618 
GEOLOGY OF THE FIRST DISTRICT. 
LOCALITIES. 
SE, high angle . 
Conglomerates, slates, etc. 
like those of Bellevak 
mountain, Skiinnemunk, 
ESE 60® to 70° . 
NNE 40° to 50° 
Gneiss with beds of granite 
Northward .... 
N50°E. 
do 
NNE and NE 
NNW . 
NNE . 
SE, high angle nearly 
vertical 
ESE and SE 
Gneiss, underlies the mag¬ 
netic iron ore 
Limonite, bed like that of 
Townsend’s mine 
Red and. other slates, grits 
and limestone 
Gneiss and hornblendic 
[neiss, with veins and 
jeds of granite 
Gneiss and various rocks . 
Captain Faurot’s quarry, between Fort-Montgomery 
and West-Point. 
Below Fort-Montgomery, at and near Mrs. Pell’s. 
The strata of gneiss with beds of granite, on Wag¬ 
gon’s islands in the Horserace, between Fort Mont¬ 
gomery and the eastern point of the Dunderberg, are 
transverse in many places, viz. the strike from west- 
northwest to east-southeast, and dip variable. This 
seems to be on one of the transverse axis of eleva¬ 
tion, viz. the one from Peekskill, and farther east by 
Anthony’s-nose and the Dunderberg, Fort Mont¬ 
gomery, and so on farther west-northwest, along 
which in many places the strata have a strike to the 
northwest, west-northwest and west, with a dip vari¬ 
able north or south, and the rocks often in great confu- 
over a breadth of one-half to a mile from north- 
to southwest. 
Forshee mine, Monroe. 
About two miles north of Woodbury furnace, north¬ 
west of the Highland mills, one-half mile east of 
the mills, and also south of them on the road side. 
Townsend’s mine in Canterbury, and near the High¬ 
land mills. 
From Greenwood furnace to the Ramapo works. 
Eastward 60° to 90°.. 
NW.. 
About WNW 
WNW about 70°.., 
do 
N 20° E . 
N to W.. 
NNE ... 
ESE 40° to 60° . 
Vertical. 
EtoE6°to 12°, 
Gneiss, limestone, and au 
gitic rocks, with granite 
Impure limestone, contains 
pyrites, augite, serpentine, 
etc. 
Gneiss, and hornblendic 
gneiss 
Magnetic oxide of iron, in 
gneiss and hornblendic 
gneiss 
do 
do 
Gneiss, granite, and lime¬ 
stone 
Gneiss, with granite and 
magnetic oxide of iron 
Gneiss, traversed by a trap 
dyke several yards wide ' 
Many places about Fort Montgomery on the axis of 
disturbance, ranging west-northwest, and east- 
southeast by Fort Montgomery. 
Between Fort Montgomery and West-Point. The 
dip at high angles may be seen all along the rocky 
shore, and especially near Buttermilk falls, both 
north and south in high cliffs, and opposite Block¬ 
house point and the hospital near West-Point. 
Near Mr. Potter’s, one mile northwest of Fort Mont¬ 
gomery. 
Near the Cascade, about one-half mile from Wash¬ 
ington valley, and one and a half from West-Point. 
This is on a transverse axis passing through Con¬ 
stitution island. 
Kronkite’s iron mine, about five miles- southwest of 
West-Point, Cornwall, 
Forest of Dean iron mine, in the town of Cornwall. 
Vide PI. 5, fig. 9. 
At the locality of white limestone, near Duck-cedar 
pond. Vide PI. 5, fig. 11. 
At Stirling iron mines, Monroe. Vide PI. 30, figs. 4 
and 5. 
On the summit of the mountain, between Grassy 
point and CLueensbury forge, west of the pass of 
the Tymp. 
tain region of Orange and Rockland counties. Many w 
d, but the localities of few 
