The San Dieguito Complex: A Review and Hypothesis

1967 ◽  
Vol 32 (2) ◽  
pp. 168-185 ◽  
Author(s):  
Claude N. Warren
Keyword(s):  
Great Basin ◽  
Critical Evaluation ◽  
Death Valley ◽  
Lake Mohave

AbstractThe confusing terminology surrounding the San Dieguito complex is reviewed, and a critical evaluation of the content of this complex is undertaken. The San Dieguito complex is redefined and includes Lake Mohave, Death Valley I, and Playa I and II complexes. An age of greater than 6000 B.C. is shown for at least one component of the complex and a date of 7000 to 8000 B.C. is suggested for the complex as a whole.The hypothesis is developed that the San Dieguito complex is distinct from the Desert culture and represents a generalized hunting tradition which moved into the area along a north-south belt in the western Great Basin.

Ediacaran fossils from the southwestern Great Basin, United States

2000 ◽  
Vol 74 (2) ◽  
pp. 349-359 ◽  
Author(s):  
James W. Hagadorn ◽  
Ben Waggoner
Keyword(s):  
United States ◽  
Great Basin ◽  
Southern Africa ◽  
Lower Cambrian ◽  
Trace Fossils ◽  
Death Valley ◽  
Lower Member ◽  
Upper Third

Ediacaran fossils from the southwestern Great Basin may help constrain regional Vendian-Cambrian biostratigraphy and provide biogeographic links between facies in this region and elsewhere. Locally, trace fossils suggest the Vendian-Cambrian boundary occurs within or below the upper third of the lower member of the Wood Canyon Formation. Ediacaran soft-bodied and tubular fossils, including the frondlike fossil Swartpuntia and tubular, mineralized or agglutinated fossils similar to Archaeichnium Cloudina Corumbella, and Onuphionella occur in the lowermost Wood Canyon Formation. Discoidal forms referred to Nimbia occur in both the lowermost Wood Canyon Formation and the underlying strata of the Stirling Quartzite. These fossils occur directly below Lower Cambrian trace fossils, including Treptichnus pedum, and confirm the persistence of the Ediacaran biota to near the base of the Cambrian. These faunas may also help strengthen previously proposed correlation schemes between the two main facies belts of the southwestern Great Basin (the Death Valley and White-Inyo facies), because a nearly identical Vendian-lowest Cambrian succession of faunas occurs in both regions. Lastly, lack of cosmopolitan Ediacaran faunas in these strata suggests a paleobiogeographic link between the southwestern U.S. and southern Africa in Vendian time.

Structure of the central Death Valley pull-apart basin and vicinity from COCORP profiles in the southern Great Basin

1988 ◽  
Vol 100 (9) ◽  
pp. 1437-1450 ◽  
Author(s):  
LAURA SERPA ◽  
BEATRICE DE VOOGD ◽  
LAUREN WRIGHT ◽  
JAMES WILLEMIN ◽  
JACK OLIVER ◽  
...  
Keyword(s):  
Great Basin ◽  
Death Valley ◽  
Pull Apart Basin

Implements from Lake Mohave

1938 ◽  
Vol 4 (2) ◽  
pp. 154-155
Author(s):  
Robert McCormick Adams
Keyword(s):  
Late Pleistocene ◽  
Death Valley ◽  
Lake Mohave ◽  
Vertical Elevation ◽  
Lake Beds

Archaeological reconnaisance work along the ancient shore lines of desiccated Lake Mohave, located south of Death Valley in California, has been interpreted by Mr. and Mrs. Campbell and their associates. Groups of implements were found along the old beach line located above the present playa. These were found at approximately the same vertical elevation. Most geologists, including D. G. Thompson, O. E. Meinzer, and E. Antevs, are concurrent in the belief that the desiccation of this lake took place in late Pleistocene times; although Thompson believes the antiquity to be uncertain. The age of the lake, together with neighboring lake beds which are also desiccated, was interpreted by geologists before archaeologists became interested in the problem; however, it is possible that the groups of implements found exposed in the beaches might be considerably younger than the Pleistocene phase of the lake's existence. The presence of modern camp sites containing materials typologically different than those mentioned above was determined at the southern portion of the lake near existing or recent springs.

A Cache of Unfired Clay Objects from Death Valley, California

1965 ◽  
Vol 30 (4) ◽  
pp. 434-441 ◽  
Author(s):  
William J. Wallace
Keyword(s):  
19Th Century ◽  
Great Basin ◽  
Death Valley ◽  
Archaeological Sites ◽  
National Monument ◽  
To Come ◽  
The 19Th Century

AbstractAn unusual cache of unfired-clay basketry effigies and human figurines was uncovered by a windstorm near Stovepipe Wells in Death Valley National Monument. These specimens and others from nearby archaeological sites demonstrate a more extensive use of sun-dried articles in the Death Valley region than hitherto suspected. The unbaked-clay industry appears to come into the area by way of the Great Basin extension of Anasazi culture aroundA.D.900-1100 and to have persisted into the second half of the 19th century.

Death Valley bright spot: A midcrustal magma body in the southern Great Basin, California?

Geology ◽  
1986 ◽  
Vol 14 (1) ◽  
pp. 64 ◽  
Author(s):  
Beatrice de Voogd ◽  
Laura Serpa ◽  
Larry Brown ◽  
Ernest Hauser ◽  
Sidney Kaufman ◽  
...  
Keyword(s):  
Great Basin ◽  
Death Valley ◽  
Bright Spot ◽  
Magma Body

Electron Microscopy of Metal-Matrix Composites

1970 ◽  
Vol 28 ◽  
pp. 404-405
Author(s):  
A. Lawley ◽  
M. R. Pinnel ◽  
A. Pattnaik
Keyword(s):  
Electron Microscopy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Critical Evaluation ◽  
Elastic Behavior ◽  
Matrix Composites ◽  
Directionally Solidified ◽  
Fracture Characteristics ◽  
Broad Program

As part of a broad program on composite materials, the role of the interface on the micromechanics of deformation of metal-matrix composites is being studied. The approach is to correlate elastic behavior, micro and macroyielding, flow, and fracture behavior with associated structural detail (dislocation substructure, fracture characteristics) and stress-state. This provides an understanding of the mode of deformation from an atomistic viewpoint; a critical evaluation can then be made of existing models of composite behavior based on continuum mechanics. This paper covers the electron microscopy (transmission, fractography, scanning microscopy) of two distinct forms of composite material: conventional fiber-reinforced (aluminum-stainless steel) and directionally solidified eutectic alloys (aluminum-copper). In the former, the interface is in the form of a compound and/or solid solution whereas in directionally solidified alloys, the interface consists of a precise crystallographic boundary between the two constituents of the eutectic.

Estimating the slip rates of normal faults in the Great Basin, USA

2000 ◽  
Vol 12 (3-4) ◽  
pp. 227-240 ◽  
Author(s):  
C. M. dePolo ◽  
J. G. Anderson
Keyword(s):  
Great Basin ◽  
Normal Faults ◽  
Slip Rates
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