146 



Adventures in Scenery 



After A. C. Lau'son, U. S. Geol. Sun 



FIG. 45. Map of San Francisco Bay and vicinity, showing tilted fault blocks. The eastern 

 boundary of the Berkeley Hills is not clearly defined. It lies east of the Berkeley Hills and west 

 of the Mount Diablo thrust block. The bar outside the Golden Gate was formed as a delta by the 

 stream which flowed in the old valley of San Francisco Bay before the valley was submerged. 



