The surface of crystalline basement, Great Valley and Sierra Nevada, California: A digital map database
Carl M. Wentworth, G. Reid Fisher, Paia Levine, Robert C. Jachens
1995, Open-File Report 95-96
Crystalline basement in central California extends westward from the exposed Sierra Nevada beneath the sedimentary fill of the Great Valley and under the eastern edge of the Coast Ranges at mid-crustal depth. The surface of this basement is defined from three types of control: in the Sierra Nevada from the...
Potentiometric surface of the Sparta and Memphis aquifers in eastern Arkansas, April through July 1993
Paul W. Westerfield
1995, Water-Resources Investigations Report 95-4000
A water-level map of the Sparta and Memphis aquifers for 1993 is presented in this map report. The Sparta-Memphis aquifer, consisting of sands of Eocene age, is present in much of southern and eastern Arkansas. The potentiometric surface map and long-term hydrographs illustrate the effects of large withdrawals for industrial...
Coal geology of the Paleocene-Eocene Calvert Bluff Formation (Wilcox Group) and the Eocene Manning Formation (Jackson Group) in east-central Texas: Field trip guidebook for the Society for Organic Petrology, Twelfth Annual Meeting, The Woodlands, Texas, August 30, 1995
Peter D. Warwick, Sharon S. Crowley
1995, Open-File Report 95-595
The Jackson and Wilcox Groups of eastern Texas (fig. 1) are the major lignite producing intervals in the Gulf Region. Within these groups, the major lignite-producing formations are the Paleocene-Eocene Calvert Bluff Formation (Wilcox) and the Eocene Manning Formation (Jackson). According to the Keystone Coal Industry Manual (Maclean Hunter Publishing...
Ground-water flow and water quality in the sand aquifer of Long Beach Peninsula, Washington
Blakemore E. Thomas
1995, Water-Resources Investigations Report 95-4026
This report describes an investigation of ground-water flow and water quality in the sand aquifer of the Long Beach Peninsula. The peninsula is located in the southwestern corner of the State of Washington, is about 27 miles long, and has an average width of about 1.5 miles. It is surrounded...
Geochemical and hydrologic controls on phosphorus transport in a sewage-contaminated sand and gravel aquifer near Ashumet Pond, Cape Cod, Massachusetts
D. A. Walter, B.A. Rea, K.G. Stollenwerk, Jennifer G. Savoie
1995, Open-File Report 95-381
The disposal of secondarily treated sewage onto rapid infiltration sand beds at the Massachusetts Military Reservation, Cape Cod, Massachusetts, has created a sewage plume in the underlying sand and gravel aquifer; the part of the\x11sewage plume that contains dissolved phosphorus extends about 2,500 feet downgradient of the sewage-disposal beds. A...
Geology and hydrology of the Edwards Aquifer in the San Antonio area, Texas
Robert W. Maclay
1995, Water-Resources Investigations Report 95-4186
The Edwards aquifer, which is the sole source of water for the city of San Antonio, is one of the most permeable and productive carbonate aquifers in the United States. The aquifer is composed of extensively faulted, fractured, and cavernous limestone and dolomite of Early Cretaceous age lying within the...
Depth to water, 1991, in the Rathdrum Prairie, Idaho; Spokane River valley, Washington; Moscow-Lewiston-Grangeville area, Idaho; and selected intermontane valleys, east-central Idaho
Charles E. Berenbrock, M. D. Bassick, T. L. Rogers, S. P. Garcia
1995, Water-Resources Investigations Report 94-4087
This map report illustrates digitally generated depth-to-water zones for the Rathdrum Prairie in Idaho; part of the Spokane River Valley in eastern Washington; and the intermontane valleys of the upper Big Wood, Big Lost, Pahsimeroi, Little Lost, and Lemhi Rivers and Birch Creek in Idaho. Depth to water is 400...
Ground-water flow and the possible effects of remedial actions at J-Field, Aberdeen Proving Ground, Maryland
W.B. Hughes
1995, Water-Resources Investigations Report 95-4075
J-Field, located in the Edgewood Area of Aberdeen Proving Ground, Md, has been used since World War II to test and dispose of explosives, chemical warfare agents, and industrial chemicals resulting in ground-water, surface-water, and soil contami- nation. The U.S. Geological Survey finite-difference model was used to better understand ground-water...
