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Chemical data and lead isotopic compositions of geochemical baseline samples from streambed sediments and smelter slag, lead isotopic compositions in fluvial tailings, and dendrochronology results from the Boulder River watershed, Jefferson County, Montana
Daniel M. Unruh, David L. Fey, Stan E. Church
2000, Open-File Report 2000-38
IntroductionAs a part of the U.S. Geological Survey Abandoned Mine Lands Initiative, metal-mining related wastes in the Boulder River study area in northern Jefferson County, Montana, have been evaluated for their environmental effects. The study area includes a 24-km segment of the Boulder River in and around Basin, Montana and...
High resolution, low altitude aeromagnetic and electromagnetic survey of Mt Rainier
V. L. Rystrom, Carol A. Finn, Maryla Deszcz-Pan
2000, Open-File Report 2000-27
In October 1996, the USGS conducted a high resolution airborne magnetic and electromagnetic survey in order to discern through-going sections of exposed altered rocks and those obscured beneath snow, vegetation and surficial unaltered rocks. Hydrothermally altered rocks weaken volcanic edifices, creating the potential for catastrophic sector collapses and ensuing formation...
Bibliography of literature from 1990-1997 pertaining to Holocene and fumarolic Pleistocene volcanoes of Alaska, Canada, and the conterminous United States
Christopher J. Harpel, John W. Ewert
2000, Open-File Report 2000-17
The 1980's and 1990's were marked by frequent worldwide destructive volcanic eruptions. Significant loss of life and property during eruptions, and extensive media coverage of volcanic events around the globe have brought volcanic processes and hazards increasingly to the forefront of scientific, governmental, and public attention (e.g., Casadevall, 1994; Pringle, 1994). A result of...
Bathymetric, geophysical and geologic sample data from Medicine Lake, Siskiyou County, northern California
Jonathan R. Childs, J. B. Lowenstern, R. L. Phillips, P. E. Hart, J. J. Rytuba, J. A. Barron, S. W. Starratt, Sarah Spaulding
2000, Open-File Report 00-043
In September, 1999, the U.S. Geological Survey acquired high-resolution bathymetry, seismic reflection profiles, and geologic sample data from Medicine Lake, a high altitude (2,036 m) lake located within the summit caldera/basin at Medicine Lake volcano (MLV), a dormant Quaternary shield volcano located in the Cascade Range, 50 km northeast of...