55 



When the tirst ice sheet reached its greatest advance into the region 

 now comprising Indiana, the ice "was at least 500 or 600 feet deep over 



L t tj e n d 



Area □ 



lllinot a 11 



Wi 5C n ; I n 



DnH Area ^ fe- ? 





i 



the present site of Terre Ilante and nearly as deep over that of Indianap- 

 olis, and it thicl^ened gradnallv northward. If an observer could have 

 stood on one of the hills in Brown county at that time, he would have 



