ICE WORK IN SOUTHEASTERN MICHIGAN. 
OUTLINE. 
Introduction. Early Wisconsin. 
General topography. Iowan 
Surface topography. Illinoian. 
Rock topography. Rock shattering. 
Drift of the region. Scorings in Monroe county. 
Aly Eastern portion. 
Moraines. Central portion. 
Ice action in Wayne county. Western portion. 
Late Wisconsin. General considerations. 
INTRODUCTION. 
Ow1nc to its geographic position, lying directly athwart the 
southwestward movement of the great Laurentide ice-sheet, with 
the maximum extent of international boundary, far enough dis- 
tant from the great center of ice accumulation as well as from 
the southern limit of its movement, the state of Michigan must 
theoretically have borne the brunt of the Canadian ice invasion. 
Surrounded as is no other state by rock-basins, only partially 
occupied by our present Great Lakes, the evidence is not want- 
ing that the Laurentide ice operated with exceptional vigor over 
the two peninsulas and the adjoining regions. So far as at pres- 
ent known, the most extensive and interesting exposures of ice 
activity within the state are to be found in the southeastern 
counties of Wayne and Monroe, bordering Lake Erie and the 
Detroit River. The following report upon this region is based 
mainly upon work carried on for the Michigan Geological Survey 
and is here published with the consent of State Geologist Dr. 
Alfred C. Lane. The series of Huron-Erie moraines, which lie 
to the west of the Upper Maumee beach in Washtenaw and Len- 
awee counties, as well as the beach itself, were traced upon the 
accompanying map from field maps of Mr. Frank Leverett, to 
whom the writer is indebted for many suggestions concerning 
the interpretation of the glacial features of this region. 
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