260 
ANNALS NEW YORK ACADEMY OF SCIENCES 
a) South Ferry {New York) to Joralemon St. {Brooklyn), across East River. 
Serial No. 
Original 
Mark 
Location 
Depth 
to rock 
M. H. W. 
To Rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
1 
1 
3.210' E. of end 
of pier 4, E. R. 
No rock at -63.31'. 
2 
2 
1,558' E. ditto 
No rock at -97.51'. 
3 
3 
1,9S8' E. ditto 
No rock at -S6.71'. 
4 
4 
2,145' E. ditto 
-56.7' 
-53.98' 
21.3' 
Manh. 
Hornblende-biotite- 
quartz schist, not typical. 
5 
5 
1,152' E, ditto 
-69.0' 
-66.28' 
20 1' 
Mica schist, regular type. 
6 
6 
510' E. ditto 
-54.8' 
-52.08' 
27.2' 
“ 
Hornblende-biotite- 
epidote-quartz schist, not 
typical. 
7 
7 
857' E. ditto 
-62.24' 
-59.52' 
14.96' 
“ 
Core not seen. 
8 
8 
Pier No. 4 (end) 
-30.0' 
-27.28' 
41.0' 
Garnetiferous and peg- 
matitic Hornblende- 
biotite schist. 
9 
9 
Pier No. 3 (near 
end) 
-27.9' 
-25.18' 
31.8' 
“ 
Mica schist, curly, com¬ 
mon type. 
10 
10 
South St. and 
Whitehall . 
-22.2' 
-19.48' 
20.5' 
“ 
Common type with pear¬ 
ly mica. Lies rather flat. 
b ) Old Slip {New York) to Montague St. {Brooklyn ), across East River. 
11 
3451 
Near Old Slip 
-36.0' 
-33.28' 
21.0' 
Manh. 
Coarse, curly mica schist. 
Core 14 ft. 
12 
3452 
800' E. of pier 
headline 
-49.0' 
-46.28' 
11.0' 
9 
Hornblende schist core 9* 
ft. Probably Manhattan. 
13 
3453 
1040' E. ditto 
-53.0' 
-50.28' 
11.0' 
Ford. 
Granitic gneiss 50-60° 
dip, core 9 ft. 
14 
3454 
1425' E. ditto 
-71.0' 
-68.28' 
8.0' 
? 
Pegmatitic granitic 
gneiss, probably Ford- 
ham. 
15 
3455 
Pier (Brooklyn) 
No rock at -71.51'. 
c) Maiden Lane {New York) to Pineapple Street {Brooklyn ), across East River. 
16 
3456 
400' E. of pier 
headline 
-67.0' 
-64.28' 
11.0' 
Ford. 
Granitic gneiss dip verti¬ 
cal, uniform core 9 ft. 
d) Beekman St. {New York) to Cranberry St. {Brooklyn), 
across East River. 
17 
3457 
925' E. of pier 
headline 
-95.0' 
-92.28' 
3.0' 
9 
Mica schist probably 
bowlders. 
18 
3458 
/ 
100'+ E. of pier 
lreadline 
Rock or bowlders at 
-91.51'. 
