198 



G. L. COLLIE — WISCONSIN SHORE OF LAKE SUPERIOR 



Introduction 



This paper is the result of a series of observations taken during the 

 summer of 1900. The descriptions cover that ])ortion of the sliore be- 

 tween point Detour, the northernmost point of the Wisconsin mainland, 

 and the Montreal river, the boundary between Wisconsin and Michigan. 



Point Detour is at the extremity of an unnamed peninsula wliich juts 

 out into the lake; it is here called Chippewa point. This peninsula 



CSn] Shore formations, bars and beaches 



Rock c/iffs. 

 CD Till c/iffs, 



c Caverns 



S- Spits waning 



s± Spif'S neither ^a/n/ng or fosf'n^. 



— Sand cuts " 



Scale 



FicjiKK 1. — C/iijijiiiift Point ami the A pout Ir Group of Js/mids. 



forms the western shore of the indentation known as Chequamegon bay. 

 Lying al)out the })eninsula and stretcliing across the mouth of the ba}" 

 is a cluster of islands, the Apostle group. This paper deals with the 

 shore phenomena occurring in this ba}- and on the Apostle islands. It 

 is not jdanned to enter into a discussion of the older sh-ore ])henomena, 

 but simply to consider those whi(;h have arisen since the lake reached 

 its present level. 



Genkral Geoloc^y of the Region 



RELATIONS OF HOCKS AND GLACIAL MATERIAL 



At the Wisconsin-Michigan line the rocks, Keweenawan in age, are 

 mainly sandstone and shales, dipping to the northwest at high angles, 



