Publications
Browse recent USGS publications related to energy resources.
Filter Total Items: 2846
Factors affecting the recognition of faults exposed in exploratory trenches Factors affecting the recognition of faults exposed in exploratory trenches
Trenching-a widely used method for evaluating fault activity-has limitations that can mislead investigators. Some segments of fault strands in trench walls may not be visible, and this nonvisibility can lead to incorrect interpretations of time of most recent displacement and recurrence intervals on a fault. We examined the logs of 163 trench exposures and tabulated data on more than 1...
Authors
Manuel G. Bonilla, James J. Lienkaemper
Geologic map and structure sections of the Los Gatos 7-1/2' quadrangle, Santa Clara and Santa Cruz Counties, California Geologic map and structure sections of the Los Gatos 7-1/2' quadrangle, Santa Clara and Santa Cruz Counties, California
No abstract available.
Authors
R. J. McLaughlin, J. C. Clark, E. E. Brabb, E. J. Helley
Landform classification of New Mexico by computer Landform classification of New Mexico by computer
No abstract available.
Authors
Richard Dikau, Earl E. Brabb, Robert M. Mark
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. B. Haxel, R.W. Simpson, Keith A. Howard
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. G. Bonilla, James J. Lienkaemper
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 A. Howard, R.W. Simpson, G. B. Haxel
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 A. Howard, J.R. Shannon
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. F. Miller, Keith A. Howard
Estimating potential for small fields in mature petroleum provinces: Discussion Estimating potential for small fields in mature petroleum provinces: Discussion
No abstract available.
Authors
John H. Schuenmeyer, L. J. Drew, David H. Root, Emil D. Attanasi
Geosciences Geosciences
No abstract available.
Authors
Roger D. Borcherdt, N. C. Donovan, D. Eberhart-Phillips, A. Michael, Paul A. Reasenberg, L. Dietz, W. Ellsworth, Daniel J. Ponti, Ray E. Wells, R. A. Haugerud, M. M. Clark, N. T. 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, 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 A. Singer, James D. Bliss