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Page 5563, results 139051 - 139075

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Helicopter airborne electromagnetic survey (using the Dighem II system) of parts of the Lake City caldera, Hinsdale County, Colorado
D.C. Fraser, Z. Dvorak
1980, Open-File Report 80-917
The data presented herein is from an airborne electromagnetic-resistivity-survey conducted by Dighem Limited of Toronto Canada for the U.S. Geological Survey. The area surveyed is located in the western San Juan Mountains near Lake City, Colorado. The general area covered is between 37°45' and 38° latitude north and 107°15' and...
Ground water availability in Acadia National Park and vicinity, Hancock and Knox counties, Maine
Bruce P. Hansen
1980, Open-File Report 80-1050
In general, yield of water from individual wells in unconsolidated surficial deposits is low (0-10 gallons per minute). Several small, unconsolidated deposits may yield moderate quantities (50-100 gallons per minute) but these have not been adequately tested.Yields from 160 wells in the crystalline bedrock range from 0.5 gallons per minute...
Map showing the potentiometric surface of the Aquia Aquifer, May 19-23, 1980
Frank Chapelle, Dave Drummond, Tracey Curley
1980, Open-File Report 81-416
The map is based on water level measurements made May 19-23, 1980. The well network used included 83 wells which have been screened in the Aquia aquifer (Aquia Formation of Paleocene Age). Highest levels of the potentiometric surface, 20 to 35 feet above sea level, were measured near the outcrop...
Preliminary map showing freshwater heads for the Red River Formation, Bighorn Dolomite, and equivalent rocks of Ordovician age in the Northern Great Plains of Montana, North Dakota, South Dakota, and Wyoming
W. Roger Miller, S.A. Strausz
1980, Open-File Report 80-730
A map showing freshwater heads for the Ordovician Red River Formation, Bighorn Dolomite, and equivalent rocks has been prepared as part of a study to determine the water-resources potential of the Mississippian Madison Limestone and associated rocks in the Northern Great Plains of Montana, North and South Dakota, and Wyoming....
Bedrock topography of southwest Iowa
Lyle Sendlein, Jack L. Gilmore
1980, IMAP 1222
The bedrock in Iowa (Hershey, 1969) is generally overlain by unconsolidataed deposits consisting of glacial drift, alluvium, and loess. Loess deposits are most extensive in areas bordering the Missouri River flood plain, attaining a thickness of over 200ft in some places. The total thickness of the unconsolidated sediments ranges from...