NEOCENE STRATIGRAPHY. 335 



survey; but the beds we are here considering the top of 

 the PHocene they called " Post -Pliocene." They noted 

 the presence of two extinct forms — Scutella interlineata 

 Stimp. and Crepidida gj'andis Midd. — among several 

 species still living on this coast. It was on the finding of 

 these two forms that the main section was judged to be 

 Pliocene. In the upper two beds they found only shells 

 of recent species, among which the genera Tellina, Myti- 

 lus and Buccinum are represented. Of these two beds, 

 the lower, according to Mr. Remond, have a northwest 

 strike, and dip to the northeast at an angle of 35", while 

 the upper ones have an inclination of only 10°. We have 

 already seen that over most of the distance the lower beds 

 really have a dip of from 65" to 75°, and we find that 

 these upper beds have a dip of from 5° to 40". 



Structure and delations of Uppermost Beds of Merced 

 Series. — The present position of the strata of this forma- 

 tion as exposed along Seven-Mile Beach is shown on the 

 left of plate xxiv. The dip over most of the section is from 

 i& to 30°, but rises as high as 40°, and at one point was 

 50'^^, but was probably local, due to recent movement. 

 At the northern end the strata becomes practically hori- 

 zontal. Except along the stretch of landslide, the strata 

 have nearly the same strike as the beds underlying, rang- 

 ing from N. 50° W. to nearly due N. 



The contact between the Pliocene and underlying beds 

 is obscured by its occurring just at the south end of the 

 long landslide. A detailed examination failed to reveal 

 any definite evidence in proof of or against nonconform- 

 ity at this point. 



In favor of conformity is — a similarity between certain 

 of the strata lithologically, a similarity in their structure, 

 and the lack of definite proof of nonconformity, which 

 factor must be taken as favorable to conformity. 



