1880.] 433 [Stone. 
locks, and short ridges or bars of apparently the same origin as the 
kames, but thus far they cannot be classified into long systems. All 
who have travelled north of the grand divide speak of the compar- 
ative absence of gravel in that region, and even the valley drift is 
far less in amount than that found in the valleys of the southern 
streams. The kames proper are a feature of the southern slope, 
except in the extreme east, where they reach into the valleys of the 
Aroostook and Medunxnekeag, tributaries of the St. John. It should 
be noted that the valley of the St. John itself slopes southward in 
that part of its course. 
THE SUPERFICIAL Deposits oF MAINE. 
Ever since the publication of the views of Prof. Otto Torell as to 
the drift of eastern North America (American Journal of Science, 
Jan. 1877), the writer has regarded the classification proposed by 
that eminent glacialist as substantially representing the succession of 
glacial deposits in Maine. This is the same classification adopted by 
Prof. C. H. Hitchcock, and by Mr. Warren Upham, of the N. H. 
Geol. Survey, and like them the writer for the most part employs the 
Scotch names. The following list of glacial and post-glacial deposits 
observed by the writer in Maine, is appended as an explanation of 
the terms employed in the descriptions that follow. Beginning with 
the lowest, the order of succession of the superficial deposits is as 
follows: . 
1°. Tue Lower Ti, supposed to be the ground moraine of 
the continental glacier. A tough, stony clay, commonly called hard- 
pan, with intercalated masses more sandy or gravelly in composition; 
color grayish or bluish, boulders usually small and for the most part 
glaciated. ‘This formation appears to consist of the pre-glacial soil, 
together with such of the underlying rock as could be broken and 
planed off by the glacier. Generally the weathered parts of the 
rocks were thus planed off but not always. At Brownville, where 
the laminae of slate are nearly vertical, the lower till filled up the 
spaces between ragged tooth-like projections of the weathered slate, 
and the glacier flowed in over the whole, in some cases not breaking 
even thin plates which project two inches or more, and are without 
any backing whatever except the compacted till. At Russell Moun- 
tain in Blanchard, high granite cliffs facing the south are deeply frac- 
tured into blocks which have been weathered and rounded in situ, 
‘PROCEEDINGS B. Ss. N. H. — VOL. XX. 28 MAY, 1881. 
