Vol. VII] GESTER— GEOLOGY McKlTTRICK DISTRICT 217 



34 are one or two small patches of sand questionably re- 

 ferred to as the Etchegoin. Across the S. )4 of Sec. 28 yel- 

 low and gray Etchegoin sands strike N. 74° W. and extend 

 into Sec. 29, where they are covered by the overlapping 

 Tulare beds. Fossils of the same species that characterize the 

 Lower Etchegoin of the Coalinga district are found in several 

 localities in this area. The best collections were made from 

 a hard gray sandstone on the southeast slope of a knoll in the 

 S. W. yi of Sec. 27. At this locality among the species 

 recognized are 



Echinarachnius gibbsi. Ostrea atwoodii. 



Pecten eldridgei. Macoma nasuta (?) 



Pecten coalingensis. Macoma inquinata. 



Pecten crassicardo. Neverita recluziana. 



Pseudocardium gabbi. Nassa californica. 



Cardita californica. Lunatia lewisii. 

 Area trilineata. 



On the western flank of the anticline in Sec. 28 and 29 

 Etchegoin fossils are also found. The bed of abundant, well 

 preserved Pecten eldridgei has already been mentioned. In 

 this bed occur many broken shells of a small oyster. South- 

 east of the Pecten eldridgei beds in the same stratigraphic 

 position in a firm yellowish sand several specimens of Echin- 

 arachnius gibbsi were collected. 



Near the fossil locality in the S. W. ^ Sec. 27, sections 

 were made across the Etchegoin which, beginning at the top, 

 contain 



Gray sand, conglomerate and pebbles 30 ft. 



Oil sand, conglomerate and pebbles 25 " 



Oil sand 50 '' 



Gray sand and oil stained shaly beds 20 " 



Hard gray sand and marine fossils 80 " 



Gray sand in part oil sand shale below 25 



Total 230 " 



The above section is the composite result of several sections 

 on the east side of the fold. In one locality boring mollusks 

 indicating strand line conditions were found in fine grained, 

 indurated sand on top of the shale. A loosened fragment 

 showed the holes extending from a coarse hard sand into a 

 firm sandy shale. 



The stratigraphic sequence of the Etchegoin near the Sham- 

 rock wells just to the northwest of the area mapped is similar 