Broadband seismology and small regional seismic networks
Robert B. Herrmann
1995, Professional Paper 1538-S
In the winter of 1811-12, three of the largest historic earthquakes in the United States occurred near New Madrid, Missouri. Seismicity continues to the present day throughout a tightly clustered pattern of epicenters centered on the bootheel of Missouri, including parts of northeastern Arkansas, northwestern Tennessee, western Kentucky, and southern...
Geologic, geochemical, and isotopic studies of a carbonate- and siliciclastic-hosted Pb-Zn deposit at Lion Hill, Vermont
Nora K. Foley, Sandra H. B. Clark, Laurel G. Woodruff, Elwin L. Mosier
1995, Bulletin 2145
Zn-, Pb-, Cu-, and Fe-bearing rocks of the Lion Hill area in western Vermont formed during the Early Cambrian by syngenetic sedimentary-exhalative and diagenetic replacement processes. Sphalerite, galena, chalcopyrite, pyrite, and, locally, magnetite form stratabound and broadly stratiform lenticular zones, -300 meters long and 25-50 meters thick, which are uneconomic...
Geology of the Waterford quadrangle, Virginia and Maryland, and the Virginia part of the Point of Rocks quadrangle
William C. Burton, A.J. Froelich, J. S. Pomeroy, K. Y. Lee
1995, Bulletin 2095
The bedrock geology of the Waterford quadrangle and of the Virginia part of the Point of Rocks quadrangle consists of a portion of the Middle Proterozoic basement core and its cover sequence on the eastern limb of the Blue Ridge anticlinorium and the adjacent early Mesozoic Culpeper basin. The three...
National Water-Quality Assessment Program; summary of pesticide data collected on East Fork Double Bayou, near Anahuac, Texas, March to September 1994
Water Resources Division, U.S. Geological Survey
1995, Fact Sheet 140-95
The Trinity River Basin study-unit assessment began in October 1991, with 2 years dedicated to planning, analyzing existing information, and designing data-collection networks, surveys, and studies. Then, a 3-year intensive data-collection program was initiated. The assessment followed guidelines provided by the National Water-Quality Assessment (NAWQA) Program National Synthesis team and...
Age and diagenesis of the upper Floridan Aquifer and the intermediate aquifer system in southwestern Florida
Lucy McCartan, S.D. Weedman, G.L. Wingard, Lucy E. Edwards, P. J. Sugarman, M.D. Feigenson, M. L. Buursink, J.C. Libarkin
1995, Bulletin 2122
No abstract available....
Preliminary analysis of down-core biotic assemblages Bob Allen Keys, Everglades National Park, Florida Bay
G. L. Brewster-Wingard, S. E. Ishman, Thomas M. Cronin, Lucy E. Edwards, Debra A. Willard, R. B. Halley
1995, Open-File Report 95-628
IntroductionA series of short piston cores (< 2m) were taken from eleven stations in Florida Bay in May, 1994 by researchers from the U.S. Geological Survey (St. Petersburg, FL., Woods Hole, MA., and Denver CO.) in cooperation with South Florida Water Management District, and the Everglades National Park, and the...
Cretaceous and Paleogene calcareous nannofossil biostratigraphy of New Jersey
Jean Self-Trail, Laurel M. Bybell
1995, Book chapter, Contributions to the paleontology of New Jersey
No abstract available....
Porphyry copper and other intrusion-related mineralization in Mexico
Mark D. Barton, John-Mark G. Staude, Lukas Zurcher, Peter K. M. Megaw
1995, Book chapter, Porphyry copper deposits of the American Cordillera
Intrusion-related copper-bearing ore deposits in Mexico span a wide-range of deposit types and geological settings and formed from the mid-Mesozoic through the Holocene. These deposits include world-class copper porphyry and skarn deposits as well as a continuum of similar skarn, porphyry, vein, and replacement deposits that contain variable quantities of...
