GREENPOINT (GALE) WELL AND SECTION. 103 



The above interpretation agrees very closely with the correlation of 

 the section which was made by Dr Englehardt. The Doctor gives the 

 top of the Niagara limestone as at 578 feet, which is the same as for my 

 section. The top of the Clinton, which is at 910 feet, is not stated, but 

 of course the iron-ore stratum was noticed and correctly placed in the 

 geologic series. At 1,008 feet are grayish and brownish arenaceous 

 chips, which the writer is inclined to refer to the Medina, although Dr 

 Englehardt considered a " red-brown sandstone " at 1 075 feet as the top 

 of the Medina. Finally, at 1,815 feet is the top of the Oswego sandstone, 

 in which formation is the bottom of the well.* 



Greenpoint (Gale) Well and Section. — The "Gale " well at Greenpoint, on 

 the eastern shore of Onondaga lake, about four miles north of Syracuse, 

 was drilled in 1884 to the depth of 1,G00 feet. This well section was also 

 described by Dr Englehardt,f and the specimens donated to the United 

 States National Museum. The writer has examined the set of samples, 

 and would give the section as follows : 



SECTION OF THE GALE WELL NEAR SYRACUSE, NEW YORK. 

 Depth. Thickness. Kind of rod-. Formation. 



Feet. Feet: 



65 457 Chocolate-red, green, blue and dark gray 



shales and marls Onondaga Salt group. 



522:}: 320 In the upper part blue calcareous shales 

 or shaly limestone, and below very dark 

 gray to blackish, glistening limestone; 

 some of the samples dark blue, part with 

 strong effervescence in cold HC1, and 

 the remainder with slight effervescence, 

 which is increased on heating ; the lower 

 part is largely blue shaly limestone ; 

 fragments of brachiopods and lamelli- 

 branchs at 700 feet Niagara (?) 



•S42 149 Mainly clear, green argillaceous shale ; at 

 970 feet some iron ore, more at 971 feet, 

 and sample from 970 feet largely com- 

 posed of oolitic iron ore ; at 98(5 feet 

 dark gray shales with some slightly red- 

 dish chips Clinton. 



♦ Compare Dr Englehardt's section in ibid., pp. 5-17, and especially the general account of the 

 will following the section on page 17. 



t Ibid., pp. 12-ir». 



I Dr Englehardt called the top of the Niagara limestone 527 feet, but the pre ling sample from 



522 feet varies but little in lithologie characters. PossiMy it would be better to call 536 feet the top 

 of the Niagara, where the first of the dark blue limestone occurs. 



