Geologic Sections: Supplement 1 from "Geology of a part of the San Joaquin Hills " (Thesis)

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The work on which the present report is based has been done by Mr. Francis D. Bode and the present writer. The problem was originally taken up as a thesis project for the degree of Bachelor of Science at the California Institute of Technology. Since that time, the author has spent all time available for research under the Institute curriculum for the Master's Degree on this problem. Mr. Bode has also spent a considerable amount of time on the area since the original theses were written. This study has been carried on under the direction of Dr. John P. Buwalda, chairman of the Division of Geology and Paleontology at the California Institute of Technology. The ultimate object in view in this work is a detailed knowledge of the structure and stratigraphy, as well as of the fauna of the area. The immediate result desired in this thesis was a general account of the major structural features and a general knowledge of the stratigraphy and faunas. This last result is thought to have been accomplished. Detail of structure in many parts of the area have yet to be worked out. In the region between Laguna and Abalone Point Canyon near the coast, particularly, the structure shown on the map here presented is subject to revision. It is apparently complicated and our present conclusions may be considerably altered in detail with further work. Likewise, the general stratigraphic column is thought to be satisfactorily known. Finer subdivisions can be made and mapped; but it was not possible to do so for the present report. There is a great deal of paleontologic material to be found in the Hills. Collections thus far made are probably representative but not complete. The paleontologic determinations here presented are tentative; further work will, however, probably not alter the general conclusions drawn from the paleontologic evidence. It is hoped by Mr. Bode and myself that, in the course of work to be pursued for the Doctor's Degree, we shall be able to complete a detailed study of the Hills. Mr. Bode proposes to continue work on the structure; and I hope to make detailed studies of the petrology and faunas of the Vaqueros and Temblor formations.

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