PEALE.] 



GEOLOGY SECTION NO. 21. ^ 251 



shown dipping away from the granite nucleus. They are lifted high up, 

 and form some of the most prominent peaks in the range, the stratifi- 

 cation of the rocks giving the mountains a peculiar architectural form. 

 The pyramidal form is frequent. Southeast of the peak I made the fol- 

 lowing section in ascending order : . 



Section No. 24. 



1. From the pass at the head of a small western branch of Taylor Eiver 



we have a space reaching about 400 feet up the hill, in which the 

 beds are covered. Occasional outcrops indicate that this space is 

 tilled with red sandstones below, above which there are lime- 

 stones, with interlaminated shales and conglomerates. Above 

 we have as follows : 



2. Hard gray laminated sandstone, becoming coarse near the top; dip 



50° ; 50 feet. 



3. Conglomerate ; pebbles of blue limestone and granite, from I to 4 



inches in diameter, in a coarse red sandy matrix, 30 feet. 



4. Brownish red sandstone, 20 feet. 



5. Space probably filled with continuation of 'Eo. 4, 20 feet. 



6. Dark, comjiact, grayish-blue limestone, fossiliferous, with veins of cal- 



cite, becoming laminated, and somewhat laminated as we go up, 

 12 feet. 



7. Yellowish-gray standstone, becoming conglomeritic above, with peb- 



bles of limestone and granite. The dip here is about 40° ; 4 feet. 



8. Coarse yellow sandstone, 5 feet. 



9. Fine yellowish sandstone, in laminse of about ^ of an inch. The • 



lower layers have a reddish tinge, while those above become more 

 gray ; 3 feet. 



10. Sandstone shales; some of the layers are conglomeritic, with peb- 



bles of limestone. Below they are gray, in the middle red, and 

 above yellow ; 60 feet. 



11. Compact blue limestone, very dark and laminated below, lighter- 



colored above, and fossiliferous, 4 feet. 



12. Bluish-gray calcareous shales, 8 feet. 



13. Yellowish sandstones, somewhat shaly, graduating toward the top 



into fine calcareous shales, 50 feet. 



Bluish calcareous shales, 3 feet. 



Snuff-colored sandstone, loose textured and i)orous, 4 feet. 



Bluish-gray calcareous shales, 25 feet. 



Blue laminated limestone, weathering light gray, 5 feet. 



Sandstone, weathering dark yellow, with interlaminated soft gray 

 sandy shales, all calcareous, in layers from 1 to 2 feet thickness, 

 50 feet. 



Coarse reddish yellow sandstone, followed by an alternation of sand- 

 stones and shales, 60 to 70 feet. 



Purplish-red sandstone, 5 feet. 



Eeddish-yellow sandstone, 30 feet. 



Yellow sandstone, 10 feet. 



Reddish sandstone, 5 feet. 



Sandstones and shales, 30 feet. 



Space probably filled with sandstone, 70 feet. 



Blue laminated sandstone, 25 feet. 



Gray sandstone, 8 feet. 



Coarse reddish sandstone, becoming gray toward the top, (j5 feet. ^ 



Blue fossiliferous limestone, 5 feet. 



