608 
GEOLOGY OF THE FIRST DISTRICT. 
Strike. 
N35^E.,..., 
N30<^E.. 
N450E.. 
N30O E.. 
N40O to 450 E 
Kind of rc 
LOCALITIES. 
Westward 50° to 80° 
do 45° . 
do 45° to 50° 
Vertical.. 
Varies from eastward 
80° to 85° to west¬ 
ward 80°‘to 85°' 
ESE80° to90° . 
Gneiss, fissile and decompo¬ 
sing 
Gneiss with few veins co¬ 
vered with drift scratches 
Gneiss 
do 
Gneiss, inferior quality ... 
Vertical . 
Gneiss containing pyrites 
oxide of iron. 
Gneiss with grooves, N 45° 
SE85° to 88°..., 
SW 75° to 85° .. 
S50°, E75° to 80° and 
N25°E . 
N35°E 
Vertical, 88° westward 
some places 
Nearly vertical . 
Gneiss traversed by nume¬ 
rous granite veins 
Gneiss without any veins.. 
N25° to 30° E. 
N 45° E. 
Eastward 60° to 75° .. 
SE 45°, tortuous . 
do 
Very confused, 
Along the north end of Bellevue enclosure. 
First avenue and 35th-street on shore. 
Mott’s quarry near 37th-street and First avenue. 
48th to 50th-street, cliffs on the shore. 
From the Shot tower to 79th-street. 
On the shore at 79th-street; 
Prom 79th-street to Third avenue, where the rocks 
are visible. 
From 79th to 82d-street. 
From 82d to 86th-street along shore. 
Hurlgate ferry, 86th-street. 
Along the shore from 86th to 94th-street, where the 
rock is exposed. 
i NNW of Harlem bridge on the shore at-intersec¬ 
tion of 142d-street and Seventh avenue. 
Ridge on a line with Seventh avenue, and extending 
north-northeast toward* M'Comb’s dam. 
On a line with the Ninth avenue, 100 rods northwest 
of M'Comb’s dam. 
At Tenth avenue and 162d-street,- on Madame Gem- 
mel’s place. 
About half a mile northward, at the tenth milestone 
on the Kingsbridge road. 
In the valley at 204th-street. 
Nearly opposite, or a little beyond Tubby hook on 
the Hudson. 
Old abandoned quarries about a mile from the north 
end of New-York island. 
A few rods north of the old tide mill, 
if On Tenth avenue ridge, forty or fifty feet high be¬ 
tween 32d and 37th-streets. 
On Tenth avenue between 42d and 44th-street. 
NWand SE .. 
° to30°E. 
N 15° to 20° E. 
N 30° E. 
N 10° W. 
N 30° E. 
do . 
N and S.. 
N 30° E. 
W75°.. 
N70° to60°, W70< 
80° 
Vertical .. 
N60°W80° - 
Vertical . 
N60° W80°.. 
Vertical.. 
W80°. 
Vertical... 
Gneiss with large veins 
coarse granite 
Gneiss and granite mixed 
in great confusion 
Mostly granite, a few thin 
strata of gneiss, sound and 
workable but rather coarse 
Gneiss with large veins of On Tenth avenue, between 48th and 50th-streets. 
granite ten to twenty feet 
wide, of good quality for 
building 
Gneiss, ... 
Gneiss, ten feet above grad¬ 
ing, and extends 200 feet 
and disappears under the 
soil. Strata contorted with 
veins of quartz and granite 
in every direction 
Gneiss with veins of quartz 
Gneiss, with veins of coarse 
granite 
Gneiss with granite veins, 
Gneiss . 
do 
do with veins of gra¬ 
nite 
Gneiss confused by the in¬ 
trusion of granite 
Gneiss full of granite veins, 
disintegrating 
Gneiss covered- with drift 
scratches, N 35° W 
On Ninth avenue and 42d-street. 
Between Ninth and Tenth avenues rock emerges 400 
feet north and south, and 150 feet east and west. 
On Ninth avenue, and 52d and 53d-streets. 
do 56th and 57th-streets, 
On Tenth avenue, and 63d to 64th-street; 
do 63d-street. 
do 
do‘ 
67th-street. 
68th and 69th-streets. 
70th-street. 
