608 
GEOLOGY OF THE FIRST DISTRICT. 
LOCALITIES. 
KINGS COUNTY. 
lINNE.1900..IGneissoid rooks.INear Astoria. 
2 do .90°...... Gneissoid rocks and horn- Hurlgate. 
I I I blende | 
NEW-YORK COUNTY. 
N20O to 30° E. 
N 30® E; varies 
from this to N 
N30OE . 
Gneiss, micaceous. 
Westward 50° to 80® . 
Vertical. 
W 80®. 
Westward 80® to 85® 
do 85® to 90® 
Westward 80® to 85® . 
N 30® E ., 
N250 to 30® E. 
N25®E 
At corner of Third avenue and 50th-street, covered 
with drift scratches. The strata for some distance 
north and south of this, dip to the N and NW from 
30® to 80°; but at 77th-street the rock resumes its 
usual dip to the ESE. 
Hurlgate ferry, at the east end of 86th-street. 
Gneiss.. 
Gneiss and hornblendic 
gneiss 
Anthophyllite rock and 
gneiss 
Gneiss. 
Gneiss abounding in quartz 
veins, and covered with 
drift scratches; N 30® 
Prom the city to the north end of the island. The 
strike and dip are indicated in various parts of the 
island, on the map of th e island on PI. 1, fig. 2. 
Blackwell’s island. 
At Hurlgate. 
From 59th-street to 63d-street, and between Tenth 
avenue and the Hudson. 
On the shore of the Hudson opposite the Orphan 
Asylum. 
On the shore of the Hudson at 75th and 77th streets. 
do 
Gneiss covered with drift 
scratches 
Gneiss with veins of gra¬ 
nite 
Gneiss and granite worka¬ 
ble for common purposes 
Gneiss, tortuous . 
Eastward 85® to 90® 
N C5®, W. 85® 
Ineiss.. 
Granite bed, above grading 
175 feet E and W, am 
410 feet N and S 
Gneiss, fissile. 
Gneiss. 
neiss covered with drift 
grooves 
Gneiss covered with drift 
scratches and granite 
veins 
Gneiss and grooves 
Between the Bloomingdale road and Hudson river. 
Vide PI. 37, fig. 2. 
At the quarry opposite Burnham’s hotel. 
At No. 4, on PI. 37, fig. 2, of drift scratches. 
From J. K. Howland’s country seat, 600 or 800 yards 
north. 
On Eighth avenue and 28th-street. 
do 
and 3Gth-street. 
do and 38th-street, on east side of 
avenue it has been quarried. 
25 rods east of the last. 
On Eighth avenue and 41st and 42d-streets. 
Gneiss and drift scratches 
do and 50th street, 
do and 54th and 55th-streets. 
do and 58th street, on the east side 
of the avenue and west side of the Bloomingdale 
road near the junction. 
Near the junction of the road and avenue, northwest 
from it 100 yards, and northeast from it the grooves 
cover almost the whole surface. Grooves N 45 ° W. 
Near Mr. Howland’s residence. 
A few rods south of the six-mile stone. 
Near Mr. Francis, north of the sixth milestone, cor¬ 
responding to 96th-street. 
Near Mr. Darkes, on the east side of the Blooming¬ 
dale road. 
Bloomingdale road and 109th-street. 
East and west side of Bloomingdale road near Luna¬ 
tic A sylum. 
By the lane leading to the Lunatic Asylum. 
Bloomingdale road and 116th-street. 
In the first battery or redoubt south of Manhattan- 
ville. 
