440 NEW YORK STATE MUSEUM 
of approximately 100 feet above river level. The rock here is some- 
what thin bedded. A small quarry has been opened in medium 
thick layers of Calciferous in the side of the hill back of the streets 
about three quarters of a mile east of the depot, and the rock is 
rather dark blue and fine grained. Near the point where the high- 
way crosses the small creek a short distance east of this quarry is a 
larger quarry in the same rock in the bed of the creek. Following 
the course of this creek northward the lower members of the Tren- 
ton stage are seen in the creek bed and banks at an altitude of about 
220 feet above river level. Nearly due east from this point the 
lower beds of the Trenton are again exposed in the bank of the 
next creek east of the last mentioned creek, and at this point have 
been quarried to some extent. Certain portions of the rock are 
covered by a stalactitic incrustation. 
Near the southern bank of the same creek just east of the highway 
which runs through Mannys Corners! is a small quarry in which the 
following section was measured (46B): 
B® Thin bedded to shaly layers of limestone. : 
Trenton. Ing 19) Go 
B? Bluish gray, thick bedded limestone divid- 
ing into thinner layers on long exposed surfaces. 
Contains corals, brachiopods and crinoids. Tren- 
ton. pi 124 
B! Massive, dark gray, thick bedded limestone 
abounding in corals (Streptelasma). Black 
river? arash 
No. I may belong to the Black river horizon, but is not referred 
definitely to it inasmuch as the characteristic fossil (Column- 
aria) of that horizon was not found. Not far east of this quarry 
is a larger quarry in Trenton limestone of medium thin layers, dark 
blue, semi-crystalline and showing very black on the upper surfaces 
of the layers owing to the deposit of carbonaceous shale between 
successive deposits of calcareous material. Such a black film of car- 
bonaceous material is often to be seen on the surface of layers of the 
Trenton limestone. About one half mile east by southeast of this 
point the Trenton limestones form the cap of an insulated hill or 
This place is given on some of the earlier state maps and atlases as Mannas 
Corners. 
