Vol. VII] GESTER— GEOLOGY McKITTRICK DISTRICT 213 



iferous and fragments of pure crystalline gypsum are com- 

 monly seen on the surface. Near the base are several strata 

 of oil sands and in a sandy shale associated with the oil- 

 impregnated sands are fresh water Tulare fossils. One of the 

 best fossil localities is near the mouth of a small tunnel which 

 was driven for asphaltum, in early days, in the northeast 

 part of the N. E. ^^ Sec. 34, T. 32 S., R. 22 E. The fossils 

 occur in a stratum three to four feet wide, which is overlain 

 by clays and underlain by an oil sand which strikes N. 65 deg. 

 W. and dips 70 deg. to the northeast. South of this locality 

 on the east side of a small gully is an oil sand containing 

 several fresh water species. From these two localities there 

 was recognized such forms as 



Anodonta kettlemanensis (Arnold). 

 Anodonta andersoni (Arnold). 

 Amnicola andersoni (Arnold). 

 Carinifex marshalli (Arnold). 

 Physa humorosa (Gould). 



Several sections were made across the Tulare, the following 

 being a typical one, beginning at the top : 



Soft yellow and gray sands, strike N 62° W, dip 



65° NE 150 ft. 



Fragmental shale bed 66 " 



Yellow sand 40 " 



Gray sand, shale fragments at base 125 " 



Clay 20 " 



Gray sand ISO " 



Clay and gray sand 90 " 



Sandy clay 60 " 



Fragmental shale 15 " 



Clay 20 " 



Gray sand 100 " 



Yellow sand and clay, fresh water fossil horizon.. 90 " 

 Thin bedded shale and sand, streaks of oil sand.. 85 " 

 Clay and sand and few pebbles, fresh water fossil 



horizon 60 " 



Oil sand containing some pebbles 10 " 



Clay 45 " 



Oil sand 20 " 



Clay and sand 60 " 



Total 1150 " 



This section is figured at right angles to the strike in one 

 of the gulches in Sec. 27. 



Another section was made across these beds a mile to the 

 south which has a similar stratigraphic sequence but is nearly 



