N. H. Winchell on the Glacial features of Green Bay. 19 
and sometimes taking the form of troughs four feet wide and two 
feet deep.* These indicate that the continental glacier moved 
in a direction N.E. and S.W., forming the deepest furrows, but 
that the local glacier passed N. and 8. It was also, doubtless, 
“ deflected” from its course, and the opposition of the Huro- 
sand. 
Thus it appears that not only was the outlet of Lake Su- 
perior through Little Bay de Noc up to the close of the Ter- 
tiary, but that it continued to exist there after the stratification 
of the drift. e curious excavation and piling up of the 
drift on either side of the Whitefish valley could only have 
been done since the deposit of the same, and the water-worn 
surface of the Trenton limestone, on the top of the water-shed, 
must have been produced since the dawn of the Terrace Epoch. 
Ann Arbor, Mich., August 20, 1870. 
* Foster and Whitney’s Report on L. Superior, Part I, p. 206. 
