Publications
Filter Total Items: 7614
Use of longitudinal strain in identifying driving and resisting elements of landslides Use of longitudinal strain in identifying driving and resisting elements of landslides
Observations of deformation at the surfaces of landslides in Utah and Hawaii indicate that the upslope parts of the land-slides have stretched and the downslope parts have shortened parallel with the direction of movement. The maximum displacement of each landslide occurs in a relatively undeformed zone between the zones of shortening and stretching. The pattern of deformation at the...
Authors
R.L. Baum, R. W. Fleming
Crustal structure of accreted terranes in southern Alaska, Chugach Mountains and Copper River Basin, from seismic refraction results Crustal structure of accreted terranes in southern Alaska, Chugach Mountains and Copper River Basin, from seismic refraction results
Seismic refraction data were collected along a 320-km-long "transect' line in southern Alaska, crossing the Prince William, Chugach, Peninsular, and Wrangellia terranes, and along several shorter lines within individual terranes. Velocity structure in the upper crust (less than 9-km depth) differs among the four terranes. In contrast, layers in the middle crust (9- to 25-km depth) in...
Authors
G. S. Fuis, E. L. Ambos, Walter D. Mooney, N.I. Christensen, E. Geist
Uranium and minor-element partitioning in Fe-Ti oxides and zircon from partially melted granodiorite, Crater Lake, Oregon Uranium and minor-element partitioning in Fe-Ti oxides and zircon from partially melted granodiorite, Crater Lake, Oregon
Crystal-liquid partitioning in Fe-Ti oxides and zircon was studied in partially melted granodiorite blocks ejected during the climactic eruption of Mt. Mazama (Crater Lake), Oregon. The blocks, which contain up to 33% rhyolite glass (75 wt% SiO2), are interpreted to be portions of the magma chamber walls that were torn off during eruption. The glass is clear and well homogenized for all...
Authors
T.Z.L. Tourrette, D.S. Burnett, C. R. Bacon
Volcanologic investigations in the Commonwealth of the Northern Mariana Islands, September-October 1990 Volcanologic investigations in the Commonwealth of the Northern Mariana Islands, September-October 1990
U.S. Geological Survey volcanologists examined the ten volcanoes in the active Mariana Arc north of Saipan in May 1992, at the request of the Governor and the Disaster Control Office of the Commonwealth of the Northern Mariana Islands (CNMI). A shallow earthquake swarm on Anatahan in March-April 1990 and reports of possible new fuming on Agrigan in August 1990 had prompted the evacuation...
Authors
Richard B. Moore, R. Y. Koyanagi, M. K. Sako, F. A. Trusdell, George Kojima, R. L. Ellorda, S. K. Zane
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, September 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, September 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, January 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, January 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, November 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, November 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner