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Sample catalog for core CL-80-1, Clear Lake, Lake County, California
Michael J. Rymer, John D. Sims, Charles W. Hedel, W.D. Bridge, R.S. Makdisi, G.A. Mannshardt
1981, Open-File Report 81-245
A 177-m-long core designated CL-80-1 was taken from Clear Lake, Calif., during July and August, 1980, at latitude 39.08°N, longitude 122.84°W (fig. 1). The core was removed from Clear Lake for interdisciplinary studies and regional correlation of paleoclimates, paleoecologies, paleolimnology, Quaternary dating techniques, and frequency of volcanic eruptions. This catalog...
Research in the Geysers-Clear Lake geothermal area, Northern California
Robert J. McLaughlin, Julie M. Donnelly-Nolan, editor(s)
1981, Professional Paper 1141
The Geysers-Clear Lake area is one of two places in the world where major vapor-dominated hydrothermal reservoirs are commercially exploited for electric power production. Because energy can be extracted more efficiently from steam than from hot water, vapor-dominated systems are preferable for electric power generation, although most geothermal electric power...
Surface geology of the Jeptha Knob cryptoexplosion structure, Shelby County, Kentucky
Earle Rupert Cressman
1981, Professional Paper 1151-B
The Jeptha Knob crytoexplosion structure, described by Bucher in 1925, was remapped in 1973 as part of the U.S. Geological Survey and the Kentucky Geological Survey cooperative mapping program. The knob is in the western part of the Blue Grass region. Hilltops in the rolling farmland adjacent to the knob...
The Accotink Schist, Lake Barcroft Metasandstone, and Popes Head Formation— Keys to an understanding of the tectonic evolution of the northern Virginia Piedmont
Avery Ala Drake, Peter T. Lyttle
1981, Professional Paper 1205
The newly named Accotink Schist and Lake Barcroft Metasandstone of the Eastern Fairfax sequence are the structurally lowest metamorphic rocks in the northernmost Piedmont of Virginia. The Accotink consists of beds of pelitic schist that have thin basal intervals containing graded, very fine grained metasiltstone, as well as interbeds of...
Landslides from the February 4, 1976, Guatemala earthquake
Edwin L. Harp, Raymond C. Wilson, Gerald F. Wieczorek
1981, Professional Paper 1204-A
The M (Richter magnitude) = 7.5 Guatemala earthquake of February 4, 1976, generated more than 10,000 landslides throughout an area of approximately 16,000 km2. These landslides caused hundreds of fatalities as well as extensive property damage. Landslides disrupted both highways and the railroad system and thus severely hindered early rescue...