270 
ANNALS NEW YORK ACADEMY OF SCIENCES 
East River Front. 
Serial No. 
Original 
mark 
Location 
Depth 
to rock 
M. L. W 
To Rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
123 
8 
Pier 1, (Old) 
Battery 
-23.99' + 
? 
0 
No bed-rock secured. 
124 
9 
Pier 2 (Old) 
Whitehall St. 
-18.77' + 
? 
0 
.... 
All trap bowdders. 
125 
10 
Pier 6 (Old) 
Coenties Slip 
-20.94' + 
? 
0 
No bed-rock secured. 
126 
11 
Pier 9 (Old) be¬ 
tween Coenties 
Slip & Old Slip 
-29.93' + 
? 
0 
127 
12 
Pier 12 (uld) 
Old Slip 
-30.95' 
-33.28' 
3.67' 
Manh. 
Mica schist , typical. 
128 
13 
Pier 15 (Old) 
Wall St. 
-53.23' 
-55.56' 
1.70' 
129 
30 
Pier 18 (Old) 
Maiden Lane 
-159.89' 
-162.22' 
3.50' 
130 
31 
Pier 21 (Old) 
Burling Slip 
-135.91' 
-138.24' 
2.25' 
131 
32 
Pier 24 (Old) 
Near Peck Slip 
-146.62' 
-148.95' 
2.75' 
Garnetiferous and peg- 
matitic mica schist. 
132 
33 
Pier 28 (Old) 
Near Roosevelt 
St. 
-98.06' 
-100.39' 
2.66' 
Mica schist, typical. 
133 
34 
Between Pier 33 
and 34 (Old) near 
Catherine Slip 
-108.79' 
-111.12' 
2.67' 
Ford. 
All pieces are fine grained 
micaceous gneiss, prob¬ 
ably Fordham. 
134 
35 
Pier 27 (Old) 
near Market Slip 
-85.28' 
-87.61' 
2.5' 
Material not found. 
135 
36 
Pier 41 (Old) 
Pike Slip 
-90.99' 
-93.32' 
5.16' 
Manh. 
Mica schist with one 
limestone fragment. 
136 
37 
Pier 43 (Old) 
Rutgers Slip 
-109.43' 
-111.76' 
3.17' 
Mica schist. 1 
137 
38 
Pier 46 (Old) 
Jefferson St. 
-51.0' 
-53.33' 
2.66' 
Mica schist, typical. 1 
138 
40 
Pier 49 (Old) 
near Clinton St. 
-30.86' 
-33.19' 
3.34' 
Ford. 
Granite gneiss clear gra¬ 
nitic type, similar to 
Yonkers. Unless it is a 
large bowlder, the bed¬ 
rock is surely Fordham. 
139 
41 
Pier 52 (Old) 
Gouverneur Slip 
-66.56' 
-68.89' 
1.33' 
“ ? 
Granite gneiss, fine 
grained, with very small 
garnets. 
140 
30 
Pier 19 (Old) 
Fletcher St. 
-142.7' 
-145.03' 
10.65' 
? 
Material not seen. 
1 Recent exploratory work throws some doubt on the validity of these two borings. It is 
probable that the material recovered came from bowlders instead of bed rock. 
