52 
PETROLEUM OF PACIFIC COAST OF ALASKA. 
[BULL. 250. 
the most noticeable of which was a Rhynchonella, and a few others were 
obtained at high-water mark where the same ridge came down to the beach. 
The matrix was coarse and friable and the specimens were few, but it seemed 
certain that the two lots belonged to the same fauna, which must range through 
at least 1,000 feet of strata. The rock is chiefly a calcareous shale, barren of 
fossils, which disintegrates into small angular fragments, forming enormous 
and extremely regular talus slopes. Where a seam of sand and gravel or 
coarse sandstones is interleaved with the shales, there the fossils are found, 
but these seams are rare.a 
The rocks seen by the writer in the vicinity of Cold Bay consist 
of dark-brown arkosic sandstone alternating with conglomerates, and 
a few thin limestones and dark shales which break on the weathered 
surface with a conchoidal fracture. 
Fossils were collected at several localities. The low sandstone 
cliffs extending for about 1 mile above the store at the lower 
landing cariw abundant specimens of Belemnites. Dr. T. W. Stanton 
lias examined the specimens and is of the opinion that three species, 
indicating a horizon in the middle Jurassic, are present. He com- 
pares them with the faunas of the middle and upper zones of the 
Enochkin formation of the Cook Inlet region. Fragments of a small 
belemnite Avere collected at the base of the cliffs 2 miles northwest 
of Cape Aklek. Doctor Stanton considers that the horizon of this is 
Jurassic, but the fossils are too scanty and fragmentary for precise 
reference of the strata. The rocks at this point consist of arkosic 
sandstones well exposed in high cliffs. An ammonite was seen in 
the face of the cliff near the top, showing that the entire series is 
Mesozoic. Four miles southwest of this point, where Oil Creek flows 
into Dry Bay, specimens of Cadoceras schmidti Pompeckj were 
obtained. Doctor Stanton believes these fossils belong at the same 
horizon as those already referred to from the shores of Cold Bay. 
General section in the Cold Bay-Beeharof Lake region. 
Name of forma- 
tion. 
Age. 
Lithologic character. Thickness. 
Post- Jurassic - 
Volcanic rock, prob- 
ably andesite or 
basalt. 
Naknek forma- 
tion. 
Upper Jurassic 
Arkose, conglomer- 
ate, sandstone, and 
shale. 
3,000 to 5,000 feet. 
Enochkin for- 
mation. 
Middle Jurassic . . . 
Shale, sandstone, and 
a little limestone. 
2,000 feet. 
Triassic 
Shale, limestone, and 
chert. 
Pre- Jurassic 
Granite, syenite, 
etc. 
Op. cit., p. 870. 