Geometry of sandy deposits at the distal edge of the Mississippi Fan, Gulf of Mexico
D.C. Twichell, W. C. Schwab, Neil H. Kenyon
1995, Book chapter, Atlas of Deep Water Environments
Sidescan sonar provides a map of the seafloor that has greatly improved the understanding of depositional processes on modern deep-sea fans (e.g. Mutti and Normark 1991). Here, we present a sidescan-sonar mosaic from the eastern Gulf of Mexico that images the distal reaches of a channel on the Mississippi Fan...
Sources of the Early Cretaceous plutons in the Turtle and West Riverside Mountains, California
C. M. Allen, J. L. Wooden, Keith A. Howard, D.A. Foster, R. M. Tosdal
1995, Journal of Petrology (36) 1675-1700
Ages and initial isotopic ratios of Early Cretaceous (˜100 Ma) plutons of the Cordilleran Interior in the southern Turtle and West Riverside mountains distinguish them from Late Cretaceous plutons in surrounding ranges in the eastern Mojave Desert. Furthermore, the studied plutons have isotopic and geochemical characteristics more similar to plutons...
Estimates of self-supplied commercial ground-water use in rural east-central Minnesota
L. C. Trotta
1995, Minnesota Ground Water Association Newsletter (13) 8
No abstract available....
Alteration of basalt hyaloclastite at the off-axis Sea Cliff hydrothermal field, Gorda Ridge
R.A. Zierenberg, Peter Schiffmant, I. Jonasson, R. M. Tosdal, W. Pickthorn, J. McClain
1995, Chemical Geology (126) 77-99
The Sea Cliff hydrothermal field on the northern segment of the Gorda Ridge is situated along a rift-bounding normal fault about 2.6 km east of the neovolcanic zone and approximately 300 m above the spreading axis. The structural setting of this hydrothermal field differs from that of most other active...
Strain accumulation across the central Nevada seismic zone, 1973–1994
James C. Savage, Michael Lisowski, W.K. Gross
1995, Journal of Geophysical Research B: Solid Earth (100) 20257-20269
Five trilateration networks extending for 280 km along the central Nevada seismic zone (1915 Pleasant Valley, M = 7.3; 1954 Dixie Valley, M = 6.8; 1954 Stillwater, M = 6.8; 1954 Rainbow Mountain, M = 6.6; 1954 Fairview Peak, M = 7.1; and 1932 Cedar Mountain, M = 7.2) have been surveyed 6 times since 1973 to determine deformation along the zone....
Hydrogeology and ground-water flow of the drift and Platteville aquifer system, St. Louis Park, Minnesota
R. J. Lindgren
1995, Water-Resources Investigations Report 94-4204
Three aquifers and two confining units have been delineated within the drift underlying the area near the site of a former coal-tar distillation and wood-preserving plant in St. Louis Park, Minnesota. The hydrogeologic units of the drift, in descending order, are the upper drift aquifer, the upper drift confining unit,...
Relation of fracture orientation to linear terrain features, anisotropic transmissivity, and seepage to streams in the karst Prairie du Chien Group, southeastern Minnesota
J. F. Ruhl
1995, Water-Resources Investigations Report 94-4146
Ground-water flow in the karst-terrane aquifers of southeastern Minnesota is not well defined. Variable fracture patterns in the bedrock affect permeability. Techniques to predict the effects of fracture patterns on ground-water flow in the karst-terrane aquifers of southeastern Minnesota are unavailable. The use of such techniques may be useful to...
Hydrogeology and simulated effects of ground-water withdrawals for citrus irrigation, Hardee and De Soto counties, Florida
P. A. Metz
1995, Water-Resources Investigations Report 93-4158
The hydrogeology of Hardee and De Soto Counties in west-central Florida was evaluated, and a ground-water flow model was developed to simulate the effects of expected increases in ground-water withdrawals for citrus irrigation on the potentiometric surfaces of the intermediate aquifer system and the Upper Floridan aquifer. In 1988, total...
Structure of the basins and ranges, Southwest New Mexico, an interpretation of seismic velocity sections
Douglas P. Klein, Gerda A. Abrams, Patricia L. Hill
1995, Open-File Report 95-506
This report presents a geologic appraisal of seismic velocity sections that profile a total of 790 km in southwest New Mexico west of Las Cruces and south of Lordsburg and Deming. The present work outlines the contribution of these velocity sections to estimating areas favorable for mineral resource occurrences. Seismic...
