Publications
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Sedimentology, behavior, and hazards of debris flows at Mount Rainier, Washington
Mount Rainier is potentially the most dangerous volcano in the Cascade Range because of its great height, frequent earthquakes, active hydrothermal system, and extensive glacier mantle. Many debris flows and their distal phases have inundated areas far from the volcano during postglacial time. Two types of debris flows, cohesive and noncohesive, have radically different behavior that relates empir
Authors
Kevin M. Scott, Patrick T. Pringle, J.W. Vallance
A postulated new source for the White River Ash, Alaska: A section in Geologic studies in Alaska by the US. Geological Survey, 1990
The White River Ash (Lerbekmo and others, 1968), product of two of the most voluminous pyroclastic eruptions in North America in the past 2,000 yr, blankets much of the Yukon Terrtory, Canada, and a small part of adjoining eastern Alaska. Lerbekmo and Campbell (1969) narrowed the source of the ash to an area northeast of the Mt. Bona-Mt. Churchill massif in the St. Elias Mountains of southern Alas
Authors
Robert G. McGimsey, Donald H. Richter, Gregory D. DuBois, T. P. Miller
Geomorphic response to the 1989-90 eruptions of Redoubt Volcano, Alaska
No abstract available.
Authors
J.M. Dorava
Sonar monitoring of gravel-transport processes at a stream-gaging station in a disturbed watershed [abs.]
No abstract available.
Authors
R.L. Dinehart
Rustler Park quadrangle, Cochise County, Arizona— Analytical data and geologic sample catalog
No abstract available.
Authors
Edward A. du Bray, Douglas B. Yager, John S. Pallister
Chemistry of the subalkalic silicic obsidians
Nonhydrated obsidians are quenched magmatic liquids that record in their chemical compositions details of the tectonic environment of formation and of the differentiation mechanisms that affected their subsequent evolution. This study attempts to analyze, in terms of geologic processes, the compositional variations in the subalkalic silicic obsidians (Si02≥70 percent by weight, molecular (Na2O+K20
Authors
Ray MacDonald, Robert L. Smith, John E. Thomas
Volcano growth and evolution of the island of Hawaii
The seven volcanoes comprising the island of Hawaii and its submarine base are, in order of growth, Mahukona, Kohala, Mauna Kea, Hualalai, Mauna Loa, Kilauea, and Loihi. The first four have completed their shield-building stage, and the timing of this event can be determined from the depth of the slope break associated with the end of shield building, calibrated using the ages and depths of a seri
Authors
James G. Moore, David A. Clague
Water, CO2, Cl, and F in melt inclusions in phenocrysts from three Holocene explosive eruptions, Crater Lake, Oregon
Rare melt inclusions ~ 100 μm in diameter trapped near the boundaries of corroded patchy zones in plagioclase phenocrysts from Plinian pumice of three Holocene eruptions were analyzed by IR spectroscopy for molecular H2O, OH groups, and CO2and by electron microprobe for Cl and F. The three rhyodacitic eruptions, each of which began with a Plinian phase, occurred over ~200 yr. The Llao Rock and Cle
Authors
C. R. Bacon, Sally Newman, E. Stolper
A glacier peak and Mount Saint Helens J volcanic ash couplet and the timing of deglaciation in the Colville Valley area, Washington
A Late Pleistocene volcanic ash couplet consisting of a Glacier Peak ash layer and an underlying Mount Saint Helens J ash layer has been identified at three sites in the Colville Valley area of northeastern Washington. This ash couplet has been reported as far east as northwestern Montana and therefore appears to have widespread distribution south of the International Boundary. Because areas cover
Authors
P. E. Carrara, D.A. Trimble
Preliminary geologic map of the Cold Bay and False Pass quadrangles, Alaska Peninsula
This map of the Cold Bay and False Pass 1:250,000-scale quadrangles on the Alaska Peninsula is a compilation based in part on the mapping conducted as part of the Alaska Mineral Resource Assessment Program (AMRAP) and the Geothermal Energy Program. Field studies by the authors began as early as 1973 in the quadrangles, but systematic mapping was not begun until 1988. Systematic mapping remains to
Authors
Frederic H. Wilson, Thomas P. Miller, Robert L. Detterman
Garnet/high-silica rhyolite trace element partition coefficients measured by ion microprobe
Garnet/liquid trace element partition coefficients have been measured in situ by ion microprobe in a rhyolite from Monache Mountain, California. Partition coefficients are reported for La, Ce, Nd, Sm, Dy, Er, Yb, Sc, Ti, V, Cr, Sr, Y, and Zr. The in situ analyses avoid the problem of contamination of the garnet phase by trace element-rich accessory minerals encountered in traditional bulk phenocry
Authors
Thomas W. Sisson, Charles R. Bacon
The Pu'u ‘O’o‐Kupaianaha eruption of Kilauea
Kilauea is nearing the 10th year of its most voluminous rift zone eruption in the last 2 centuries. Lava flows have covered 75 km2 to depths as great as 25 m and have added almost 1.2 km2 of new land to the island. These flows have devastated downslope communities and have provided a painful tutorial for local government in planning for and living with volcanic hazards [Heliker and Wright, 1991].
Authors
Christina C. Heliker, Thomas L. Wright