Publications
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Is Glacier Peak a dangerous volcano? Is Glacier Peak a dangerous volcano?
No abstract available
Authors
L.G. Mastin, R. B. Waitt
Bench mark descriptions and photographs for global positioning system (GPS) stations in the vicinity of Mt. Shasta and Medicine Lake, California Bench mark descriptions and photographs for global positioning system (GPS) stations in the vicinity of Mt. Shasta and Medicine Lake, California
No abstract available.
Authors
K.M. Yamashita, D.E. Wieprecht
Volcano hazards from Mount Rainier, Washington Volcano hazards from Mount Rainier, Washington
Mount Rainier—at 4393 meters (14,410 feet) the highest peak in the Cascade Range—is a dormant volcano whose load of glacier ice exceeds that of any other mountain in the conterminous United States. This tremendous mass of rock and ice, in combination with great topographic relief, poses a variety of geologic hazards, both during inevitable future eruptions and during the intervening...
Authors
R. Hoblitt, J. S. Walder, C. L. Driedger, K. M. Scott, P. T. Pringle, J.W. Vallance
Radiocarbon ages of pre-bomb clams and the hard-water effect in Lakes Michigan and Huron Radiocarbon ages of pre-bomb clams and the hard-water effect in Lakes Michigan and Huron
Five radiocarbon ages, all determined by accelerator mass spectrometry, have been obtained for two pre-bomb bivalves from Lake Michigan and one from Lake Huron. After correcting those ages for the fractionation of14C in calcite and for the radioactively inert CO2 in the atmosphere, we find residual ages, caused by the hard water effect, of about 250 years for Lake Michigan and 440 years...
Authors
David K. Rea, Steven M. Colman
Geological mapping of biological habitats on Georges Bank and Stellwaen Bank, Gulf of Maine region Geological mapping of biological habitats on Georges Bank and Stellwaen Bank, Gulf of Maine region
No abstract available.
Authors
Page C. Valentine, Eric A. Schmuck
Velocities of southern Basin and Range xenoliths: Insights on the nature of lower crustal reflectivity and composition Velocities of southern Basin and Range xenoliths: Insights on the nature of lower crustal reflectivity and composition
To reconcile differences between the assessments of crustal composition in the southern Basin and Range province on the basis of seismic refraction and reflection data and lower-crustal xenoliths, we measured velocities of xenoliths from the Cima volcanic field in southern California. Lower-crustal samples studied included gabbro, microgabbro, and pyroxenite. We find that the mafic...
Authors
Thomas E. Parsons, Nikolas I. Christensen, Howard G. Wilshire
Stratigraphic and palaeoenvironmental summary of the south-east Georgia embayment: a correlation of exploratory wells Stratigraphic and palaeoenvironmental summary of the south-east Georgia embayment: a correlation of exploratory wells
A Continental Offshore Stratigraphic Test (COST) well and six exploratory wells have been drilled in the south-east Georgia embayment. The oldest rocks penetrated are weakly metamorphosed Lower Ordovician quartz arenites and Silurian shales and argillites in the Transco 1005-1 well and Upper Devonian argillites in the COST GE-1 well. These marine strata, which are equivalent to the...
Authors
Lawrence J. Poppe, Peter Popenoe, C. Wylie Poag, B. Ann Swift
Experimental studies of deposition at a debris-flow flume Experimental studies of deposition at a debris-flow flume
Geologists commonly infer the flow conditions and the physical properties of debris flows from the sedimentologic, stratigraphic, and morphologic characteristics of their deposits. However, such inferences commonly lack corroboration by direct observation because the capricious nature of debris flows makes systematic observation and measurement of natural events both difficult and...
Authors
Jon J. Major
Some fluid-inclusion measurements for geothermal drill holes in California, Nevada, El Salvador, and Russia Some fluid-inclusion measurements for geothermal drill holes in California, Nevada, El Salvador, and Russia
The purpose of this report is to make available fluid-inclusion information from drill holes in five geothermal areas: The Geysers and Long Valley caldera in northern California; Steamboat Springs, Nevada; the Ahuachapan field of El Salvador, Central America; and the Mutnovsky geothermal field, Kamchatka Peninsula, Russia. These data were produced at the request of various individuals to...
Authors
Keith E. Bargar
Silver and other tracers of sewage particles in coastal and deep sea sediments off the east coast, USA Silver and other tracers of sewage particles in coastal and deep sea sediments off the east coast, USA
No abstract available.
Authors
Michael H. Bothner, Marilyn R. Buchholtz ten Brink, G.E. Ravizza
Exploring storm surge Exploring storm surge
This video provides a thorough discussion of storm surge, one of the most dangerous elements of hurricanes and major storms. This video illustrates basic storm surge principles, shows actual footage of storm surge damage and relates high-water level data collection by the U.S. Geological Survey to the task of recreating the storm surge event.
Authors
A. B. Tihansky, A. D. Duerr