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Geochemical data of fumarolically altered rocks, Valley of Ten Thousand Smokes, Alaska
Terry E. Keith
1995, Open-File Report 95-47
Samples from a fossil fumarole originating in the 1912 ash-flow tuffin the Valley of Ten Thousand Smokes have been analyzed to ascertain chemical changes resulting from high-temperature fumarolic alteration and subsequent cooling and weathering of the protolith. Samples of the underlying, dominantly leached, dacite-rich portion of the ash-flow tuff adjacent...
Hydrologic data for the Fristoe Unit of the Mark Twain National Forest, southern Missouri, 1988-93
Michael J. Kleeschulte, S. J. Sutley
1995, Open-File Report 95-106
Background hydrologic data were collected from 1988 to 1993 in the Fristoe Unit of the Mark Twain National Forest. Water-quality data collected from area streams, springs, and wells were analyzed using trilinear diagrams, stiff diagrams, boxplots, and summary statistics. The water is a calcium- magnesium-bicarbonate type. Streams generally have slightly...
Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in October 1994 : T-131 (trace constituents), T-133 (trace constituents), M-132 (major constituents), N-43 (nutrients), N-44 (nutrients), P-23 (low ionic strength) and Hg-19 (mercury)
H. Keith Long, Jerry W. Farrar
1995, Open-File Report 95-117
This report presents the results of the U.S. Geological Survey's analytical evaluation program for 7 standard reference samples--T-131 (trace constituents), T-133 (trace constituents), M-132 (major constituents), N-43 (nutrients), N-44 (nutrients), P-23 (low ionic strength), and Hg-19 (mercury). The samples were distributed in October 1994 to 131 laboratories registered in the...
Methane in coastal sea water, sea ice, and bottom sediments, Beaufort Sea, Alaska
T.D. Lorenson, Keith A. Kvenvolden
1995, Open-File Report 95-70
This report summarizes data acquired from 1990 to 1994 for the gas-hydrate portion of the USGS project 'Permafrost and gas hydrate as possible sources of methane' of the USGS Global Change and Climate History program. The objective of this project has been to test the hypothesis that gas hydrate deposits...
Dissolved pesticide data for the San Joaquin River at Vernalis and the Sacramento River at Sacramento, California, 1991-94
Dorene E. MacCoy, Kathryn L. Crepeau, Kathryn Kuivila
1995, Open-File Report 95-110
Water samples were collected from sites on the San Joaquin and Sacramento Rivers, California and were analyzed for dissolved organic pesticides. This data collection and analysis are a part of an ongoing project by the U.S. Geological Survey Toxic Contaminants Hydrology program to determine the fate and transport of organic...
Supporting data for hydrologic studies in San Francisco Bay, California: Meteorological measurements at the Port of Redwood City during 1992-1994
Laurence E. Schemel
1995, Open-File Report 95-327
Meteorological data were collected during 1992-94 at the Port of Redwood City, California, to support hydrologic studies in southern San Francisco Bay. The meteorological variables that were measured were air temperature, atmospheric pressure, quantum flux (insolation), and four parameters of wind speed and direction: scalar mean horizontal wind speed, (vector)...
Water-level fluctuations, water temperatures, and tilts in sandbars -6.5R, 43.1L, and 172.3L, Grand Canyon, Arizona, 1990-93
Michael C. Carpenter, Jason A. Crosswhite, R. L. Carruth
1995, Open-File Report 94-485
Rill erosion, slumping, and fissuring develop on seepage faces of many sandbars along the Colorado River in the Grand Canyon at low river stage. Three sandbars were instrumented with sensors for continual monitoring of stage, pore pressure, ground-water temperature, and tilt to determine the relation between ground-water flow and sandbar...
Presence and distribution of nitrate and selected pesticides in surficial-sand aquifers and selected lakes, 1993-94, East Otter Tail County, Minnesota
Shannon E. Smith, James E. Ruhl
1995, Open-File Report 95-116
This report presents selected data collected during the first year (December 1993 to September 1994) of a three year water-quality study of surficial-sand aquifers and selected lakes in east Otter Tail County, Minnesota. The objectives of the study are (1) to determine the presence and distribution of nitrate-nitrogen and selected...