

Fig. 39.2. Tectonic map of Alaska and the Yukon Territory. Laramide orogenic belt character- 

 ized by folds and thrust faults mostly in shelf and miogeosyncline sedimentary rocks. The 

 structures of the basins are Late Cretaceous or Early Tertiary; of the geanticlines are partly 

 of Early Cretaceous age or older, Nevadan orogenic belt characterized by numerous batho- 



liths and deformed eugeosynclinal sediments. The intrusions and structures are Early and Late 

 Cretaceous with Early Tertiary structures in the Alaska Range area. Coast Range orogenic belt 

 is marked in part by Tertiary sediments and by folding and thrusting principally during the 

 Late Cenozoic. Interior Tertiary basins not shown. 



