Overview of a simple model describing variation of dissolved organic carbon in an upland catchment
Elizabeth W. Boyer, George M. Hornberger, Kenneth E. Bencala, Diane M. McKnight
1996, Ecological Modelling (86) 183-188
Hydrological mechanisms controlling the variation of dissolved organic carbon (DOC) were investigated in the Deer Creek catchment located near Montezuma, CO. Patterns of DOC in streamflow suggested that increased flows through the upper soil horizon during snowmelt are responsible for flushing this DOC-enriched interstitial water to the streams. We examined...
Photogeologic and reconnaissance geologic map of the Rosebud Buttes and Indian Creek quadrangles, Rosebud County, Montana
R. B. Colton, M.S. Ellis, J.L. Klockenbrink, M. A. Grout, E.L. Heffern, P.R. Bierbach
1996, Miscellaneous Field Studies Map 2305
Digital map data, text, and graphical images in support of the 1995 National assessment of United States oil and gas resources
William R. Beeman, Raymond C. Obuch, James D. Brewton
1996, Data Series 35
This CD-ROM contains files in support of the 1995 USGS National assessment of United States oil and gas resources (DDS-30), which was published separately and summarizes the results of a 3-year study of the oil and gas resources of the onshore and state waters of the United States. The study...
Surface-water-quality assessment of the lower Kansas River basin, Kansas and Nebraska: Results of investigations, 1987-90
John O. Helgesen
1996, Water Supply Paper 2451
Analysis of surface-water-quality data has enabled an assessment of water-quality conditions and trends and their relation to human and natural factors in the lower Kansas River basin, Kansas and Nebraska. This basin drains 15,300 square miles of predominantly agricultural land and is one of seven pilot studies completed as part...
Identification of hydraulic conductivity structure in sand and gravel aquifers: Cape Cod data set
J.R. Eggleston, S.A. Rojstaczer, J.J. Peirce
1996, Water Resources Research (32) 1209-1222
This study evaluates commonly used geostatistical methods to assess reproduction of hydraulic conductivity (K) structure and sensitivity under limiting amounts of data. Extensive conductivity measurements from the Cape Cod sand and gravel aquifer are used to evaluate two geostatistical estimation methods, conditional mean as an estimate and ordinary kriging, and...
Recent introduction of the foraminifer Trochammina hadai Uchio into San Francisco Bay, California, USA
Mary McGann, Doris Sloan
1996, Marine Micropaleontology (28) 1-3
No abstract available....
GSMCAD a new computer program that combines the functions of the GSMAP and GSMEDIT programs and is compatible with Microsoft Windows and ARC/INFO
Van S. Williams, Gary I. Selner, Richard B. Taylor
1996, Open-File Report 96-7
Distribution, facies, ages, and proposed tectonic associations of regionally metamorphosed rocks in Southwestern Alaska and the Alaska Peninsula
Cynthia Dusel-Bacon, Elizabeth O. Doyle, Stephen E. Box
1996, Professional Paper 1497-B
The oldest dated metamorphic sequence in Alaska, the fault-bounded Kilbuck Terrane, consists of continental rocks that were metamorphosed under amphibolite-facies conditions during early Proterozoic (1.77 Ga) time. Proterozoic or early Paleozoic metamorphic ages are also possible for greenschist- and amphibolite-facies continental rocks in interior Alaska (Ruby and Nixon Fork terranes)....
Metamorphic facies map of southeastern Alaska: Distribution, facies, and ages of regionally metamorphosed rocks
Cynthia Dusel-Bacon, D. A. Brew, S. L. Douglass
1996, Professional Paper 1497-D
Nearly all of the bedrock in Southeastern Alaska has been metamorphosed, much of it under medium-grade conditions during metamorphic episodes that were associated with widespread plutonism. The oldest metamorphisms affected probable arc rocks near southern Prince of Wales Island and occurred during early and middle Paleozoic orogenies. The predominant period...
Summary of the Snake River plain Regional Aquifer-System Analysis in Idaho and eastern Oregon
G. F. Lindholm
1996, Professional Paper 1408-A
Regional aquifers underlying the 15,600-square-mile Snake River Plain in southern Idaho and eastern Oregon was studied as part of the U.S. Geological Survey's Regional Aquifer-System Analysis program. The largest and most productive aquifers in the Snake River Plain are composed of Quaternary basalt of the Snake River Group, which underlies...
Magmatic infiltration and melting in the lower crust and upper mantle beneath the Cima volcanic field, California
H. G. Wilshire, A. V. McGuire
1996, Contributions to Mineralogy and Petrology (123) 358-374
Xenoliths of lower crustal and upper mantle rocks from the Cima volcanic field (CVF) commonly contain glass pockets, veins, and planar trains of glass and/or fluid inclusions in primary minerals. Glass pockets occupy spaces formerly occupied by primary minerals of the host rocks, but there is a general lack of...
