Plutons and accretionary episodes of the Klamath Mountains, California and Oregon
William P. Irwin, Joseph L. Wooden
1999, Open-File Report 99-374
The Klamath Mountains consist of various accreted terranes and include many plutons that range in composition from gabbro to granodiorite. Some of the plutons (preaccretionary plutons) were parts of terranes before the terranes accreted; others (accretionary plutons) intruded during or after the accretion of their host terrane(s). This report attempts...
The Midwestern Basins and Arches regional aquifer system in parts of Indiana, Ohio, Michigan, and Illinois — Summary
Edward F. Bugliosi
1999, Professional Paper 1423-A
The Midwestern Basins and Arches aquifer system is composed of surficial deposits of Pleistocene and Holocene age and of Silurian and Devonian age carbonate rock in parts of Indiana, Illinois, Michigan, and Ohio. The study area encompasses a complex of structural arches--the Cincinnati, Findlay, and Kankakee arches--and it is bounded...
Geometry, structure, and concealed lithology of the San Rafael Basin, southeastern Arizona
Mark W. Bultman
1999, Open-File Report 99-399
The contiguous United States has been well explored for exposed conventional mineral deposits. Therefore, it is likely that many economically viable and strategically significant conventional undiscovered mineral deposits will be found in bedrock concealed beneath basin sediments. Mineral resource assessments must incorporate an understanding of the geometry, structure, and concealed...
Geophysical investigation of the nearshore geologic framework, eastern Casco Bay-Reid State Park, Maine: Data analysis and implications for Late Quaternary coastal evolution
I. V. Buynevich, D. M. FitzGerald, K. F. Parolski
1999, Open-File Report 99-380
No abstract available....
Evaluation of weights of evidence to predict epithermal-gold deposits in the Great Basin of the western United States
Gary L. Raines
1999, Natural Resources Research (8) 257-276
The weights-of-evidence method provides a simple approach to the integration of diverse geologic information. The application addressed is to construct a model that predicts the locations of epithermal-gold mineral deposits in the Great Basin of the western United States. Weights of evidence is a data-driven method requiring known deposits and...
Geologic map of the Allentown East quadrangle, Lehigh, Northampton, and Bucks Counties, Pennsylvania
Avery Drake Jr.
1999, Geologic Quadrangle 1804
No abstract available....
Geochemistry of stream-sediment samples from the Santa Renia Fields and Beaver Peak quadrangles, northern Carlin Trend, Nevada
Ted G. Theodore, Boris B. Kotlyar, Vladimir I. Berger, Barry C. Moring, Donald A. Singer, Sven A. Edstrom
1999, Open-File Report 99-341
A broad west-to-east increase of many metal concentrations has been found in stream sediments during a reconnaissance investigation conducted in conjunction with geologic studies in the Santa Renia Fields and Beaver Peak 7–1/2 minute quadrangles near the northern end of the Carlin trend of gold deposits in the Tuscarora Mountains....
Cruise report; RV Coastal Surveyor Cruise C1-99; multibeam mapping of the Long Beach, California continental shelf; April 12 through May 19, 1999
James V. Gardner, John E. Hughes Clarke, Larry A. Mayer
1999, Open-File Report 99-360
The greater Los Angeles area of California is home to more than 10 million people. This large population puts increased pressure on the adjacent offshore continental shelf and margin with activities such as ocean disposal for dredged spoils, explosive disposal, waste-water outfall, and commercial fishing. The increased utilization of the...
Tertiary coals in South Texas: Anomalous cannel-like coals of Webb County (Claiborne Group, Eocene) and lignites of Atascosa County (Jackson Group, Eocene) - Geologic setting, character, source-rock and coal-bed methane potential
Peter D. Warwick, Claire E. Aubourg, Jason C. Willett, editor(s)
1999, Open-File Report 99-301
The coal-bearing Gulf of Mexico Coastal Plain of North America contains a variety of depositional settings and coal types. The coal-bearing region extends westward from Alabama and Mississippi, across Louisiana to the northern part of the Mississippi Embayment, and then southward to eastern Arkansas, Texas and northern Mexico (fig. 1)....
Nutrients, pesticides, and pesticide metabolites discharged to the Mississippi River from Eastern Iowa Watersheds
D.J. Schnoebelen, Kent Becher
1999, Conference Paper
No abstract available....
Occurrence and distribution of chloroacetanilide and triazine pesticide metabolites in streams in eastern Iowa
Stephen J. Kalkhoff, E.M. Thurman
1999, Conference Paper
No abstract available....
Water quality and habitat conditions in upper Midwest streams relative to riparian vegetation and soil characteristics, August 1997 : study design, methods, and data
S. K. Sorenson, S. D. Porter, K.B. Akers, M.A. Harris, S. J. Kalkhoff, K. E. Lee, L. Roberts, P. J. Terrio
1999, Open-File Report 99-202
Water-chemistry, biological, and habitat data were collected from 70 sites on Midwestern streams during August 1997 as part of an integrated, regional water-quality assessment by the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program. The study area includes the Corn Belt region of southern Minnesota, eastern Iowa, and west-central Illinois,...
Geologic map of Precambrian Rocks, Rawhide Buttes West quadrangle and part of Rawhide Buttes East quadrangle, Hartville Uplift, Goshen and Niobrara Counties, Wyoming
W. C. Day, P.K. Sims, G. L. Snyder, A.B. Wilson, T. L. Klein, Z. E. Peterman, Kiyoto Futa, R. E. Zartman
1999, IMAP 2635
No abstract available....
