Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2353
Circum-Pacific Conference included the environment
No abstract available.
Authors
E. E. Brabb, T. L. Wright
Stratigraphic contrasts across the San Gregorio fault, Santa Cruz Mountains, west-central California
No abstract available.
Authors
J. C. Clark, E. E. Brabb
Examples of seismic zonation in the San Francisco Bay region
No abstract available.
Authors
W. J. Kockelman, E. E. Brabb
Megalineament in southeastern Alaska marks southwest edge of Coast Range batholithic complex
The Coast Range megalineament is a prominent, nearly continuous topographic and structural feature that extends southeastward about 550 km (330 mi) from its junction with the Chatham Strait – Lynn Canal fault at Point Sherman to Tongass Passage near the mouth of Pearse Canal where it leaves southeastern Alaska. It probably extends still further southeastward into British Columbia along Work Channe
Authors
David A. Brew, A. B. Ford
Preliminary geologic maps of the Chittenden, Los Gatos, and Watsonville East quadrangles, California
No abstract available.
Authors
T. W. Dibblee, Earl E. Brabb
Preliminary geologic map of the Big Delta quadrangle, Alaska
No abstract available.
Authors
Florence R. Weber, H.L. Foster, T. E. Keith, Cynthia Dusel-Bacon
Preliminary geologic map of the Laurel Quadrangle, Santa Cruz and Santa Clara counties, California
No abstract available.
Authors
T.W. Dibblee, E. E. Brabb, Joseph C. Clark
Lithium in the McDermitt caldera, Nevada and Oregon
Anomalously high concentrations of lithium in fluviatile-lacustrine sediments near McDermitt, Nevada, may constitute a potential resource. These sediments are associated with a caldera about 45 km in diameter that is a result of volcanic activity, subsidence and sedimentation chiefly of Miocene age. The sediments originally were vitroclastic and now consist chiefly of authigenic zeolites, clay min
Authors
Richard K. Glanzman, J. H. McCarthy, James J. Rytuba
Distribution and character of upper mesozoic subduction complexes along the west coast of North America
Structurally complex sequences of sedimentary, volcanic, and intrusive igneous rocks characterize a nearly continuous narrow band along the Pacific coast of North America from Baja California, Mexico to southern Alaska. They occur in two modes: (1) as complexly folded but coherent sequences of graywacke and argillite that locally exhibit blueschist-grade metamorphism, and (2) as melanges containin
Authors
D. L. Jones, M. C. Blake, E. H. Bailey, R. J. McLaughlin
Age measurements of potassium-bearing sulfide minerals by the 40Ar/39Ar technique
K-Ar ages have been determined for sulfide minerals for the first time. The occurrence of adequate amounts of potassium-bearing sulfides with ideal compositions K3Fe10S14 (∼10 wt.% K) and KFe2S3 (∼16 wt.% K) in samples from a mafic alkalic diatreme at Coyote Peak, California, prompted an attempt to date these materials. K3Fe10S14, a massive mineral with conchoidal fracture, gives an age of 29.4 ±
Authors
G.K. Czamanske, M. A. Lanphere, Richard C. Erd, M. C. Blake
Regional mineral resource assessment in Alaska, a case history
No abstract available.
Authors
Donald A. Singer, W. D. Menzie, John H. DeYoung
Paleomagnetic evidence for a Late Cretaceous deformation of the Great Valley Sequence, Sacramento Valley, California
Paleomagnetic samples from five localities within the Great Valley sequence range in age from Late Jurassic to Late Cretaceous. All samples possess normal polarity, and alternating-field demagnetization experiments show that the remanence was acquired after the sequence was folded. A mean paleomagnetic pole position determined from 17 demagnetized samples is located at 72° N., 181° E., with the ra
Authors
Edward A. Mankinen