Publications
Filter Total Items: 1154
National Earthquake Hazards Reduction Program, summaries of technical reports; volume XXXIV National Earthquake Hazards Reduction Program, summaries of technical reports; volume XXXIV
No abstract available.
Authors
Muriel L. Jacobson
Bristol Lake basin--a deep sedimentary basin along the Bristol-Danby trough, Mojave Desert Bristol Lake basin--a deep sedimentary basin along the Bristol-Danby trough, Mojave Desert
No abstract available.
Authors
R.C. Jachens, Keith A. Howard
Kinematic evidence for extensional unroofing of the Franciscan Complex along the Coast Range Fault, Northern Diablo Range, California Kinematic evidence for extensional unroofing of the Franciscan Complex along the Coast Range Fault, Northern Diablo Range, California
Franciscan metagraywacke immediately below the Del Puerto ophiolite, an outlier of the Coast Range ophiolite in the northern Diablo Range, was sheared during top‐to‐the‐east displacement on the Coast Range fault. This represents normal faulting and extensional offset. It was accompanied by attenuation of the Coast Range ophiolite and Great Valley sequence in the hanging wall along layer...
Authors
T.A. Harms, A. S. Jayko, M. Clark Blake
530 Ma zircon age for ophiolite from the New England orogen: Oldest rocks known from eastern Australia 530 Ma zircon age for ophiolite from the New England orogen: Oldest rocks known from eastern Australia
New ion microprobe data provide constraints on the timing of formation of ophiolitic rocks in the New England tectonic collage in eastern Australia. Results for analyses of magmatic zircons from plagiogranite of the Weraerai terrane ophiolite at Upper Bingara give a 206pb/238|j ag e Qf 53Q ± 6 Ma (2a). This plagiogranite is the oldest rock from eastern Australia yet identified. Existing...
Authors
J.C. Aitchinson, T. R. Ireland, M. Clark Blake, P.G. Flood
A quantitative link among mineral deposit modeling, geoscience mapping, and exploration-resource assessment A quantitative link among mineral deposit modeling, geoscience mapping, and exploration-resource assessment
No abstract available.
Authors
C. F. Chung, C. W. Jefferson, D.A. Singer
Predicting sizes of undiscovered mineral deposits; an example using mercury deposits in California Predicting sizes of undiscovered mineral deposits; an example using mercury deposits in California
A critical part of the exploration for mineral deposits or of quantitative mineral resource assessments is the estimation of how large undiscoveredeposits might be. Typically, this problem is addressed using grade and tonnage models in which a major source of variation in possible sizes is accounted for by the differences in types of deposits (Cox and Singer, 1986; Mosier and Page, 1988...
Authors
C. F. Chung, Donald A. Singer, W. David Menzie
National Earthquake Hazards Reduction Program, summaries of technical reports; Volume XXXIII National Earthquake Hazards Reduction Program, summaries of technical reports; Volume XXXIII
No abstract available.
Authors
Muriel L. Jacobson
Incorporation and redistribution of locally derived lithic fragments within a pyroclastic flow Incorporation and redistribution of locally derived lithic fragments within a pyroclastic flow
The lower Miocene Peach Springs Tuff exposed in the Newberry Mountains, California, was deposited within a paleovalley trending S65°W. Exposures within the paleovalley contain lithic breccia intercalated with ash-rich ignimbrite. The clast assemblage of the lithic breccias matches the rock types of the paleovalley walls, and therefore the clasts were not derived from a distant eruptive...
Authors
D.C. Buesch
Regional view in the search for kuroko deposits of the Hokuroku District, Japan Regional view in the search for kuroko deposits of the Hokuroku District, Japan
No abstract available.
Authors
Donald A. Singer, Ryoichi Kouda
Introduction to special section on the California-Arizona crustal transect: CACTIS, Part 3 Introduction to special section on the California-Arizona crustal transect: CACTIS, Part 3
The CACTIS (California‐Arizona Crustal Transect Interim Synthesis) workshop in May 1988 brought researchers together in Flagstaff, Arizona, to discuss the geologic evolution and crustal structure of the southern Cordillera between the San Andreas fault in southeastern California and the Colorado Plateau in Arizona [Sass et al., 1988]. The first set of papers resulting from the workshop...
Authors
R.W. Simpson, Keith A. Howard, Gordon B. Haxel
Franciscan Complex, Coast Range ophiolite and Great Valley sequence: Pacheco Pass to Del Puerto Canyon, California Franciscan Complex, Coast Range ophiolite and Great Valley sequence: Pacheco Pass to Del Puerto Canyon, California
This field trip covers part of the Diablo Range and adjacent San Joaquin Valley of central California (Fig. 1 ). The core of the range is made up of rocks of the Franciscan Complex, flanked by Coast Range ophiolite (CRO) and Great Valley sequence (GVS). The Franciscan Complex in this area consists of deformed and metamorphosed sedimentary and volcanic rocks containing fossils of Late...
Authors
Allan P. Bennison, M. Clark Blake, B. F. Cox, William P. Elder, W. G. Ernst, Tekla Harms, T. H. Nilsen
Faulting and seismic activity Faulting and seismic activity
This chapter traces some of the ideas and concepts leading to the current understanding of the process of faulting and earthquake generation, gives examples of engineering geology investigations contributing to that understanding, describes some engineering projects that have been strongly influenced by the process, and suggests needed research. Each of these topics is discussed in...
Authors
Manuel G. Bonilla