prosser.i SECTIONS NEAR PORT JERVIS. 39 
Loxonema hamiltonise Hall (rr) 
Strophodonta sp (rr) 
Discina sp (rr) 
Orthoceras sp (rr) 
Bryozoa 
Prof. White described the upper portion of the Sawkill Canyon as 
follows: "Beginning one-quarter of a mile up the stream from the 
main falls, we find the Sawkill flowing between banks of drift, which it 
iiere cuts through, and vapidly excavates a long narrow canyon out of 
the Genesee shale. This trench is 110 feet deep where the falls begin, 
only about 50 feet wide at top, and 10 to 15 feet at the bottom. The 
first descent is a fall of 20 feet in two cascades over the fossil coral bed 
at the base of the Genesee ; then the stream spreads out on a broad 
gently sloping platform of gray Hamilton rock, to fall into the great 
abyss below in a vertical plunge of 00 feet. * # * The fossil coral 
bed at the top of the large fall is a dark blue slaty rock filled with corals, 
and also many fossil shells." l 
SECTIONS NEAR PORT JERVIS, N. Y. 
No. 1477 A — 1. — At the northern end of the city near the base of the 
steep hill is an exposure of bluish-black line shales, which are probably 
Marcellns, and above, up the steep hillside, are ledges of coarse, are- 
naceous shale, which are of Hamilton age. The exposure is at a point 
where riprap has been taken out extensively for the streets of the city. 
No. 1477 Al. — The ledges forming the high hill immediately north 
of Port Jervis are composed of coarse arenaceous shales and sandstones, 
which belong to the lower part of the Hamilton stage. 
Fauna of No. 1477 Al. 
■ 
Tropidoleptus carinatus (Con.) Hall '. (rr) 
Spirifera medialis Hall (rr) 
Spirifera mucronata (Con.) Bill (rr) 
Cyrtina hamiltonensis Hall (rr) 
Bryozoa. 
No. 1477 A2. — A ledge of coarse-grained sandstone with coarse are- 
naceous shales, on eastern side of the road, lh miles north of Port Jervis. 
This is the first ledge after passing those so well exposed in, and extend- 
ing a mile north of, Port Jervis. Some of the layers of this ledge con- 
tain great numbers of shells, principally Spirifera granulifcra Hall. 
i 
Fauna of No. 1477 A2. 
Spirifera grannlifera Hall (aa) 
A large number of specimens in a coarse-grained sandstone, which is very 
much indurated, and most of the specimens are internal or external 
impressions on which the finer markings are not preserved. Some of 
the specimens may be S. medialis Hull, but owing to the condition of 
preservation it is hardly possible to identify them. 
1 G G , p. 199. 
