BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 11, PP. 217-222, PL. 20 APRIL 7, 1900 



CAMASLAND: A VALLEY REMNANT* 



BY GEORGE OTIS SMITH AND GEORGE CARROLL CURTIS 



{Read before the Society December 27, 1899) 

 CONTENTS 



Page 



Introduction 217 



Topography 218 



Geology 218 



Formations 218 



Names and relations 218 



Sandstone 219 



Diabase 219 



Alluvium 219 



Structure 219 



Origin of Camasland . . . . 220 



Introduction. 



Camasland is the local name of a high valley in central Washington. 

 Its peculiar features have rendered this valley well known to all the 

 people of the region, and as a somewhat unique topographic form it 

 deserves description. 



Camasland is situated on the eastern slope of the Cascade mountains, 

 in the northeastern part of Kittitas county, and is included within the 

 boundaries ot the Mount Stuart quadrangle, which has been surveyed 

 both topographically and geologically by the United States Geological 

 Survey. Professor I. C. Russell visited Camasland in the summer of 

 1897, in the course of a reconnaissance of the Mount Stuart area, and 

 called the attention of the authors to this topographic feature when they 

 entered upon the detailed survey of the quadrangle the following }^ear. 



The relief model, a photograph of which illustrates this paper, plate 20, 

 was made by Mr Curtis, and is based on the topographical map. Details 

 were supplied from observations, photographs, and sketches made in the 

 field. The scale of the model is 1 : 11787, or about 5J inches to the mile, 

 sufficient to permit all the suggestive features to be shown without ver- 



* Published by permission of the Direfctor of the United States Geological Survey. 

 XXXII— Bull. Gkol. Soc. Am., Vol. 11, 1890 (217) 



