PART OF ENOCHKIN SECTION 399 



The concealed intervals in the lower part of this section are very large, 

 only about half of the total thickness being shown. Both top and base 

 are, however, represented. The accompanying photograph (plate 69, 

 figure 1) shows the exposure of zone D and the overlying Naknek forma- 

 tion in this section. The following sections fill most of the gaps : 



Section of part of Enochkin formation on south shore of the luest arm of Snug harbor 



Shaly sandstone with scattered fossils, Inoceramns, Trigonia, Sphseroceras, 



Phylloceras, etcetera , 55 



Black sandstone with small white angular grains 8 



Hard gray sandstone 1 



Black sandstone with Inoceramus ambiguus, Stephanoceras cf. humphriesianum, 



Sphxroceras oblatum f etcetera 3 



Dark shale . . 8 



Soft coarse black sandstone with white grains 39 



Fine grained gray shale with Sphxroceras oblatum, Belemnites, etcetera 18 



Fine grained gray shale 35 



Bands of sandstone and shale 4 



Dark soft shaly rock with coarse grains 10 



Dark limestone with abundant fossils, Sphxroceras cepoides, Pleuromya, 



etcetera , 3 



Dark shale 3 



Dark conglomerate rock (arkose) 7£ 



Dark shale with conglomerate bands 26 



Sandstone 1 



Gray shale 15 



Sandstone 2J 



Shale with scattered fossils 1 2£ 



Sandstone and shale, Stephanoceras carlottense, S. richardsoni, Sphxroceras 



cepoides, Lytoceras, Phylloceras, and many other fossils 3 



Shale with concretionary bands 10 



Concealed by a fault ±100 



Gray shale with numerous sandstone and concretionary bands and occa- 

 sional fossils, including Stephanoceras cf. humphriesianum 100 



Gray shale with occasional sandstone and concretionary bands 150 



Gray sandstone with Inoceramus ambiguus and a few other bivalves 120 



Limestone conglomerate with clavellate and undulate Trigonias, etcetera. . . 1£ 



Gray sandstone 3 



Dark gray fossiliferous sandstone. . , 1 



Gray sandstone with many small fossils 11 



Fossiliferous conglomerate with Belemnites 2 



Shaly sandstone with Inoceramus lucifer and Lima cf. gigantea 52 



Sandy shale with a few thin indurated fossiliferous sandstone bands. 35 



Indurated ledges of argillaceous sandstone I to 4 feet thick, alternating with 



somewhat thicker beds of clay (fossiliferous) 25 



Shale with abundant Ammonites, Stephanoceras, Harpoceras, etcetera 20 



LIV— Bull. Geol. Soc. Am., Vol. 16, 1904 



