54 
ROCK FLOOR OF GREATER NEW YORK. 
[BULL. 270. 
Nummary of records of borings madt in AV/r York and vicinity — Continued. 
->. BOKlNtiS IN THE BOROUGH OF MANHATTAN— Continued.- 
Serial 
nuin- 
)>er. 
Depth of boring to fock. 
Location. 
A s given. 
Referred to 
I'. S. datum. 
Sandy Hook. 
Kind of tock, if 
known. 
Foundations of tall buildings— Cont'd. 
564 
Park Realty building, <>.">d streel 
and Madison avenue." 
-30 to -40 
Rock. 
565 
Fabbri residence, Easl <ilM streel 
near Fifth avenue. /( 
30to 40 
23 to 13 
Do. 
566 
Ansonia Hotel. 23d street and 
Broadway, near curb. ' 
-72 
-35 
567 
Hotel Belmont, southwest corner 
Park avenue and 42d street, 
near curl>.' / 
-20 
33 
568 
Center 41st streel opposite Hotel 
Belmont, on west side Park 
avenue."' 
- 5 
58 
569 
Macy building, 34th and 35th 
streets on B road way. « 
-26 
21 
570 
[mperial Hotel extension. Broad- 
way between 31s1 and 32d 
streets..'' 
Kil'th avenue <.l — 
3 to— 30 
39 to 12 
570a 
Northwest corner 14th street. . . 
-11 to 22 
25 to 14 
Rock or 
der. 
bowl] 
570 ft 
Plots 87-89, between 16th and 
17th streets. 
L2to 21 
29 to 20 
Do. 
570c 
Northeast corner 17th street ... 
L9to 28 
21 to 12 
Do. 
570d 
Southeast corner 17th street ... 
is to 23 
2:; to is 
Do. 
570< 
Southeast corner L8th street . . . 
into 36 
20 to 3 
Do. 
570/ 
Northwest corner 18th street .. 
17 to 27 
23 to L3 
Do. 
570p 
Southwest corner L8th street . . 
12 to 31 
28 to 9 
Do. 
570 h 
southwest corner 19th street . . 
23 to 27 
L7to 13 
Do. 
o7o; 
North we-t corner I'M 1 1 street .. 
-21 to 32 
19to 8 
Do. 
570 j 
Lot L37 (28f feel north of 20th 
street). 
34 to —43 
7 to 2 
Soft rock. 
570 A; 
Southeasl corner 20th street ... 
-33 to -36 
9 to 6 
Do. 
7,70/ 
Southwest corner 22d street 
-30to — 34 
8 to 4 
Rock or 
der. 
bowl- 
r,7o„ 
Northwest corner 52d street 
-37 to— 44 
8 to 1 
Do. 
o Engineering Record, vol. 11. L901, p. L2. Below the bottom of the cellar of the old building which 
formerly occupied the site. Rock presumably gneiss. 
b idem, vol. 39, 1898, p. 31. old stream valley. Rock presumably gneiss. 
ddem, vol. 47, 1902. pp. 50-51. 'Cellar excavated in solid rock:" depths approximate. 
rildem, p. 146. "Rock surface rises toward south at steep angle." 
eldem, vol. 18, 1903, p. 332. I Maximum.) 
/Idem, vol. 49, 1901. p. 184. Surface "very irregular, dropping vertically several feet in a nuinher 
Of the pits. Many seams were encountered which were filled with chlorite of the consistency of voft 
putty." 
a Records 570a-5702 furnished by Mr. Robert Maynicke, architect, 726-727 Broadway, New York City. 