Estimated hydraulic properties for the surficial- and bedrock-aquifer system, Meddybemps, Maine
Forest P. Lyford, Stephen P. Garabedian, Bruce P. Hansen
1999, Open-File Report 99-199
Analytical and numerical-modeling methods were used to estimate hydraulic properties of the aquifer system underlying the Eastern Surplus Company Superfund Site in Meddybemps, Maine. Estimates of hydraulic properties are needed to evaluate pathways for contaminants in ground water and to support evaluation and selection of remediation measures for contaminated ground...
Gravity and magnetic study of the Pahute Mesa and Oasis Valley region, Nye County, Nevada
Edward A. Mankinen, Thomas G. Hildenbrand, Gary L. Dixon, Edwin H. McKee, Christopher J. Fridrich, Randell J. Laczniak
1999, Open-File Report 99-303
Regional gravity and aeromagnetic maps reveal the existence of deep basins underlying much of the southwestern Nevada volcanic field, approximately 150 km northwest of Las Vegas. These maps also indicate the presence of prominent features (geophysical lineaments) within and beneath the basin fill. Detailed gravity surveys were conducted in order...
Groundwater geochemistry in the Seminole Well Field, Cedar Rapids, Iowa
Robert A. Boyd
1999, Journal of the American Water Resources Association (35) 1257-1268
The City of Cedar Rapids obtains its municipal water supply from four well fields in an alluvial aquifer along the Cedar River in east-central Iowa. Since 1992, the City and the U.S. Geological Survey have cooperatively studied the groundwater-flow system and water chemistry near the well fields. The geochemistry in...
An in situ occurrence of coal balls in the Amburgy coal bed, Pikeville Formation (Duckmantian), central Appalachian Basin, USA
Stephen F. Greb, Cortland F. Eble, D.R. Chesnut Jr., T.L. Phillips, James C. Hower
1999, Palaios (14) 432-450
Carbonate concretions containing permineralized peat, commonly called coal balls, were encountered in the Amburgy coal, a generally low-ash (9.4%), but commonly high-sulfur (3.6%), Middle Pennsylvanian coal of the Eastern Kentucky Coal Field. These are the first coal balls from the Amburgy coal, and one of only a few reported occurrences...
Geochemical investigations and interim recommendations for priority abandoned mine sites on U.S.D.A. Forest Service lands, Mineral Creek watershed, San Juan County, Colorado
J. T. Nash
1999, Open-File Report 99-170
Field observations, sampling of mine dumps and mine drainage waters, and laboratory studies of dump materials have been made at mining areas deemed to be on public lands administered by the USDA Forest Service in the Mineral Creek watershed. Results of chemical analyses of dump materials, leachates of those materials, and of surface waters...
Water-quality assessment of the eastern Iowa basins: Data, September 1995 through September 1996
Kimberlee K.B. Akers, Douglas J. Schnoebelen, Mark E. Savoca, Linda R. Roberts, Kent Becher
1999, Open-File Report 99-66
The U.S. Geological Survey began data-collection activities in the Eastern Iowa Basins study unit of the National Water-Quality Assessment Program in September 1995 with the purpose of determining the status and trends in water quality. Surface-water data were collected, beginning in March 1996, on a monthly basis with occasional extra...
Lithologic, age group, magnetopolarity, and geochemical maps of the Springerville Volcanic Field, east-central Arizona
Christopher D. Condit, Larry S. Crumpler, Jayne C. Aubele
1999, IMAP 2431
The Springerville volcanic field is one of the many late Pliocene to Holocene, mostly basaltic, volcanic fields present near the Colorado Plateau margin (fig. 1, in pamphlet). The field overlies the lithospheric transition zone between the Colorado Plateau and the Basin and Range Province (Condit and others, 1989b). Establishing relations...
Flood of June 15-17, 1998, Nishnabotna and East Nishnabotna rivers, Southwest Iowa
E.E. Fischer
1999, Open-File Report 99-70
Record flooding occurred June 15-17, 1998, in the Nishnabotna and East Nishnabotna River basins following severe thunderstorm activity over southwest Iowa. More than 8 inches of rain fell over a large part of Cass County. The rain gage at Atlantic, Iowa recorded a 24-hour total rainfall of 13.18 inches, which...
Geologic map of the Scotts Mills, Silverton, and Stayton Northeast 7.5 minute quadrangles, Northwest Oregon: A digital database
Terry Tolan, Marvin Beeson, Karen L. Wheeler
1999, Open-File Report 99-141
The Scotts Mills, Silverton, and Stayton NE 7.5 minute quadrangles are situated along the eastern margin of the Willamette Valley and adjacent lower foothills (Waldo and Silverton Hills) of the Cascade Range (Fig. 1). The terrain within this area is of low to moderate relief, ranging from 100 to more...
An evaluation of sand and gravel resources in and near the Prescott National Forest in the Verde Valley, Arizona, with a section on evaluation of sand and gravel resources using selected engineering variables
Leslie J. Cox, James D. Bliss, Robert J. Miller
1999, Open-File Report 99-127
This study was based on available published literature. Although no field investigation was conducted in the Prescott National Forest to the west of the Verde River, a field investigation was conducted in the summer of 1994 by this author on the Coconino National Forest, to the east of the Verde...
Comparison of seismic slope-performance models: Case study of the Oakland East quadrangle, California
Scott B. Miles, David K. Keefer
1999, Open-File Report 99-137
No abstract available....
Microbial and spectral reflectance techniques to distinguish neutral and acidic drainage
Eleanora I. Robbins
1999, Fact Sheet 118-99
Acid drainage from abandoned coal mines is affecting thousands of miles of rivers in the eastern United States. U.S. Geological Survey (USGS) scientists are finding that neutral drainage is sometimes being mistaken for acidic drainage because both involve the formation of iron oxide-rich materials. USGS scientists are adapting microbial techniques to learn...
