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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 53 (1969)

Issue: 2. (February)

First Page: 457

Last Page: 458

Title: Pleistocene Sea-Level Fluctuations off Southern California and Their Relation to Continental Slope Sedimentation: ABSTRACT

Author(s): Robert F. Dill

Article Type: Meeting abstract

Abstract:

Fluctuations of sea level as much as 700 ft during the late Pleistocene have modified the continental margin of southern California and exercised a dominant control on the offshore sediment-distribution patterns. Narrow terraces and low sea cliffs were cut into bedrock during lowered sea stands. They are associated with anomalous occurrences of sand-algal nodules, concentrates of shallow-water shells, phosphorite, and rounded cobbles of mixed rock type. The rock outcrops exposed in the low sea cliffs provide a window that permits sampling and the mapping of bedrock

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structures from submersibles in an area normally covered with prograding slope deposits. The concentration of relict shallow-water fossils in deep terrace zones and the rough topography can be confused with nonexistent structural features if not recognized during sampling programs.

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Copyright 1997 American Association of Petroleum Geologists