W. W. Dodge—Lower Silurian Fossils in Maine. 485 
to be referred to the level of the Utica slate or the Hudson 
River formation. ° 
The locality is on the north side of the Wassatiquoik River, 
about a mile west of the East Branch of the Penobscot. The 
road to Katahdin Lake crosses the southern slope of Wassat- 
vised. A coarse ‘‘greenstone” forms a ledge near by; and the 
presence of intrusives doubtless accounts for the condition of — 
the flinty-looking slates. only rock noticed in the three 
miles to the westward is a dull, greenish, hydrous-looking 
eruptive, mostly in boulder ater-w pebbles in the 
nd show many cavities. : a 
The nearest observed outcrop to the eastward is of slate with 
an easterly dip, on the left bank of the East Branch, near the 
water at its summer level, about opposite the mouth of the 
Wassatiquoik River. This isa mile and a half north of the 
unt farm, two miles east of which the road crosses a slate 
ledge where the strata dip to the westward. e outcrops of 
this slate along the East Branch have been examined by differ- 
ent observers, and its strike and dip at many points recorded.t+ 
Maine and Massachusetts, 1838, pp. 20-24; ©. H. Hitchcock, Agric. and Geol. 
Maine, 1861, pp. 392. 393. 
