Berkeley, Sunday Feb 27. At 9 A.M. Dr. etu Castle called at the hotel with [illegible] and Mr. Fry, and we are off to see the structure between here and Mt. Diablo. He has been working about this region for 15 years and has it fairly in hand. The faults mapped by Larson through his students is in parts quite wrong. There is a major thrust of the Mt. Diablo area of Franciscan rocks with outlying parts of Chier and Cengric, from the N.E. to the S.W. It has an intricate or simple structure and is in part still in motion. The movement started later the Pleiocene. It includes "closed rally structures", i.e. as certain extent m and areas thinned and broadened, tho whole rally was closed tho eastern moves close up to the western end at the same swinging around to the north. That the field is still folding is seen in that the alluvium onto the under- lying strata are thrown into slight and decided folds. All around the whole area to the N.E.