GLACIAL MAP OF THE GREAT LAKES REGION 



X>vi.Efc}es Areas. OVdair Dvxtt. Newel- Drift 



MIoraLnae. Glaoial Striae TvacX o Diavn.on.ds 



K.KoVLlsviAle O.DowagiaC M ,Milt OJA. P,Ta-u.j-i-. C x- K . B JBix x-lin^t ori. 



Fig. i. From The Journal of Geology. 





