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IKEY, GEOLOGY OF SOUTHERN MANHATTAN ISLAND 271 
North River Front. 
Location 
Depth 
to rock 
M. L. W. 
To Rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
Pier 1 (Old) 
Battery Place 
-35.2' 
-37.53' 
2.3' 
Not found. 
Pier 3 (Old) be¬ 
tween Battery PI. 
and Morris St. 
-40.2' 
-44.53' 
4.8' 
? 
Only pegmatite and 
pieces of trap saved.- 
Pier 6 (Old) near 
Rector St. 
—42.2' 
-44.53' 
1.0' 
Not found. 
Pier 10 (Old) 
near Carlisle St. 
-46.09' 
-48.42' 
3.0' 
Manh.? 
Only mica scales recov¬ 
ered mixed with pebbles. 
Pier 39 (Old) 
Desbrosses St. 
-81.36' 
-83.69' 
1.17' 
No bed-rock saved. 
Pier 13 (Old) 
near Albany St. 
-40.51' 
-42.84' 
0.67' 
Manh. 
Only mica scales recov¬ 
ered. 
Pier 18 (Old) 
Cortlandt St. 
-44.35' 
-46.68' 
1.5' 
■ “ 
Mica schist. 
Pier 24 (Old) 
near Vesey St. 
-51.08' 
-53.41' 
1.0' 
No bed-rock saved. 
Pier 28 (Old) 
Murray St. 
-75.44' 
-77.77' 
8.91' 
Manh. 
Mica schist (typical) and 
granite. 
Pier 30 (Old) 
Chambers St. 
-85.65' 
-87.96' 
- 2 . 21 ' 
Schist, not typical, finer 
grained than usual. 
Pier 35 (Old) 
Franklin St. 
-78.36' 
-80.69' 
-2.58' 
Mica schist. 
Pier 38 (Old) 
Hubert St. 
-80.11' 
-82.44' 
-3.17' 
“ 
“ “ , typical. 
Pier 42 (Old) 
near Canal St. 
-80.08' 
-82.41' 
-4.34' 
“ 
“ “ finer grained 
than usual. 
Pier 45 (Old) 
Charlton St. 
-36.17' 
-38.50' 
-2.59' 
No rock saved. 
Pier 49 (Old) 
Leroy St. 
-85.90' 
-88.23' 
-S.17' 
Manh. 
Mica schist, typical. 
Pier 51 (Old) 
Christopher St. 
-124.00' 
-126.33' 
—1.75' 
Pier ft. of Beth- 
une St. 
-157.97' 
-160.30' 
0.S3' 
No rock saved. 
Pier 60 (Old) W. 
13th St. 
-196.0' 
0 
No rock. 
Pier ft. of 23rd 
St. 
-175.16' 
-177.49' 
5.65' 
Manh. 
Mica schist, typical. 
Pier ft. of 30th 
St. 
-149.41' 
-151.74' 
2.58' 
“ ? 
Fragments of quartzite 
& mica. 
Pier ft. of 3Sth 
St. 
- 84 . 78 ' 
-87.11' 
5.33' 
Mica, schist, typical. 
Pier ft. of 46th St. 
-49.79' 
-52.12' 
4.50' 
Piece of white granite, 
either a granite dike or 
Fordham. 
Pier ft. of 57th 
St. 
-28.SS' 
-31.21' 
5.08' 
Manh. 
Mica schist, typical. 
