Vol. XI] D1CKERSQN—PT. REYES AND SANTA ROSA QUADRANGLES (501 



PLATE XXXIV 



Figure 1. Rifted Pleistocene shale, northwest side of Tom's Point. 



Figure 2. Pleistocene shale on northwest side of Tom's Point, east 

 of figure 1. The beds which are dipping away from the observer to 

 the northeast are also cut by another fault along the San Andreas 

 Rift. 



PLATE XXXV 



Figure 1. Pleistocene shale resting on conglomerate, one and three- 

 quarters miles northwest of Millerton. 



Figure 2. Pleistocene shale and conglomerate at west end of head- 

 land, one and three-quarters miles northwest of Millerton. 



PLATE XXXVI 



Figure 1. Triplicate Rift Lines. View from one and one-half 

 miles southeast of Petaluma Reservoir looking northwest. A fault 

 shelf is seen in lower right, a kernbut in center and a notched sky- 

 line marking the three lines of rifting in the background. 



Figure 2. Looking southeast along the Haywood Fault line two 

 miles from Petaluma Reservoir; rift zone is marked by three lines, 

 two of which are indicated by a kernbut, a wooded hill in the right 

 center of the picture. 



PLATE XXXVII 



Figure 1. Sonoma Mountain, Hayward Fault. Looking north- 

 west from a point one mile southeast of the Petaluma reservoir. Note 

 the kernbut in the sky-line. The Petaluma reservoir is located in the 

 distance just above the heavy woods. A fault scarp appears in the 

 middle ground and a long narrow kernbut is seen west of this scarp. 

 Faulting in this region is marked by two and sometimes three rift 

 lines. 



Figure 2. Looking southeast along the Hayward Fault line two 

 eighth of a mile southeast of Petaluma Reservoir. The Hayward rift 

 beheaded the stream once draining across the surface, and its drain- 

 age is now southwest by way of Rodger's Creek. 



