Publications
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Field Trip 9: San Francisco to Point Reyes: Both sides of the San Andreas fault
No abstract available.
Authors
J. C. Clark, Clyde Wahrhaftig, E. E. Brabb
An axial view of a metamorphic core complex: Crustal structure of the Whipple and Chemehuevi Mountains, southeastern California
A 135‐km‐long, NW‐SE trending, seismic refraction/wide‐angle reflection profile provides a unique along‐strike view of the crustal structure of a belt of metamorphic core complexes in southeastern California: the Whipple, Chemehuevi, and Sacramento mountains metamorphic core complexes. Interpretation of the seismic data was done by two‐dimensional forward modeling of travel times and amplitudes. T
Authors
J. M. Wilson, Jill McCarthy, R.A. Johnson, Keith A. Howard
The world landslide problem
Thousands of people may be killed by landslides each year and property damage may be in the tens of billions of dollars, but the techniques for recognizing and coping with landslides are well developed. Landslides are generally more manageable and predictable than earthquakes, volcanic eruptions, and some storms, but only a few countries have taken advantage of this knowledge to reduce landslide h
Authors
E. E. Brabb
Lanthanide element mobility and Sm-Nd systematics in a contact metamorphic zone
No abstract available.
Authors
Brian D. Marshall, Kiyoto Futa
Off-fault ground ruptures in the Santa Cruz Mountains, California: Ridge-top spreading versus tectonic extension during the 1989 Loma Prieta earthquake
The Ms 7.1 Loma Prieta earthquake of 18 October 1989 produced abundant ground ruptures in an 8 by 4 km area along Summit Road and Skyland Ridge in the Santa Cruz Mountains. Predominantly extensional fissures formed a left-stepping, crudely en echelon pattern along ridges of the hanging-wall block southwest of the San Andreas fault, about 12 km northwest of the epicenter. The fissures are subparall
Authors
Daniel J. Ponti, Ray E. Wells
Application of the FINDER system to the search for epithermal vein gold-silver deposits : Kushikino, Japan, a case study
The FINDER system employs geometric probability, Bayesian statistics, and the normal probability density function to integrate spatial and frequency information to produce a map of probabilities of target centers. Target centers can be mineral deposits, alteration associated with mineral deposits, or any other target that can be represented by a regular shape on a two dimensional map. The size, sh
Authors
Donald A. Singer, Ryoichi Kouda
Mineralization patterns in time and space in the Great Basin of Nevada
No abstract available.
Authors
Dennis P. Cox, Steve Ludington, M.G. Sherlock, Donald A. Singer
Neogene rotations and quasicontinuous deformation of the Pacific Northwest continental margin
Paleomagnetically determined rotations about vertical axes of 15 to 12 Ma flows of the Miocene Columbia River Basalt Group of Oregon and Washington decrease smoothly with distance from the plate margin, consistent with a simple physical model for continental deformation that assumes the lithosphere behaves as a thin layer of fluid. The average rate of northward translation of the continental margi
Authors
Philip England, Ray E. Wells
ALACARTE User Interface - AML Code and Demonstration Maps
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
Todd T. Fitzgibbon, Carl M. Wentworth
Alternative natural gas contract and pricing structures and incentives of the LNG industry
Gas conversion to liquefied gas (LNG) and transport by LNG tankers is one option for meeting expanding gas consumption and for gas traded internationally. This paper examines the impact of the traditional gas contract provisions of indefinite pricing, market out price ceilings, and take‐or‐pay requirements on the profitability of LNG projects in the context of markets characterized by price and qu
Authors
Emil D. Attanasi
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 1,200 fault s
Authors
Manuel G. Bonilla, James J. Lienkaemper
Landform classification of New Mexico by computer
No abstract available.
Authors
Richard Dikau, Earl E. Brabb, Robert M. Mark