366 



PLEISTOCENE OF INDIANA AND MICHIGAN. 



Cars. 



Sandy outwash Till plain 



Whittk'sey beach 



In full Modified by 



strength submergence 



Arkona beaches (1st, 2d, 3d) 



1 T 



Warren beach 



Figuee 5.— Map showing relations of Whittlesey, Arkona, and Warren beaches to one another and to the Port 

 Huron morainic system. 



