Water-quality data collected at Lake Anne, Reston, Virginia, 1997-1999
Kathryn M. Conko, Margaret M. Kennedy, Karen C. Rice
2000, Open-File Report 2000-481
Samples from the Lake Anne watershed were collected and analyzed to assess the water quality from December 1997 through January 1999. Lake Anne is a stream impoundment in suburban Northern Virginia and its outflow is a sub-tributary of the Potomac River. Samples of wet deposition (precipitation), lake water, and streamwater...
Estimation of hydraulic parameters from an unconfined aquifer test conducted in a glacial outwash deposit, Cape Cod, Massachusetts
A.F. Moench, Stephen P. Garabedian, Denis R. LeBlanc
2000, Open-File Report 2000-485
An aquifer test conducted in a sand and gravel, glacial outwash deposit on Cape Cod, Massachusetts was analyzed by means of a model for flow to a partially penetrating well in a homogeneous, anisotropic unconfined aquifer. The model is designed to account for all significant mechanisms expected to influence drawdown...
Preliminary estimate of the amplification of possible earthquake ground motion at a site in Charleston County, South Carolina
Russell L. Wheeler, Chris H. Cramer
2000, Open-File Report 2000-484
We estimate site amplification at the location of a proposed bridge near Charleston, South Carolina. Model calculations indicate that amplification at periods of 1 s and longer is likely to be strongly influenced by the effects of a large contrast in shear-wave velocity at a depth of approximately 1 km (3,000 ft). On-site...
Transport of suspended and bedload sediment at eight stations in the Coeur d'Alene River basin, Idaho
Greg M. Clark, Paul F. Woods
2000, Open-File Report 2000-472
The Remedial Investigation/Feasibility Study conducted by the U.S. Environmental Protection Agency within the Spokane River Basin of northern Idaho and eastern Washington included extensive data-collection activities to determine the nature and extent of trace-element contamination within the basin. As part of the investigation, the U.S. Geological Survey designed and implemented...
Petrology of arkosic sandstones, Pennsylvanian Minturn Formation and Pennsylvanian and Permian Sangre de Cristo Formation, Sangre de Cristo Range, Colorado - data and preliminary interpretations
D. A. Lindsey
2000, Open-File Report 2000-474
This report describes the mineral and chemical composition of immature, arkosic sandstones of the Pennsylvanian Minturn and Pennsylvanian and Permian Sangre de Cristo Formations, which were derived from the Ancestral Rocky Mountains. Located in the Sangre de Cristo Range of southern Colorado, the Minturn and Sangre de Cristo Formations contain...
Digital isostatic gravity map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California
David A. Ponce, E. A. Mankinen, J. G. Davidson, R. L. Morin, R.J. Blakely
2000, Open-File Report 99-554-C
An isostatic gravity map of the Nevada Test Site area was prepared from publicly available gravity data (Ponce, 1997) and from gravity data recently collected by the U.S. Geological Survey (Mankinen and others, 1999; Morin and Blakely, 1999). Gravity data were processed using standard gravity data reduction techniques. Southwest Nevada is...
Digital aeromagnetic map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada and Inyo County, California
David A. Ponce
2000, Open-File Report 99-554-B
An aeromagnetic map of the Nevada Test Site area was prepared from publicly available aeromagnetic data described by McCafferty and Grauch (1997). Magnetic surveys were processed using standard techniques. Southwest Nevada is characterized by magnetic anomalies that reflect the distribution of thick sequences of volcanic rocks, magnetic sedimentary rocks, and...
Towards policy relevant environmental modeling: contextual validity and pragmatic models
Scott B. Miles
2000, Open-File Report 2000-401
"What makes for a good model?" In various forms, this question is a question that, undoubtedly, many people, businesses, and institutions ponder with regards to their particular domain of modeling. One particular domain that is wrestling with this question is the multidisciplinary field of environmental modeling. Examples of environmental models...
Hawaiian Volcano Observatory: Summary 96; part 1, seismic data, January to December 1996, with a chronological summary
Jennifer S. Nakata, C. C. Heliker, Carl R. Thornber, David R. Sherrod
2000, Open-File Report 2000-354
No abstract available....
MORPH-II, a software package for the analysis of scanning-electron-micrograph images for the assessment of the fractal dimension of exposed stone surfaces
Victor G. Mossotti, A. Raouf Eldeeb
2000, Open-File Report 2000-13
Turcotte, 1997, and Barton and La Pointe, 1995, have identified many potential uses for the fractal dimension in physicochemical models of surface properties. The image-analysis program described in this report is an extension of the program set MORPH-I (Mossotti and others, 1998), which provided the fractal analysis of electron-microscope images...
Hawaiian Volcano Observatory summary 95; Part 1, seismic data, January to December 1995, with a chronological summary
Jennifer S. Nakata, Carl R. Thornber, Jennifer Reynolds, C. C. Heliker
2000, Open-File Report 2000-353
No abstract available....
