436 W. W. Dodge—Lower Silurian Fossils in Maine. 
One of the most noticeable facts connected with the presence 
of this rock between Molunkus and Sherman, along the post- 
road from Mattawamkeay to Patten, is the large amount of 
clear-white, fine-grained quartz rock scattered by the roadside. 
The road from Sherman (No. 8, of Range V), to the Hast 
Branch at the Hunt farm, gives a good line of section nearly at 
a right angle across the line of strike there prevalent, and by 
comparison of the dips near the road and elsewhere, it seems to 
cross not less than four anticlinals and five synclinals. The 
western portion of the road is through woods. There is a 
large exposure of nearly vertical beds on the west side of Swift 
rook. Between the brook and Sherman, a distance of five 
miles through partially cleared country, the road crosses four 
long ridges of high land, whose direction is that of the strike of 
the underlying rocks. Upon the hills the strata crop out 
occasionally, and in the valleys between flow small streams at 
regular intervals of a little over a mile from each other. On 
the hill just south of the village of Sherman, and near the line 
between Nos. 2 and 3, the slate shows a high dip westward. 
Glacial.—The parallel courses to which so many of the long, 
narrow lakes and large and small streams of the northern part 
of Maine conform, appear to indicate the undeviating direction 
of primary glacial erosion in that region. The course of trans- 
orted bowlders agrees well with this, as in the case of the 
imestone in sttu in No. 4, R. [X,* observed in scattered bowl- 
Kast Branch, in No. 2, R. VIL+ The uniform shaping of re- 
sistant ledges, such as may be seen at Mt. Kineo, and as is 
usually divergent. ‘T’o the two localities of the occurrence of 
ratios bowlders from an unknown source named by Professor 
itechcock—north end of Churchill Lake in No. 9 of R. XII, 
and No. 5 of R. VIII,|—-may be added the site of one, high on 
the hillside above the East Branch opposite the Wassatiquoik. 
The granite pebbles in the bed of the Wassatiquoik at the dam, 
four miles above its mouth, may belong to the Katahdin mass, 
but the extent of the area occupied by this has not been defi- 
nitely determined. The “porphyry” on Soper Brook, in 
No. 8 of R. XII, may well be the source of the pebbles of 
porphyritic black felsite with quartz grains found at this dam. 
* Agric. and Geol. Me., 1862, p. 321. Ib. 1861, p. 393. 
f Thorean, Maine Woods, pp. 262, 277. § Agric. and Geol. Me., 1861, p. 411. 
. 40 fb. p. 411. 
Cambridge, Mass. 
