IGNEOUS AND TECTONIC PROVINCES OF WESTERN CANADA 587 



the Telegraph Creek field, at Mount Hoodoo and Mt. Edgecomb and in Rockies. If a geanticline is present there, it is very broad and is invaded 



the Wrangell field, but this is an alignment only in the broadest sense, and by so many batholiths that it is represented as part of the batholithic 



separated by a 400-mile gap from the Cascade volcanoes. belt. 



The Rocky Mountain trench separates the Beltian geanticline from the The batholithic belt is about 400 miles wide at the international bound- 



Laramide Rockies in British Columbia. Its projection in Yukon, the ary and 300 miles wide at the Yukon-British Columbia boundary. At the 



Hntina trench, separates the batholithic belt from the Laramide (?) Alaska border it is 200 miles wide. See Fig. 39.2. 



