930 ROLLIN D. SALISBURY 



correlation with that which overlies much of the drift of the 

 Kansan and lowan epochs, while the lower is presumably the 

 equivalent of some or all the loess beneath the lowan and above 

 the Kansan drift. 



Heretofore loess has not been known to occur in or above 

 the drift of the Wisconsin epoch ; but during the past summer 

 it has been found in connection with this formation at several 

 points in Wisconsin, namely, near Green Lake, Devils Lake, 

 and Ablemans. 



Loess 7iear Gree?i Lake. — Loess occurs in at least two 

 localities near Green Lake, in Green Lake county. One of these 

 points is about two miles northeast of the village of Dartford in 

 the S. W. ^ of Sec. lo (Tp. i6, R. 13 E.), where the loess is 

 worked as molding sand for brass foundries. The loess here was 

 not seen to contain shells or concretions, and is calcareous only 

 at its base, and there but slightly. Its texture is fairly normal. 

 It is exposed to the depth of eight or ten feet. The loess at 

 this point is between 150 and 200 feet above Green Lake, and 

 near the crest of one of the many high ridges of the region, 

 the summits of which represent an old base plain. Its sub- 

 stratum is till of the Wisconsin formation. 



The other point where loess is found is at the west end of 

 the lake in Sec. 4 (Tp. 15, R. 12 E.). The loess here is at a 

 lower level, and on a slope which faces the lake. As in the 

 other case, it overlies the drift of the Wisconsin formation. 

 The loess at this second locality is of greater thickness than at 

 the first, and is normal in texture, color, structure, and compo- 

 sition. It is calcareous, and has the roughly columnar structure 

 which frequently characterizes loess exposed in vertical faces, 

 and contains both the common types of gastropod shells, and 

 calcareous concretions, though neither is plentiful. Its char- 

 acter is in every way such as to allow of no doubt of its 

 being normal loess. Near its base it is interstratified with 

 gravel. 



The loess in the vicinity of Green Lake is of special interest, 

 not only because of its association with the deposits of the last 



