UPTILT OF LAND AT CLOSE OF ICE AGE 



343 



a series of successive uplifts which have brought the island to 

 its present height. 



FIG. 371. View from the observatory upon Mackinac Island across the "Short 

 Target Range" toward the Fort. Beach ridges appear in succession within the 

 cleared space (after a photograph by Rossiter). 



^^^^^-;;j^t /!..;;:- - ' 

 'f^f \ " A^- -, 



FIG. 372. Notched stack of the Nipissing Great Lakes at St. Ignace 

 (after a photograph by Taylor). 



