Publications
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Sampling design for spatially distributed hydrogeologic and environmental processes
A methodology for the design of sampling networks over space is proposed. The methodology is based on spatial random field representations of nonhomogeneous natural processes, and on optimal spatial estimation techniques. One of the most important results of random field theory for physical sciences is its rationalization of correlations in spatial variability of natural processes. This correlatio
Authors
G. Christakos, Ricardo A. Olea
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 vent. Flow
Authors
D.C. Buesch
Regional view in the search for kuroko deposits of the Hokuroku District, Japan
No abstract available.
Authors
Donald A. Singer, Ryoichi Kouda
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; Bliss, 19
Authors
C. F. Chung, Donald A. Singer, W. David Menzie
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
National Earthquake Hazards Reduction Program, summaries of technical reports; Volume XXXIII
No abstract available.
Authors
Muriel L. Jacobson
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 appeared in
Authors
R. W. Simpson, Keith A. Howard, Gordon B. Haxel
A reinterpretation of the timing, position, and significance of part of the Sacramento Mountains detachment fault, southeastern California
A contact previously considered to be part of the Sacramento Mountains detachment fault (SDF), exposed in the Sacramento Mountains metamorphic core complex, is reinterpreted as an unconformity between Tertiary rhyolite of Eagle Peak and cataclastically deformed crystalline lower-plate rocks. This reinterpretation is based on outcrop-scale topographic relief and the absence of deformation along the
Authors
Carol Simpson, Janet Schweitzer, Keith A. Howard
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 sequence.The un
Authors
Manuel G. Bonilla
The Marina District, San Francisco, California: Geology, history, and earthquake effects
A northwest-trending valley in the bedrock surface is buried by firm Pleistocene bay clay, a dense Pleistocene sand layer, soft Holocene bay sediments, loose to dense Holocene beach and dune sands, and artificial fill that have an aggregate maximum thickness of about 90 m (300 ft). Artificial filling of a cove at the site of The Marina District proceeded gradually from the late 1860s to 1912, when
Authors
Manuel G. Bonilla
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 Jurassic to L
Authors
Allan P. Bennison, M. Clark Blake, B. F. Cox, William P. Elder, W. G. Ernst, Tekla Harms, T. H. Nilsen