Episodic acidification of small streams in the northeastern United States: Ionic controls of episodes
P.J. Wigington Jr., David R. DeWalle, Peter S. Murdoch, W.A. Kretser, H. A. Simonin, J. Van Sickle, J.P. Baker
1996, Ecological Applications (6) 389-407
As part of the Episodic Response Project (ERP), we intensively monitored discharge and stream chemistry of 13 streams located in the Northern Appalachian region of Pennsylvania and in the Catskill and Adirondack Mountains of New York from fall 1988 to spring 1990. The ERP clearly documented the occurrence of acidic...
Photogeologic and reconnaissance geologic map of the Griffin Coulee and Griffin Coulee SW quadrangles, Rosebud and Treasure counties, Montana
R. B. Colton, M.S. Ellis, D. A. Coates, E.L. Heffern, J.L. Klockenbrink, M. A. Grout
1996, Miscellaneous Field Studies Map 2302
Photogeologic and reconnaissance geologic map of the Smith Creek and Smith Creek NE quadrangles, Rosebud County, Montana
R. B. Colton, J.L. Klockenbrink, M.S. Ellis, M. A. Grout, E.L. Heffern
1996, Miscellaneous Field Studies Map 2301
Photogeologic and reconnaissance geologic map of the Mitchell Coulee and Crain Place quadrangles, Rosebud County, Montana
R. B. Colton, M.S. Ellis, J.L. Klockenbrink, M. A. Grout, E.L. Heffern
1996, Miscellaneous Field Studies Map 2303
Geologic processes at the land surface
Howard Gordon Wilshire, K. A. Howard, C. M. Wentworth, Helen Gibbons
1996, Bulletin 2149
Stratigraphy and tectonic implications of Upper Cretaceous rocks in the Powder River basin, northeastern Wyoming and southeastern Montana
E.A. Merewether
1996, Bulletin 1917-T
Geologic map of the Banta Ridge Quadrangle, Rio Blanco County, Colorado
M. P. Pantea, L.J. Schmitt
1996, Miscellaneous Field Studies Map 2308
The Slumgullion earth flow: A large-scale natural laboratory
William Z. Savage
David J. Varnes, editor(s)
1996, Bulletin 2130
No abstract available....
Tabular data, text, and graphical images in support of the 1995 National assessment of United States oil and gas resources
Ronald R. Charpentier, T. R. Klett, R. C. Obuch, J. D. Brewton
1996, Data Series 36
This CD-ROM contains files in support of the 1995 USGS National assessment of United States oil and gas resources (DDS-30), which was published separately and summarizes the results of a 3-year study of the oil and gas resources of the onshore and state waters of the United States. The study...
An accounting system for water and consumptive use along the Colorado River, Hoover Dam to Mexico
Sandra J. Owen-Joyce, Lee H. Raymond
1996, Water Supply Paper 2407
An accounting system for estimating and distributing consumptive use of water by vegetation to water users was developed for the Colorado River to meet the requirements of a U.S. Supreme Court decree and used with data from calendar year 1984. The system is based on a water-budget method to estimate...
Chemical evaluation of soil-solution in acid forest soils
G.B. Lawrence, Mark B. David
1996, Soil Science (161) 298-313
Soil-solution chemistry is commonly studied in forests through the use of soil lysimeters.This approach is impractical for regional survey studies, however, because lysimeter installation and operation is expensive and time consuming. To address these problems, a new technique was developed to compare soil-solution chemistry among red spruce stands in New...
Suspended-sediment characteristics of Indiana streams, 1952-84
Charles G. Crawford, Lawrence J. Mansue
1996, Water Supply Paper 2404
Suspended-sediment concentration and discharge data were collected at 7 daily record stations and 70 partial-record stations during 1952- 84. Median suspended-sediment concentrations ranged from 24 to 61 milligrams per liter at daily record stations; concentrations ranged from 6 to 539 milligrams per liter at partial-record stations. Most suspended sediment transported...
Episodic acidification of small streams in the northeastern United States: Fish mortality in field bioassays
J. Van Sickle, J.P. Baker, H. A. Simonin, Barry P. Baldigo, W.A. Kretser, W.E. Sharpe
1996, Ecological Applications (6) 408-421
In situ bioassays were performed as part of the Episodic Response Project, to evaluate the effects of episodic stream acidification on mortality of brook trout (Salvelinus fontinalis) and forage fish species. We report the results of 122 bioassays in 13 streams of the three study regions: the Adirondack mountains of...
Pre-1980 tephra-fall deposits erupted from Mount St. Helens, Washington
Donal R. Mullineaux
1996, Professional Paper 1563
More than 100 tephra-fall deposits erupted from Mount St. Helens within about the last 40,000 years are grouped into tephra sets and layers distinguished from each other chiefly by differences in mineral composition and age. The tephra deposits record a complex history of the volcano, form important time-stratigraphic markers, and...
