KMM' »H8. 



GEOLOGICAL PANORAMA OF THE WASATCH RANGE. 



389 



Peak (11,560 feet or 3,:>:23 m. 

 elevation) forms its northern 

 wall, wliit-li is mostly granite, 

 but with Cambrian qnartzites 

 forming the summit ridge as 

 shown in the section. The 

 foot hills between the mouths 

 bf Little and Big Cottonwood 

 canyons are formed of a series 

 of crystalline schists dipping 

 westward a way from the gran- 

 ite body, which are repre- 

 sented by the blank space at 

 left of section. At the con- 

 tact the granite sends veins 

 into these schists, and also 

 includes fragments of them 

 within its mass, which proves 

 its later age. This series of 

 beds was considered by the 

 geologists of the Fortieth par- 

 allel survey to probably rep- 

 resent the llnronian division 

 of the Archean; further 

 study may lead to their in- 

 clusion in the Algonkian. 



South of this canyon the 

 second highest point of this 

 portion of the range, Lone 

 peak r>1 (11,2^5 feet (3415 m.) 

 elevation) is about the center 

 of the great granite mass 

 whose exposed area measures 

 s by 12 miles (13 by L9 km.). 

 An encircling series of lower 

 Paleozoic beds wraps around 

 its northern, eastern, and 

 southern sides, and a thin 

 shell of crystalline schists 

 rests upon its western Hanks 

 forming the extreme foothills 



toward the Jordan Valley. 



On the ridge forming the 

 southern wall of the entrance 

 to Little Cottonwood canyon 



