40 PETROLEUM OF PACIFIC COAST OF ALASKA. [bull. 250 
Specimens from sandy fossiliferous shales, Enochkin Bay. 
2919. — East shore of Enochkin Bay, Cook Inlet, above lower cabin, zones A 
and B in lower part of Enochkin formation. 
Belemnites sp. Fragments. 
Thracia sp. 
Trigonia dorosehini Eichwald. Abundant. 
Trigonia sp. Belongs to Clavellatse group. 
Grammatodon? sp. a. 
Pseudomonotis? sp. 
Pecten sp. A single very small, smooth form. 
Ostrea sp. Fragmentary specimens of a small irregular species. 
A total thickness of the foregoing beds of probably 150 feet is 
exposed, and then the continuity is broken by a fault having a dis- 
placement of at least 25 feet, beyond which the following section is 
exposed : 
Section of part of Enochkin formation. 
Feet. 
Soft shale 20 
Dark-drab shale with scattered fossils 33 
Hard calcareous shale full of fossils, principally pelecypods 2 j 
Black sand 1 
Dark shale 5 
Black sand 1 
Dark shale with many fossils 12 
Reddish limestone M 
Dark shale with many fossils 14 
Dark shale with scattered fossils ■ 62 
Soft dark sandstone with streaks of conglomerate 10 
1G0£ 
A concealed interval of about 20 feet in thickness succeeds this 
section. Then there is an exposure of about 50 feet of fossiliferous 
shale, followed by another concealed interval of about 20 feet. A 
richly fossiliferous zone is exposed here, from which a representative 
collection was made. The following forms have been identified by 
Dr. T. W. Stanton, who considers the fauna to be of middle Jurassic 
age. 
Specimens from richly fossiliferous shale, Enochkin Bay. 
2000. — East shore Enochkin Bay, below and near lower cabin, zone C, about 800 
feet above base of Enochkin formation. 
Stephanoeeras sp. 
Belemnites sp. a. 
Belemnites sp. b. Abundant. 
Belemnites sp. c. 
Grammatodon? sp. a. 
Grammatodon? sp. b. 
Inoceramus eximins Eichwald.** Abundant. 
Pecten sp. Small form, same as in lot 2919. 
Pecten sp. Large individual that may be adult of last named. 
" The forms described by Eichwald as /. eximius, I. ambiguus, and i. porrectus may al 
belong to one species. 
