Publications
Filter Total Items: 3150
Uranium-Series Ages of Travertines and Timing of the Last Glaciation in the Northern Yellowstone Area, Wyoming-Montana Uranium-Series Ages of Travertines and Timing of the Last Glaciation in the Northern Yellowstone Area, Wyoming-Montana
Uranium-series age determinations by mass spectrometric methods were done for travertines and associated carbonate veins related to clastic deposits of the last glaciation (Pinedale) in the northern Yellowstone area. Dramatic variations in the hydrologic head are inferred from variations in the elevation of travertine deposition with time and are consistent with the expected hydrologic...
Authors
N.C. Sturchio, K. L. Pierce, M.T. Murrell, M.L. Sorey
The observational side of volcanology The observational side of volcanology
[No abstract available]
Authors
David A. Swanson, Hans-Ulrich Schmincke
Eruptive history and petrology of Mount Drum volcano, Wrangell Mountains, Alaska Eruptive history and petrology of Mount Drum volcano, Wrangell Mountains, Alaska
Mount Drum is one of the youngest volcanoes in the subduction-related Wrangell volcanic field (80x200 km) of southcentral Alaska. It lies at the northwest end of a series of large, andesite-dominated shield volcanoes that show a northwesterly progression of age from 26 Ma near the Alaska-Yukon border to about 0.2 Ma at Mount Drum. The volcano was constructed between 750 and 250 ka during...
Authors
D.H. Richter, E. J. Moll-Stalcup, T. P. Miller, M. A. Lanphere, G. B. Dalrymple, R. L. Smith
Giant Hawaiian underwater landslides Giant Hawaiian underwater landslides
No abstract available
Authors
James G. Moore, William R. Normark, Robin T. Holcomb
An updated numerical simulation of the ground-water flow system for the Castle Lake debris dam, Mount St. Helens, Washington, and implications for dam stability against heave An updated numerical simulation of the ground-water flow system for the Castle Lake debris dam, Mount St. Helens, Washington, and implications for dam stability against heave
A numerical simulation of the ground-water flow system in the Castle Lake debris dam, calibrated to data from the 1991 and 1992 water years, was used to estimate factors of safety against heave and internal erosion. The Castle Lake debris dam, 5 miles northwest of the summit of Mount St. Helens, impounds 19,000 acre-ft of water that could pose a flood hazard in the event of a lake...
Authors
Evelyn A. Roeloffs
Water fact sheet; evolution of sediment yield from Mount St. Helens, Washington, 1980-1993 Water fact sheet; evolution of sediment yield from Mount St. Helens, Washington, 1980-1993
The most enduring geological consequence of the eruption of Mount St. Helens, Washington, on May 18, 1980, and the most costly single element in the recovery effort, has been the persistent downstream sedimentation caused by erosion of the approximately 3 cubic kilometers (km3) of sediment deposited on the landscape surrounding the volcano. Most of the sediment was associated with the...
Authors
John E. Costa
Measurements of thermal-water discharge outside Lassen Volcanic National Park, California, 1983-94 Measurements of thermal-water discharge outside Lassen Volcanic National Park, California, 1983-94
No abstract available.
Authors
Michael L. Sorey, Elizabeth M. Colvard, S. E. Ingebritsen
Whole-rock analyses of core samples from the 1967, 1975, 1979 and 1981 drillings of Kilauea Iki lava lake, Hawaii Whole-rock analyses of core samples from the 1967, 1975, 1979 and 1981 drillings of Kilauea Iki lava lake, Hawaii
No abstract available
Authors
Rosalind Tuthill Helz, H.K. Kirschenbaum, J.W. Marinenko, Rachel Qian
Preliminary geomagnetic paleointensities from Long Valley Caldera, California Preliminary geomagnetic paleointensities from Long Valley Caldera, California
Paleointensities are being determined in order to characterize geomagnetic intensity variations during Quaternary time. Because the geomagnetic field acts as a shield against cosmic radiation, its intensity directly affects the production rate of radiocarbon (^C) in the upper atmosphere. Coe and others (1978) showed that the variation in dipole moment during Holocene time is nearly...
Authors
Edward A. Mankinen
A field-trip guide to Yellowstone National Park, Wyoming, Montana, and Idaho: Volcanic, hydrothermal, and glacial activity in the region A field-trip guide to Yellowstone National Park, Wyoming, Montana, and Idaho: Volcanic, hydrothermal, and glacial activity in the region
This field-trip guide was originally prepared for the 7th International Symposium on Water/Rock Interaction (WRI-7) held in July 1992 in Park City, Utah. A large and diversified group of earth scientists and accompanying family members participated in this 3 1/2-day field trip that focused on water/rock interactions over widely ranging temperatures and pressures in the Yellowstone/Grand...
Authors
Robert O. Fournier, R.L. Christiansen, R. A. Hutchinson, K. L. Pierce
Potential effects of the Hawaii Geothermal Project on ground-water resources on the island of Hawaii Potential effects of the Hawaii Geothermal Project on ground-water resources on the island of Hawaii
In 1990, the State of Hawaii proposed the Hawaii Geothermal Project for the development of as much as 500 MW of electric power from the geothermal system in the East Rift Zone of Kilauea Volcano. This report uses data from 31 wells and 8 springs to describe the properties of the ground-water system in and adjacent to the East Rift Zone. Potential effects of this project on ground-water...
Authors
M.L. Sorey, E.M. Colvard