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oai:www.ideals.illinois.edu:2142/98583 2023-07-11 col_2142_5131 com_2142_5130

Emery, Kenneth Orris 2017-11-30T21:01:07Z 2017-11-30T21:01:07Z 10000-01-01 1941 Made available in DSpace on 2017-11-30T21:01:07Z (GMT). No. of bitstreams: 2 6429348.pdf: 7757499 bytes, checksum: dc373a614d38b34eb7a56bb0eca007fe (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1941 Embargo set by: Seth Robbins for item 104104 Lift date: 2019-11-30T21:01:19Z Reason: Electronic Theses and Dissertation Embargo set by: Seth Robbins for item 104104 Lift date: 2019-11-30T21:03:43Z Reason: Electronic Theses and Dissertation Embargo set by: Seth Robbins for item 104104 Lift date: Forever Reason: Electronic Theses and Dissertation Electronic Theses and Dissertation U of I Only Vita. Advisor: Francis P. Shepard, Geology Department. Dissertation (Ph.D.)--University of Illinois at Urbana-Champaign, 1941. Includes bibliographical references (leaves 72-74). Examination of dredge and core samples of the sea-floor off southern California has shown that rock is present on the shelves and on the submarine elevations but is absent in the basins and troughs. The age of many of the sedimentary rock samples was determined through their content of foraminifera and diatoms by M. L. Natland and K. E. Lohman. More general age identifications were permitted by a lithologic comparison with rocks found in outcrops on land. Miocene or probably Miocene sedimentary rocks were found very widely distributed in the borderland ... Volcanics found in many other samples may also be of Miocene age ... Rocks of other ages were also found but these are more localized in their occurance ... The finding of partially consolidated Pliocene sediments on the walls of one submarine canyon indicates that canyon cutting occurred in post-Pliocene times. Similarly, the finding that submarine elevations have upper Miocene sediments entirely unlike those being formed at present in these environments shows that the diastrophism which led to the formation of the blocks, took place in late Miocene or post-Miocene time. Edited summary from dissertation conclusions. 6429348 ocn693895308 http://hdl.handle.net/2142/98583 en Copyright 1941 Kenneth Oris Emery Petrology Ocean bottom Sedimentation and deposition Lithology of the sea-floor off Southern California Dissertation / Thesis text Geology Dissertation Ph.D. (doctoral)