R. Arnold — Rocks from the Sawtooth Range. 



Art. II — Notes on some Rocks from the Sawtooth Range 

 of the Olympic Mountains, Washington;* by Ralph 

 Arnold. 



Probably less is known about the geology of the Olympic 

 Mountains, Washington, than of any other equal and important 

 area in the United States.f For that reason the writer was 

 particularly interested in a small collection of rocks from one 

 of the important but little known ranges of this great moun- 

 tain group, l^ecently received from Mr. F. H. Stanard, Seattle, 

 Washington. The following paper is based upon the examina- 

 tion of these rocks supplemented by brief field notes supplied 

 by Mr. Stanard. The writer is indebted to Dr. Albert 

 Johnannsen, United States Geological Survey, for assistance 

 in the petrograpliic determinations. 



Location. 



The Sawtooth Range is a narrow, pinnacled ridge about 15 

 miles in length, extending in a southwest-northeast direction in 

 the southeastern part of the Olympics 45 miles due west of 

 Seattle. Mt. Skokomish, elevation 6500 feet, in Sec. 3, T. 24 

 N., R. 5 W., and Mt. Henderson, a mile farther northeast, are 

 the highest points in the range and are located between one- 

 third and one-half the distance from the southwest to the 

 northeast end. The southern end of the Sawtooth Range is 6 

 miles in an air line from Lake Cushman, but by trail is at least 

 twice as far. Some of the rocks discussed come from near 

 what is known as Camp Black and White;); in Sec. 7, T. 24 

 ~N., R. 5 W., midway between the crest of the south end of the 

 range and Box Canyon, through which flows the North Fork 

 of the Skokomish River. Still others come from Smith's 



* Published with the permission of the Director, U. S. Geological Survey. 



f The following are the most important articles so far published concern- 

 ing the region: S. C. Gilman, The Olympic Country, Nat. Geog. Mag., 

 vol. vii, pp. 133-140, pi. 16, 1896 ; Arthur Dodwell and Theodore F. Eixon, 

 Forest Conditions in the Olympic Forest Reserve, Washington, Prof. Paper, 

 U. S. Geo!. Survey, No. 7, 100 pages, 20 plates, 1 map, 1902 ; H. S. Conard, 

 The Olympic Peninsula, Washington, Science, N. S., vol. xxi, No. 532, March 

 10, 1905, pp. 392-393 ; Ralph Arnold, Geological Reconnaissance of the 

 coast of the Olympic Peninsula, Washington, Bull. Geol. Soc. Amer., vol. 

 xvii, pp. 451-468, pis. 55-58, Sept. 1906 ; Chas. E. Weaver, Notes on the 

 Bedrock Geology of the Olympic Peninsula, The Mountaineer, vol. i, No. 3, 

 Sept. 1907, pp. 57-64, 1 plate, Seattle, Wash. 



% It is always interesting to know the derivation of place names, and in 

 this connection Mr. Stanard furnishes the following note concerning the 

 origin of "Camp Black and White*' : "This camp was named by some of the 

 early elk hunters from a brand of whiskey of that name, one of the party 

 being sober enough at one period of their sojourn at this place to mark the 

 name prominently on a tree." 



