222 Wisconsin Academy of Sciences, Arts, and Letters. 



Maumee - Wabash valley — the glacial trough. — and, recurving 

 upon itself, bears awaj to the northeast, approximately parallel 

 to the Kettle belt already described in southeastern Michigan. 

 This wing of the St. Mary's ridge bears the same relation to the 

 Kettle belt bordering the Erie basin on the Michigan side, that 

 the opposite wing does to the " Kame" belt on the south side. The 

 force of thi?! relationship is not easily escaped. 



If my views are correct, that this Michigan belt was formed 

 along the right hand margin of the Erie glacier (conjointly with 

 the Saginaw glacier), just as the " Kame " belt was formed on the 

 left hand margin, then its composition should give evidence of 

 the fact. In the case of the Grreen Bay glacier, I have shown 

 that the lines of striation and transportation diverge from the 

 main axis toward the margin,^ and, so far as the paths of other 

 glaciers lie within Wisconsin, the observations made upon them, 

 imply the same method of movement, and this habit finds partial 

 exemplification among the glaciers of the Alps — partial, be- 

 cause their contracted valleys and steep slopes afford little oppor- 

 tunity to deploy in this fashion. If this manner of movement 

 holds true with the Erie glacier, material from its trough will be 

 found to have been transported westward and northwestward 

 toward the moraine. Thirteen years ago, in an article in the 

 American Journal of Science, entitled, " Some Indications of a 

 Northward Transportation of Drift Material in the Lower Penin- 

 sular of Michigan,"^ Professor Alexander Winchell called atten- 

 tion, with much detail and precision, to a large mass of evidence, 

 which finds, for the first time, so far as I am aware, satisfactory 

 explanation in the view now presented, and, in return, has 

 the force of confirmatory evidence. It appears that immense, 

 and often but slightly eroded masses of Corniferous limestone, 

 have been borne in the direction indicated, and scattered over the 

 areas of the Hamilton group, the Marshall sandstone, and the 

 Subcarboniferous limestone ; that similar blocks of Hamilton rock 

 have been deposited over the two last named formations and even 

 beyond ; that the Marshall sandstone has likewise been borne on 

 to the Carboniferous limestone, and that this transportation has 



' Geol. of Wis., Vol. H, pp. 199 etseq. » Am. Jotir. of Scl., Vol. XL, Nov., 1865. 



