Publications
Filter Total Items: 2692
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
ALACARTE user manual
ALACARTE offers a convenient way to compile geologic maps in the computer as spatial databases that can be used to prepare both cartographic images and analytic derivatives.
It is a menu-controlled shell, organized in geologic terms, that provides on-screen control of the program ARC/INFO, a commercial geographic information system (GIS).
Input can be from imported scans, digitizer tracing, or on-
Authors
Carl M. Wentworth, Todd T. Fitzgibbon
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 fault syst
Authors
G. B. Haxel, R. W. Simpson, Keith A. Howard
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
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
Visibility of fault strands in exploratory trenches and timing of rupture events
No abstract available.
Authors
M. G. Bonilla, James J. Lienkaemper
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 ages of 1
Authors
D.A. Foster, T.M. Harrison, C. F. Miller, Keith A. Howard
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
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
Economic implications of petroleum field size distributions
The unprecedented natural gas price increases in the late 1970's and early 1980's allowed a glimpse of part of the in-situ distribution of natural gas fields that had been hidden by economic truncation. Analysis of those discoveries shows the distribution to be characterized by progressively larger numbers of fields as size category declines. This paper demonstrates the effects of economic truncat
Authors
Emil D. Attanasi, Lawrence J. Drew
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, Sn, Nb, W
Authors
Donald A. Singer, James D. Bliss