Sedimentary History of the Ventura Basin, California, and the Action of Turbidity Currents
M. L. Natland, Ph. H. Kuenen, 1951. "Sedimentary History of the Ventura Basin, California, and the Action of Turbidity Currents", Turbidity Currents and the Transportaton of Coarse Sediments to Deep Water, J. L. Hough
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Foraminiferal evidence shows that the water depth of the Ventura Basin was several thousands of feet.during most of its upper Tertiary sedimentary history. The coarse sandstones between the shales were deposited by turbidity currents of high density, and the conglomerates were emplaced by highly mobile submarine slides.
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By 1951, recent studies of the sea floor were forcing drastic revisions of many of our basic geological concepts. The concept of vertical stability of the ocean basins was being challenged by the discovery of “guyots”; sea-mounts whose flat tops, now several thousand feet beneath the sea surface, give evidence of wave truncation. The belief that the deep ocean floor was essentially a flat, featureless plain was completely discredited by the discovery of fault scarps and mountain ranges comparable in size and complexity to any of those existing on the continents. One of the most challenging of recent discoveries is the finding of relatively coarse sediments (coarse silt and sand) in deep basins and on the open ocean floor at depths of several thousand feet and many miles from land. Solution of this problem was particularly difficult because the mere occurrence of these coarse sediments violates some of the traditional opinions of the day about processes operating in the oceans. This volume contains some of the first and best documented research in this area that opened a whole new way to interpret deep water deposition.