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The AAPG/Datapages Combined Publications Database

Pacific Section of AAPG

Abstract


Structural Geology of the Sacramento Basin: 1992 Pacific Section Annual Convention, 1992
Pages 91-94

Sacramento Valley Lineaments, Identification and Origin

William D. Lynch

Abstract

Alignments and trends of surface features (faults, joints and selected outcrops), subsurface featurees (faults, folds, structural contours and boundaries of large gravity anomalies), visible on geologic and geophysical maps, and lineaments apparent on satellite imagery define a series of sixteen linear features in the Sacramento Valley and its border elements. These lineaments are also coincident with changes in symmetry of major structural features. A series of right-lateral shears, normal to the dominant northwest-southeast structural grain, may have developed during the Neogene, when the Mendocino triple junction migrated northward outboard of the present-day Valley, or the lineaments may have a more ancient origin. Speculation is offered with respect to their origin and possible exploration significance.


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