Extinct vertebrate faunas of the Badlands of Bautista Creek and San Timoteo Canon, Southern California, (University of California publications. Bulletin of the Department of Geology)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 Excerpt: ...of fine sandy clay of flint-like hardness. No trace of fossil material was found about the well rounded and typical ridges of hard, compact, bluish-green shales, where the even surface and thin, downward-moving mantle of weathered gravels seemingly affords little opportunity for material to collect. At three localities nodules occurring in the neighborhood of interbedded ledges of sandstone and of hard nodular calcareous clays outcropping through ridges to west and southeast have been found to contain associated skeletal remains of individual camels. The two localities which have yielded the greatest amount of the best fossil material, and which at the same time show the best sections, are: the exposure to the northwest side of the ravine, a fourth of a mile north of Eden Springs, near the contact with the brown-gray sandstone of the overlying formation; and the ledges on the shoulder of the mountain, one-half of a mile farther to the southeast. The Eden ravine section consists of massive sandstones in the creek bottom, followed by seventy feet of typical Eden deposits (light bluish-green shales, interbedded with layers of coarse to fine and clayey laminated sandstone and nodular calcareous clays) unconformably overlain by the lighter textured beds of the San Timoteo. The fossil material of this locality was traced through the wash, and dug from a tough, sandy shale of greenish-grey tinge. The matrix varied in texture from coarse to fine and floury, the finest containing quartz grains and small, rounded pebbles. The many rounded fragments of bone, and the small,1 flat stones lying in contact with more perfectly preserved fragments indicate the origin to be one of stream collection and deposition. This northwest-dipping section apparently strati graphically ...