W. Upham—Minnesota Valley in the Ice Age. 11 
much propriety be denominated an extended pool of stagnant 
water.” All these results of recent fluvial action show that 
crops of section 82, Louisville. The recent accumulation of 
sediments that fill this avenue to a height slightly above the 
Little Rapids, has turned the river that way, so that it has 
abandoned its former course and now flows over ledges of sand- 
stone 
Four features of the glacial drift in Minnesota seem to me 
T 
referred to, this essay has receive important contribu- 
tions and suggestions. Therefore it seems fitting to pro 
here for the ancient river which fl in the Ice Age where 
