189 



the lower regions to the east permitted the advance of the ice to the 

 Ohio River, and on the west the ice crept south almost to the mouth 

 of the Wabash in Indiana and nearly to the mouth of the Ohio in Illinois. 

 The last general invasion sent ice much further south in Illinois than in 

 western Indiana. 



The recession of the ice was in general the inverse of its advance. 

 It melted away on the divides, became differentiated again into lobes, 

 which gradually withdrew up the depressions along their lowest lines. 

 The evidence is abundant to show that the last ice sheet disappeared 

 along a line running east of the Wabash River from Terre Haute through 

 Crawfordsville to Lafayette l)efore the region traversed by the present 

 river below Lafayette Avas uncovered. Probably this Intenobate melt- 

 ing continued northward along the line of the lower Tippecanoe and upper 

 Kankakee into Michigan. 



The evidence that the last ice in western Indiana occupied the region 

 south and east of the great bend of the Wabash after it had receded from 

 the country farther east is embraced in the condition and arrangement 

 of numerous moraines, many overflow channels, and temporary lake beds 

 with their traversing stream lines of different ages. 



The moraines along Raccoon Creek, Sugar Creek, the southward 

 flowing part of Coal Creek and the east and west ridges extending across 

 Fountain County, together with a high, sharp, and in some places very 

 narrow moraine running east from the town of West Point, Tippecanoe 

 County, to a point five or six miles southeast of Lafayette, do not seem 

 to have been overridden or much disturbed since they were laid down. 

 They were deposited by ice from west and north of the present river line 

 and according to their shape and trend, evidently by the Lake Michigan 

 lobe. The heavy moraine north of the Wabash and west of the mouth of 

 the Tippecanoe has not been overridden. It is a moraine of the Michigan 

 lobe called, by Mr. Frank Leverett, the "Bloomington moraine," and 

 extends twenty-five or thirty miles farther northeast than he has 

 mapped it.* Moraines trending northwest and southeast in southern 

 Tippecanoe County seem to be outposts of minor advances of the ice from 

 the Erie lobe around the southern edge of the Michigan lobe. These 

 ridges run across the line of division between the lobes and have numer- 

 ous gaps through them. 



*See map pp. bet. 24-25, in his late U.S. G.S. Monograph XXXVIII on the Illinois Lobe. 



