224 Wisconsin Academy of Sciences, Arts^ and Letters. 



ing that there are numerous points where it has formed over the 

 hill sides, and by associating in mention with it accumulations 

 on the "heights, apparently in no regular order," ^ As these are 

 deep, canon-like valleys, they would probably modify in some de- 

 gree, the comparatively thin margin of the glacier, giving it a 

 somewhat digitate outline, and the greatest accumulations would 

 take place near the extremities of the tongues, in the valleys, so 

 far as drainage permitted ; while the connecting chains would 

 form retreating lines, and be less conspicuous, and might, there- 

 fore, escape observation not definitely turned to the subject. This, 

 at least, is suggested by some observations of my own in similar 

 situations. Such valley accumulations, however, do occur at the 

 extremities of linear glacial lakes that are unconnected with a 

 definite belt, as in the case of Grreen Lake, Wisconsin.'^ 



On the line of the Erie E. K., along the small tributary of the 

 Delaware river that is followed up, westward, from Deposit, I 

 have observed winding Osar-like ridges, parallel to the valley, 

 and Kame-like hills upon the slope, up to the watershed of the 

 Delaware and Susquehanna ; likewise in the valley of the latter, 

 at and near the village of Susquehanna, but I have no knowledge 

 of their intimate structure, extent, or relations. 



In the southeastern district of New York, Prof. Mather recog- 

 nizes the distinctive aspect of this class of accumulations.^ He 

 cites several instances of its occurrence oq the east side of the 

 Hudson, leaving the impression that they are local features. But 

 on Long Island, it forms " an elevated ridge, called by some, 

 'Grreen Mountains,' and by others, the ' Backbone 'of the island."* 



This he describes in detail and maps, showing that it branches at 

 the east, one chain extending along the southern peninsula to 

 Montauk Point, and the other, along the northern to its extremity, 

 and, theoretically, to the islands beyond. 



Professors Cook and Smock have recently examined this, and 

 have shown its connection with a similar moraine, that stretches 

 across the northern part of New Jersey, from Perth Amboy to 



1 Loc. cit., p. 219. 2 Geol. of Wle., 1877, Vol. II, p. ISS. 



3 Nat. Hist. Sarv. N. T., Ist DIst , Pt. IV, p. 213. « Loc. cit., p. 161. 



