410 STANTON AND MARTIN — MESOZOIC SECTION ON COOK INLET 



small scattered areas, and their faunas may be directly correlated with 

 those of formations in California and elsewhere on the Pacific coast. 



The general relations of the formations may be epitomized in the fol- 

 lowing section : 



Tertiary. — Kenai formation. Shales, sandstones, and conglomerates 

 with several beds of coal. The entire formation non-marine and 

 characterized by a large flora. Thickness, ± 2,000 feet. 

 Unconformity. 

 Upper Cretaceous. — Lithologically similar to the Kenai, but including 

 some marine shales and sandstones with an Upper Cretaceous fauna. 

 Thickness, ±1,000 feet. 

 Unconformity. 

 Lower Cretaceous. — (Not seen within the area studied.) Shales and sand- 

 stones with Aucella crassicollis. 

 Unconformity ? 

 Upper Jurassic. — Naknek formation. Conglomerate, arkose, sandstone, 

 and shale with interstratified andesite flows. Thickness, about 

 5,000 feet. 

 Middle Jurassic. — Enochkin formation. Shales and sandstones with 

 some conglomerate beds. Thickness, 1,500 to 2,500 feet. 

 Unconformity ? 



(Possibly conformable on Lower Jurassic when that is present.) 

 Lower Jurassic. — Tuffs and sandstones. Thickness, ± 1,000 feet. 



Unconformity. 

 Upper Triassic. — Thin bedded cherts, limestones, and shales usually 

 much folded and contorted and with many intrusive masses. 

 Thickness, ± 2,000 feet. 

 Base not seen. 



