publication . Article . 1998

Late Pleistocene channel–levee development on Monterey submarine fan, central California

William R. Normark;
Open Access
  • Published: 01 Sep 1998
Abstract
Much of the modern upper (proximal) Monterey fan is a channel–levee complex, the Upper Turbidite Sequence (UTS), that was deeply eroded after the channel breached a volcanic ridge to reach a deeper base level. Ages of sediment samples collected with the ALVIN submersible from the deepest outcrop within the channel–levee system, 390 m below the adjacent western levee crest, indicate that the UTS deposits accumulated at ≥1 m ka−1 during the last 500 ka. Neogene and Early Pleistocene sediment accumulation on the fan prior to the UTS was much slower (<0.03 m ka−1), and underlying turbidite systems(?) had substantially different morphologic expression(s).
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Subjects
free text keywords: Geotechnical Engineering and Engineering Geology, Earth and Planetary Sciences (miscellaneous), Environmental Science (miscellaneous), Oceanography, Geomorphology, Outcrop, Turbidite, Ridge, geography.geographical_feature_category, geography, Early Pleistocene, Neogene, Paleontology, Monterey Canyon, Pleistocene, Geology, Turbidity current
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