Publications
Filter Total Items: 1147
Geologic map of the Unionville quadrangle, Pershing County, Nevada
No abstract available.
Authors
R. E. Wallace, D.B. Tatlock, N. J. Silberling, W. P. Irwin
Preliminary geologic map of the Black River quadrangle, east-central Alaska
No abstract available.
Authors
Earl E. Brabb, Michael Churkin
Six new Paleozoic and Mesozoic formations in east-central Alaska
No abstract available.
Authors
Earl E. Brabb
Seismic environment of the Burro Flats site, Ventura County, California: a brief, limited literature review
A limited review of available literature suggests that the maximum horizontal ground acceleration at the Burro Flats site from earthquakes in the region could range from less than 0.1 to 0.49 g. A magnitude 8 earthquake on the nearby San Andreas fault could produce ground acceleration in the range 0.18 to 0.31 g, and an expectable larger earthquake on that fault could produce larger accelerations.
Authors
Carl M. Wentworth, Manuel G. Bonilla, Jane M. Buchanan
Blueschist-facies metamorphism related to regional thrust faulting
Rocks of the blueschist (glaucophane schist) facies occur throughout the world in narrow tectonic belts associated with ultramafic rocks. In the Coast Range province of California, blueschist rocks are devloped in the eugeosynclinal Franciscan Formation of Late Mesozoic age. The blueschist rocks form a narrow belt for more than 800 km along the eastern margin of this province and commonly are sepa
Authors
M. C. Blake, W. P. Irwin, R. G. Coleman
Shatter cones at Sierra Madera, Texas
Shatter cones abound in the central uplift of Sierra Madera and they occur as far as 6.5 kilometers from the center. Apical angles average near 90 degrees. Whole cones and full cones represented by diversely oriented cone segments in any structural block show relatively uniform orientations of axes and a dominant direction of point. The cones predate faulting and folding in the central uplift, and
Authors
Keith A. Howard, Terry W. Offield
Isotopic age of the Nevadan Orogeny and older Plutonic and metamorphic events in the Klamath Mountains, California
Several metamorphic and plutonic events have been recognized in the Klamath Mountains utilizing potassium-argon and rubidium-strontium mineral and whole-rock ages. The oldest known metamorphic event in the region produced the Abrams Mica Schist and the co-extensive Salmon Hornblende Schist. Strontium evolution diagrams indicate that the age of primary metamorphism of the Abrams Mica Schist is appr
Authors
Marvin A. Lanphere, William P. Irwin, Preston E. Hotz
Devonian rocks of the Yukon-Porcupine Rivers area and their tectonic relation to other Devonian sequences in Alaska
Devonian rocks along the Yukon River near the Alaska-Yukon boundary comprise 250 feet of limestone and shale and 800 feet of chert and siliceous shale, all referred to the McCann Hill Chert of Early to Late Devonian age; about 3,000 feet of non-marine chert-pebble conglomerate, graywacke, and shale of the Nation River Formation (Late Devonian); and about 3,000 feet of an unnamed chert and siliceou
Authors
Michael Churkin, Earl E. Brabb
Historic surface faulting in continental United States and adjacent parts of Mexico
This report summarizes geometric aspects of approximately 35 instances of historic faulting of the ground surface in the continental United States and adjacent parts of Mexico. This information is of immediate importance in the selection and evaluation of sites for vital structures such as nuclear power plants. The data are presented in a table and graphs which show the quantitative relations betw
Authors
M. G. Bonilla
Geological Survey research 1967
No abstract available.
By
Water Resources Mission Area, Energy and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Pennsylvania Water Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center