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F Leverett — Correlation of Moraines 



Fig. 1. Map of the Western Erie Basin and Adjacent Territory. 

 Explanation of Map— The shaded portions represent moraines. Their mapping is incomplete in south- 

 eastern Michigan. Interrogation points are used to indicate the probable position of moraines not yet 

 traced. Striaj are represented by arrows and indicate the general divergence from the axes of the ice- 

 lobes. The continuous lines around the western end of the Lake Erie basin represent the beaches which 

 have been traced. The dotted lines represent their conjectured continuation. The lower beaches 

 (between the Belmore and the present beach) are omitted. There. are usually two well defined ones, 

 throughout the, portion of the basin shown on this map but their distribution is accurately known only 

 in the eastern portion ot the basin. The " Earlier Drift " area in the southwest corner of the map lies 

 outside the moraines of the later ice-invasion. The glacial boundary is probably less regular than 

 indicated by the line on the map. The drift is too thin and discontinuous" near the margin of the glaciated 

 district to admit of exact mapping of the boundary. 



