Publications
National Laboratories Program publications.
Filter Total Items: 1080
K-Ar and fission-track ages (dates) of volcanic, intrusive, altered, and metamorphic rocks in the Mohave Mountains area, west-central Arizona K-Ar and fission-track ages (dates) of volcanic, intrusive, altered, and metamorphic rocks in the Mohave Mountains area, west-central Arizona
No abstract available.
Authors
J. K. Nakata, M.A. Pernokas, Keith Howard, J.R. Shannon
Introduction to Special section on the California-Arizona crustal transect: Part I Introduction to Special section on the California-Arizona crustal transect: Part I
No abstract available.
Authors
Keith Howard, R.W. Simpson, G. Haxel
Visibility of fault strands in exploratory trenches and timing of rupture events Visibility of fault strands in exploratory trenches and timing of rupture events
No abstract available.
Authors
M. Bonilla, James J. Lienkaemper
Introduction to special section on the California-Arizona crustal transect: Part II Introduction to special section on the California-Arizona crustal transect: Part II
In May 1988, a multidisciplinary conference was held in Flagstaff, Arizona, to synthesize recent research on the crustal structural and evolution of a transect across the southern Cordillera. This transect extends from the southern Colorado Plateau southwestward across the Arizona Transition Zone, through the Basin and Range province in the Mojave and Sonoran deserts, to the San Andreas...
Authors
G. Haxel, R.W. Simpson, Keith Howard
The 40Ar/39Ar thermochronology of the eastern Mojave Desert, California, and adjacent western Arizona with implications for the evolution of metamorphic core complexes The 40Ar/39Ar thermochronology of the eastern Mojave Desert, California, and adjacent western Arizona with implications for the evolution of metamorphic core complexes
Mesozoic thickening and Cenozoic extension resulted in the juxtaposition of upper and middle crustal rocks in the eastern Mojave Desert, southeastern California and western Arizona. The application of 40Ar/39Ar thermochronology to rocks in this region provides information about the timing and nature of thrusting, plutonism, metamorphism, denudation, and detachment faulting. The 40Ar/39Ar...
Authors
D.A. Foster, T.M. Harrison, C. Miller, Keith Howard
Geosciences Geosciences
No abstract available.
Authors
Roger Borcherdt, N. Donovan, D. Eberhart-Phillips, A. Michael, Paul Reasenberg, L. Dietz, W. Ellsworth, Daniel Ponti, Ray E. Wells, R. A. Haugerud, M. Clark, N. Hall
The San Andreas Fault System, California The San Andreas Fault System, California
Maps of northern and southern California printed on flyleaf inside front cover and on adjacent pages show faults that have had displacement within the past 2 million years. Those that have had displacement within historical time are shown in red. Bands of red tint emphasize zones of historical displacement; bands of orange tint emphasize major faults that have had Quaternary displacement...
By
Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Earthquake Hazards Program, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Earthquake Science Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Program to prepare standard figures for grade-tonnage models on a Macintosh Program to prepare standard figures for grade-tonnage models on a Macintosh
Grade-tonnage models are frequency distributions of deposit tonnage and grades of mineral deposits of a specific type. The program described here allows users to prepare standard figures of grade and tonnage distributions and display the deposit name associated with any of the data points. Titles and scales appropriate for most deposit types are plotted automatically for tonnage, Cu, Ni...
Authors
Donald Singer, James Bliss
Evolution of the Tertiary La Honda basin, central California Evolution of the Tertiary La Honda basin, central California
Tertiary strata of the La Honda basin are exposed in the Santa Cruz Mountains along the central California coast south of San Francisco. The basin fill has a composite thickness of more than 14,500 m and consists of sedimentary and volcanic rocks that in places rest on granitic basement rocks of the Salinia terrane. Paleogene strata are mainly turbidite sandstone and hemipelagic mudstone...
Authors
Richard Stanley
Preliminary maps showing landslide deposits and related features in New Mexico Preliminary maps showing landslide deposits and related features in New Mexico
No abstract available.
Authors
Mauro Cardinali, Fausto Guzzetti, Earl Brabb
By
Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Review of paleomagnetic data from the Klamath Mountains, Blue Mountains, and Sierra Nevada; Implications for paleogeographic reconstructions Review of paleomagnetic data from the Klamath Mountains, Blue Mountains, and Sierra Nevada; Implications for paleogeographic reconstructions
Paleomagnetic studies of the Klamath Mountains, Blue Mountains, Sierra Nevada, and northwestern Nevada pertain mostly to Jurassic and Cretaceous rocks, but some data also are available for Permian and Triassic rocks of the region. Large vertical-axis rotations are indicated for rocks in many of the terranes, but few studies show statistically significant latitudinal displacements. The...
Authors
Edward Mankinen, William P. Irwin