ANNALS NEW YORK ACADEMY OF SCIENCES 
26 S 
d) Long Island City Pier. (Continued .) 
Serial No. 
Original 
mark 
Location 
Depth 
to rock 
M. H. W. 
To rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
104 
7 
“Extra hole” 
between 1 and 6? 
-37.4' 
-35.06' 
Ford. 
Granitic gneiss. Banded 
type. ■ 
105 
8 
Not found. 
106 
9 
“ 
107 
10 
“L. I. City” 90' 
N. E. of pier 
-19.7' 
-17.36' 
Ford. 
Granodiorite. 
10S 
11 
“L. I. City,” 60' 
S. of pier 
+ 3.5' 
+ 5.84' 
Granitic gneiss, banded. 
109 
12 
“L. 1. City” 30' 
s 
-9.6' 
-7.26' 
“ 
“ “ “ 
110 
13 
“L. I. C.” N. 
end of pier 
-0.5' 
+ 1.84' 
“ 
Biotite gneiss, slightly 
banded. 
111 
14 
“L. I. C.” 50' 
N. E. 
+ 5.3' 
+ 7.64' 
? 
Biotite hornblende gneiss 
(uncertain). 
112 
15 
“L. I. C.” 45' 
E. Near center 
line 
+ 7.6' 
+ 9.94' 
Ford. 
Granitic gneiss, banded 
type. 
113 
16 
“ L. I. C.” center 
line 
+ 1.2' 
+ 3.54' 
? 
Mica schist, garnetifer- 
ous (uncertain). 
Bridge No. 5 
This is a projected bridge whose location would be adjacent to the old 
Brooklyn Bridge No. 1, on the Northeast side. The cores are now in the 
offices of the Bridge Department, Park Row Building. All are fully 
labeled. The datum is M. H. W. and is 1.72' above mean sea level (U. 
S. datum). 
a) Manhattan side. 
Serial No. 
Original 
mark 
Location * 
Depth 
to rock 
M. H. W. 
To Rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
114 
A 
Between L. I. 
City Ferry & 
B’way Ferry 
-121.75' 
-120.03' 
7.75' 
Ford. 7 
Banded gray mica gneiss, 
(not typical). 
115 
B 
B’way Ferry 
-112.75' 
-111.03' 
6.05' 
“ ? 
Hornblendic gneiss not 
typical. 
116 
C 
S. margin of 
B’way Ferry 
-96.90' 
-95.18' 
6.35' 
Ford. 
Granitic gneiss, light, 
striped, 60° (satisfactory 
Fordham.) 
117 
D 
-- 
Between B’way 
Ferry & Brooklyn 
Bridge pier 
-88.SO' 
-87.08' 
7.45' 
“ ? 
Hornblende rock and 
granitic gneiss. 
118 
E 
N. end of Brook¬ 
lyn Bridge pier 
7 
-84.40' 
-82.68' 
9.0' 
“ ? 
Granitic gneiss and peg¬ 
matite. 
