Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2484
Geologic sketch of the Klamath Mountains and Coast Ranges of northern California and southern Oregon Geologic sketch of the Klamath Mountains and Coast Ranges of northern California and southern Oregon
No abstract available.
Authors
W. P. Irwin, E.W. Wolfe, M.C. Blake, C.G. Cunningham
Gravity anomalies in the Galapagos Islands area Gravity anomalies in the Galapagos Islands area
No abstract available.
Authors
Anthony B. Watts, J. R. Cochran, J. E. Case, S. L. Ryland, Tom Simkin, Keith A. Howard
Report on Circum-Pacific Energy and Mineral Resources Conferences Report on Circum-Pacific Energy and Mineral Resources Conferences
No abstract available.
Authors
M.T. Halbouty, J.F. Mason, E. E. Brabb
K-Ar Age Relations of Granodiorite Emplacement and Tungsten and Gold Mineralization near the Getchell Mine, Humboldt County, Nevada K-Ar Age Relations of Granodiorite Emplacement and Tungsten and Gold Mineralization near the Getchell Mine, Humboldt County, Nevada
A granodiorite stock intrudes complexly folded and thrust-faulted Paleozoic sedimentary rocks in the Osgood Mountains of eastern Humboldt County, Nevada. Within the metamorphic aureole surrounding the pluton, the sedimentary rocks are converted to cordierite hornfels and marble; tungsten-bearing tactites developed along the contacts of the granodiorite. Cutting the granodiorite and...
Authors
Miles L. Silberman, B. R. Berger, Randolph A. Koski
Spring mudflows at Wrightwood, Southern California Spring mudflows at Wrightwood, Southern California
The Wrightwood area in the San Gabriel Mountains of southern California is known as a site of recurring mudflow activity. The community of Wrightwood is built on the coalesced fans of Sheep, Acorn and Heath Creeks, and the fan deposits are probably chiefly of mudflow origin. Historically, mudflows there have been observed in association with three climatic conditions: (1) short period of...
Authors
D. M. Morton, R. H. Campbell
Preparation and use of isopleth maps of landslide deposits Preparation and use of isopleth maps of landslide deposits
Isopleth maps derived from landslide inventory maps generalize and quantify the areal distribution of landslide deposits in contour form and may be uniquely useful for some types of regional planning. The isopleth format permits incorporation of landslide information with other quantified map data in the preparation of slope stability maps. The isopleth map of landslide deposits in San...
Authors
Robert H. Wright, Russell H. Campbell, Tor H. Nilsen
Alaska Alaska
No abstract available.
Authors
E. H. Lathram, Arthur Grantz, D.F. Barnes, David A. Brew, A. Thomas Ovenshine, George Plafker, R. L. Detterman, H.L. Foster, M. Churkin, W. W. Patton, J. M. Hoare, I.L. Tailleur, W. P. Brosge, T. P. Miller, C.L. Sainsbury
Geologic map of the Pickett Peak quadrangle, Trinity County, California Geologic map of the Pickett Peak quadrangle, Trinity County, California
No abstract available.
Authors
William P. Irwin, M. Clark Blake, C. G. Cunningham
Geologic Exploration of Taurus-Littrow: Apollo 17 Landing Site Geologic Exploration of Taurus-Littrow: Apollo 17 Landing Site
Apollo 17 landed in a deep graben valley embaying the mountainous highlands southeast of the Serenitatis basin. Impact-generated breccias underlie the massifs adjacent to the valley, and basalt has flooded and leveled the valley floor. The dark mantle inferred from orbital photographs was not recognized as a discrete unit; the unusually thick regolith of the valley floor contains a...
Authors
W.R. Muehlberger, R. M. Batson, E.A. Cernan, V. L. Freeman, M.H. Haitt, H. E. Holt, Keith A. Howard, K.B. Jackson, V.S. Larson, J.J. Reed, J. J. Rennilson, H.H. Schmitt
Trench exposures across surface fault ruptures associated with the San Fernando earthquake Trench exposures across surface fault ruptures associated with the San Fernando earthquake
No abstract available.
Authors
Manuel G. Bonilla
The Dun Mountain ultramafic belt Permian oceanic crust and upper mantle in New Zealand The Dun Mountain ultramafic belt Permian oceanic crust and upper mantle in New Zealand
Geologic evidence suggests that the Dun Mountain ultramafic belt in New Zealand is the basal part of a Lower Permian ophiolite suite. By analogy with other ophiolite suites, and as a result of marine geophysical studies of the present ocean basins, the ophiolite is believed to represent oceanic crust and upper mantle upon which the Upper Permian Maitai Group was deposited. After this...
Authors
M.C. Blake, C. A. Landis
Current slope-stability studies in the San Francisco Bay region Current slope-stability studies in the San Francisco Bay region
An extensive program of slope-stability studies is presently underway in the San Francisco Bay region, California. Work to date has resulted in the publication of estimates of landslide damage, an estimated-landslide-abundance map of the region, new slope maps prepared by photomechanical processes, photointerpretive maps of landslide, colluvial, and other surficial deposits, and maps of...
Authors
Tor H. Nilsen, Earl E. Brabb