I20 UNIVERSITY OF COLORADO STUDIES 
various heights up to 200 ft. above the bed of Owl Creek. Farther 
north there is a continued rise in the general level as is shown by the 
OUTLINE Map or NortH-CENTRAL COLORADO 
F Only a few of the streams are shown. Larimer County, at the top of the map, is 
entirely east of the continental divide. Ft. Collins, the county seat, is on the plains a few 
miles east of the sedimentary rock ridges. The area described in this paper extends north 
from Ft. Collins to the Wyoming line. Reference figures: 1. Box Elder; 2. Red Moun- 
tain; 3. Owl Canyon. 
course of streams which is essentially toward the south. At the point 
where the North Box Elder cuts through its granite canyon into the 
