BERKEY, GEOLOGY OF SOUTHERN MANHATTAN ISLAND 281 
Serial No'. 
Original 
mark 
Location 
Depth 
to Rock 
To Rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
300 
4 
Montgomery & 
Madison Sts. 
84' 
-65.5' 
4.4' 
Ford. 
Granodiorite. 
301 
5 
Montgomery & 
Cherry Sts. 
95' 
-71' 
15.2' 
Granodiorite. 
302 
8 
Norfolk & Grand 
Sts. 
166' 
Cl 
d 
CO 
1 
94.5' 
Inw’d. 
Coarse crystalline lime¬ 
stone. Upper 60 feet 
much decayed. 
303 
9 
Foot of Clinton 
St. 
56.8' 
— 4S' 
7.6' 
Ford. 
Granodiorite. 
304 
15 
Ludlow & De- 
lancey Sts. 
169' 
-133' 
44.3' 
Inw’d. 
Coarse crystalline lime¬ 
stone. 
305 
25 
Eldredge & De- 
laneey Sts. 
108' 
-68' 
8' 
Ford. 
Gneiss. 
306 
28 
Delancey St. & 
Bowery 
113' 
-72' 
19' 
Manh. 
Mica schist. 
307 
40 
Bowery & Stan¬ 
ton St. 
101' 
-54' 
14.5' 
Mica schist. 
The following borings have been made in the East River from the Foot 
of Clinton Street, Manhattan, to the foot of Bridge Street, Brooklyn. 
Serial No. 
Original 
mark 
Location 
Depth 
to rock 
To rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
308 
21 
Distances from 
Manhattan pier 
head 225' 
-65' 
16.4' 
Ford. 
Granodiorite in good 
sound condition. 
309 
53 
350' 
-72' 
20.2' 
310 
32 
525' 
-71' 
11.3' 
“ 
311 
50 
695' 
-76' 
20' 
312 
34 
860' 
-74' 
9' 
313 
41 
960' 
-81' 
20.8' 
314 
39 
1070' 
-67' 
30.8' 
The above borings of the Board of Water Supply (Nos. 300 to 314) have 
all been made since the original report was handed in. They are here in¬ 
cluded with the original tabulation because of the support they give to the 
revised geology of Manhattan Island. Boring is still in progress in the 
Lower East Side district and when completed a more accurate map will be 
possible. 
