254 NEW YORK STATE MUSEUM 



offered as the writer's interpretation of borings to date, and its 

 more direct use is as a working basis and guide in conducting ex- 

 plorations. The western half of the section may be accepted as 

 more accurate in minor detail than the eastern. 



To simplify the section it is drawn on a line crossing this zone 

 more directly than the conduit as laid out, i. e. through holes 28 and 

 5 and the borings are projected along the strike of the formation 

 to the section line. All the data therefore are used and the structure 

 is not distorted, but the distances through each bed would be greater 

 on the conduit line because it runs more diagonally across the 

 formations. 



Borings. The following tabulation of borings and interpre- 

 tations upon them forms the basis of the present ideas of structure 

 and quality of rock on the Lower East Side. The borings are given 

 in order from west to east, and all points are neglected except those 

 bearing upon geologic structure. 

 28 The Bowery and Delancey street 

 Surface elevation 40.5 feet 



Rock floor -71 feet. Rock is Manhattan schist, and has been 

 penetrated to —91 feet 

 78 Delancey street west of Christie 

 Surface elevation 41.4 feet 



Rock floor -101.6 feet. Rock all typical Manhattan schist — 

 at about 60° 

 224 and 301 North side of Delancey street west of Christie street 

 Surface elevation 42 feet 

 Rock floor at el. -99 feet 

 Manhattan schist to el.-330 feet 

 Inwood limestone to bottom at el. -395 feet 

 229 Northeast corner Delancey street and Christie street 

 'Surface elevation 43 feet 

 Rock floor at el. -108 feet 



Manhattan schist with very poor core recovery to el. -260 feet 

 Inwood limestone to bottom at el. -360 feet 

 84 Delancey street east of Christie 

 Surface elevation 41.8 feet 



Rock floor —135 feet. All badly decayed schistose rock, of 

 same type — no effervescence — red color — soft as cheese 

 to -204 feet 

 227 is a reoccupation of this same hole 84 



Inwood limestone was found below el. -250 feet to the bottom 

 below el. -300 feet 



