EE8UME OF LITERATUBE. 59 



divisions which are supposed to be represented. I have repeated tlie section of 1874 

 and 1875, returning it in the former case to its original continuous form, but 

 retaining Peale's grouping. The following is the Eagle River section as it appears 

 in the report for 187-4: 



Section of Permian or Perino-Carbomferous strata on Eagle River. {After Peale.) « 



Thickness. 

 Ft. In. 

 7. Space probably filled with gandstones and shales reaching to the summit of the hill back 



from the bluffs, containing a thickness of about 500 



6. Eather coar.se gray sandstones, in thin beds, fossiliferous and weathering of a rusty color _ 342 4 

 5. Massive sandstones, generally of a gray color with a greenish tinge. They are mostly 

 fine grained and generally micaceous. Some of the beds are pebbly, and near the bot- 

 tom is a band of black shale with carbonaceous material. This band is from 6 to 8 

 feet in thickness. These sandstones are exposed in a bluff, in the upper part of which 



they are conglomeritic and darker in color than below 205 10 



4. Coarse gray sandstone with interlaminated shales 145 



3. Very hard, irregular-structured blue limestone, of a brownish color on weathered sur- 

 face 10 



2. Greenish-gray micaceous sandstone shales, with bands of very hard sandstone 45 11 



I. Coarse white conglomerate 27 3 



Total thicknees about 1, 276 4 



Section of Carboniferous strata on Eagle River. [After Peale. ) ^ 



Thickness. 

 Ft. In. 



1. Pink conglomeritic sandstones 37 5 



2. Conglomeritic sandstones and gray shales 92 9 



3. Light-gray shales with hard sandstone bands 3 9 



4. Blackish mit!aceous shales 3 9 



5. Sandstones and interlaminated micaceous shales, some of the sandstones conglomeritic. 367 2 



6. Sandstone conglomerate with pebbles of quartz from 1 to 2 inches in diameter. This 



bed is the base of a bluff-like wall, and is 10 feet in thickness. Above are beds of 



shale and coarse sandstone in alternation. On top is a greenish micaceous sandstone. 252 



7. Coarse, grayish sandstone, with interlaminated shales; near the top is a layer of red 



sandstone, succeeded by a conglomeritic layer 25 1 



8. Fine-grained, reddish-brown sandstone 27 4 



9. Coarse-grained, hard sandstone, spotted with green, general color gray 4- 



10. White and greenish-gray conglomerates and shales. First we have a conglomeritic 



sandstone, and then green micaceous shales with black carbonaceous layers; followed 

 by more conglomeritic layers, above which is about 15 feet of hard sandstone, with 

 interlaminated soft shales; then 5 feet of compact gray micaceous sandstone. Next 

 are very soft greenish-gray micaceous shales, extending for about 10 to 12 feet of 

 alternating shales and sandstone (some of the latter conglomeritic) in beds from 2 to 

 4 feet in thickness. Afcove these are conglomeritic sandstones with shales in the 

 center. The total thickness is about 511 



II. Coarse white sandstone, with a band of hard fine-grained sandstone near the top. The 



micaceous character is marked between the layers - . 40 



aV. S. Geol. Geog. Surv. Terr., [Eighth] Ann. Kept., for 1874, 1876, p. 118. Mbid., p. ll^i. 



