Transverse ranges and neotectonics of southern California
The Transverse Ranges and the east-trending folds and reverse faults that elevate them began forming in mid-Pleistocene time by regional north-south crustal shortening. The adjacent Mojave Desert and Basin and Range provinces continue to respond to this regional strain by east-west crustal extension. Before {approximately}5 Ma the regional structure was characterized by conjugate northwest-trending right-slip faults (San Andreas set) and northeast-trending left-slip faults (Garlock set). Thereafter, the San Andreas set of faults became simple shears separating the North American and Pacific plates. With the mid-Pleistocene inception of the Transverse Ranges, the San Andreas fault deviated from its N40{degree} - 45{degree}W trend in short N75{degree}W-trending segments on the north and south sides of these mountains in response to the new, and local, strain system of upward crustal extension.
- OSTI ID:
- 6314743
- Journal Information:
- Geology; (USA), Journal Name: Geology; (USA) Vol. 18:1; ISSN GLGYB; ISSN 0091-7613
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
580000* -- Geosciences
ARID LANDS
CALIFORNIA
CENOZOIC ERA
DEFORMATION
DESERTS
FEDERAL REGION IX
GEOLOGIC AGES
GEOLOGIC FAULTS
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
MOUNTAINS
NORTH AMERICA
PLEISTOCENE EPOCH
QUATERNARY PERIOD
STRAINS
STRESS ANALYSIS
TECTONICS
USA
VALLEYS