2006, Water Data Report SC-05-1
Water resources data, Wyoming, water year 2005; Volume 2. Ground water
K.R. Watson, R. E. Woodruff, G.A. Laidlaw, M. L. Clark, K. A. Miller
2006, Water Data Report WY-05-2
Water resources data, South Dakota, water year 2005
Michael J. Burr, Joyce E. Williamson, Ralph W. Teller, Kathleen M. Neitzert
2006, Water Data Report SD-05-1
Water resources data, Tennessee, water year 2005
D.F. Flohr, J.W. Garrett, J.T. Hamilton, T.D. Phillips
2006, Water Data Report TN-05-1