Preliminary report on geophysics of the Verde River headwaters region, Arizona
Victoria E. Langenheim, J. S. Duval, Laurie Wirt, Ed DeWitt
2000, Open-File Report 2000-403
This report summarizes the acquisition, data processing, and preliminary interpretation of a high-resolution aeromagnetic and radiometric survey near the confluence of the Big and Little Chino basins in the headwaters of the Verde River, Arizona. The goal of the aeromagnetic study is to improve understanding of the geologic framework as...
Geologic map database of the El Mirage Lake area, San Bernardino and Los Angeles Counties, California
David M. Miller, David R. Bedford
2000, Open-File Report 2000-222
This geologic map database for the El Mirage Lake area describes geologic materials for the dry lake, parts of the adjacent Shadow Mountains and Adobe Mountain, and much of the piedmont extending south from the lake upward toward the San Gabriel Mountains. This area lies within the western Mojave Desert...
Archive of Boomer subbottom data collected during USGS cruise MGNM 99023 southern Long Island, NY inner shelf and Hudson Shelf Valley 26-31 July, 1999
E. Robert Thieler, J. C. Hill, Robert Brooks, Benjamin Gutierrez, B.J. Irwin, D.R. Nichols
2000, Open-File Report 2000-274
Archive of Boomer subbottom data collected during USGS cruise ATSV 99044, Myrtle Beach, South Carolina, 29 October - 12 November, 1999
Jenna C. Hill, W. C. Schwab, S. V. Dadisman, W. W. Danforth, J. F. Denny, T.F. O’Brien, K. F. Parolski
2000, Open-File Report 2000-153
Archive of boomer and sparker subbottom data collected during USGS Cruise DIAN 97032, Long Island, NY inner shelf; Fire Island, NY 25 September-19 October, 1997
Jenna C. Hill, E.R. Thieler, D.S. Foster, B.A. Swift, T.F. O’Brien
2000, Open-File Report 2000-142
Archive of datasonic SIS-1000 CHIRP subbottom data collected during USGS Cruise DIAN 97032, Long Island, New York Inner Shelf; Fire Island, New York 25 September-19 October, 1997
Jenna C. Hill, E.R. Thieler, D.S. Foster, B.A. Swift, T.F. O’Brien
2000, Open-File Report 2000-152
Ground geophysical study of the Buckeye mine tailings, Boulder watershed, Montana
Robert R. McDougal, Bruce D. Smith
2000, Open-File Report 2000-371
The Buckeye mine site is located in the Boulder River watershed along Basin Creek, in northern Jefferson County, Montana. This project is part of the Boulder River watershed Abandoned Mine Lands Initiative, and is a collaborative effort between the U.S. Geological Survey and Bureau of Land Management in the U.S....
Archive of datasonics SIS-1000 CHIRP subbottom data collected during USGS cruise DIAN 96040, Fire Island, New York, 4-24 September 1996
J. C. Hill, W. C. Schwab, D.S. Foster
2000, Open-File Report 2000-366
Map and database of Quaternary faults in Bolivia and Chile
Alain Lavenu, Ricardo Thiele, Michael N. Machette, Richard L. Dart, Lee-Ann Bradley, Kathleen M. Haller
2000, Open-File Report 2000-283
Physical characteristics of dungeness crab and halibut habitats in Whidbey Passage, Alaska
Guy R. Cochrane, Paul R. Carlson, Michael E. Boyle, Gregory L. Gabel, Philip N. Hooge
2000, Open-File Report 2000-32
In Glacier Bay National Park, Alaska there are ongoing studies of Dungeness Crab (Cancer magister) and Pacific Halibut (Hippoglosus stenolepis). Scientists of the United States Geological Survey (USGS) are attempting to ascertain life history, distribution, and abundance, and to determine the effects of commercial fishing in the park (Carlson et...
Rock geochemistry in the Tuscarora Mountains, northern Carlin Trend, Nevada
T. G. Theodore, B. B. Kotlyar, D.A. Singer, V.I. Berger, B. C. Moring, J.K. Cluer
2000, Open-File Report 2000-402
Aeromagnetic Survey of the Amargosa Desert, Nevada and California: A Tool for Understanding Near-Surface Geology and Hydrology
Richard J. Blakely, Victoria E. Langenheim, David A. Ponce, Gary L. Dixon
2000, Open-File Report 2000-188
A high-resolution aeromagnetic survey of the Amargosa Desert and surrounding areas provides insights into the buried geology of this structurally complex region. The survey covers an area of approximately 7,700 km2 (2,970 mi2), extending from Beatty, Nevada, to south of Shoshone, California, and includes parts of the Nevada Test Site...
USGS East-Coast sediment analysis: Procedures, database, and georeferenced displays
Lawrence J. Poppe, C. F. Polloni
2000, Open-File Report 2000-358
No abstract available....
A ground electromagnetic survey used to map sulfides and acid sulfate ground waters at the abandoned Cabin Branch Mine, Prince William Forest Park, northern Virginia gold-pyrite belt
Jeffrey C. Wynn
2000, Open-File Report 2000-360
INTRODUCTION AND BACKGROUND: Prince William Forest Park is situated at the northeastern end of the Virginia Gold-Pyrite belt northwest of the town of Dumfries, VA. The U. S. Marine Corps Reservation at Quantico borders the park on the west and south, and occupies part of the same watershed. Two abandoned...
