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ACKNOWLEDGMENTS

The writer wishes to express his gratitude to Dr. R. H.

Jahns of the California Institute of Technology not only for suggesting

this study of the Soledad basin, but also for his guidance and helpful

criticism during the progress of the work. Discussions with Drs. J. P.

Buwalda, A. E. J. Engel, L. C. Pray, and R. P. Sharp, all of the

California Institute of Technology, have aided in clarifying several

aspects of the study. The writer also has benefited from discussions

of the regional aspects of the problem with several fellow students who

have worked in parts of the area shown in Plate 1. Among these men

are C. R. Allen, R. B. Campbell, L. A. Carlson, R. 0. Castle,

G. P. Eaton, Ross Ellis, M. F. Meier, Carel Otte, Jr., Jesus Ruiz-

Elizondo, and L. T. Silver.

The officials of the U. S. Forest Service and the numerous

residents of the region aided in the rapid completion of the field

studies by allowing the writer free access to their lands.

The field work was supported in part by a research grant from

the Division of Geological Sciences of the California Institute of Tech-

nology. The use of the equipment and facilities of the Division also was

very helpful.

The writer is much indebted to his wife, Sally P. Muehlberger,

who assisted in preparation of the manuscript and who provided con-

tinued encouragement throughout the course of the project.