Gas- Well Sections m Central New York. — Prosser. 153 
In the above section 146 feet may not be the base of the Sa- 
hna shale, aUhough so reported, but at 190 is typical Niagara 
limestone. Again at the bottom of the Niagara no samples 
were saved between 246 and 480 feet, a thickness of 234 feet, 
so that the top of the Clinton may be above the 480 sample. 
The thickness of 334 feet for the Niagara limestone, however, 
agrees closely with its thickness in the wells near Syracuse. 
In the State well it was determined as 332* feet, in the Gale 
well, four miles north of Syracuse, 320 feet,t and at Clyde, 36 
miles west of Syracuse, 335 feet.t The Clinton was given as 
149 feet in thickness in the Gale well and 98 feet in the State 
well. Again it is difBcult to indicate accurately the line of di- 
vision between the Medina and the Oswego sandstones, on ac- 
count of the absence of a sufficient number of samples from 
that part of the well. The thickness of 705 feet for the Medina, 
however, agrees fairly well with that obtained in neighboring 
wells, although it may be somewhat greater in this one. In the 
Chittenango well, 15 miles east of Syracuse, the Medina is 520 
feet in thickness,§ in the State well 807 feet, and in the Wol- 
cott well, 35 miles N. W. of Syracuse, 690 feet.|] In the Wol- 
cott well the OswegO' sandstone was given as 210 feet, below 
which is 170 feet of blue shale alternating with silicious sand- 
stone similar to the Oswegc^, and below this is 650 feet of 
Hudson and Utica shale. In the Fulton well, about 12 miles 
N. N. W. of Baldwinsville, the Oswego sandstone was given 
as 185 feet thick; the Hudson as 695 feet, and the Utica shale 
as 120 feet.^ 
Mr. M. C. Pierce gave me the depths at which different 
formations were reached in some of the other wells in the vi- 
cinity of Syracuse. In the Names' well the top of the Medina 
is at 750 feet, and the Trenton limestone at 2,270 feet. A 
sample of the Trenton limestone from a depth of 2,616 feet in 
this well was shown me, which contained good specimens of 
Plectambonites sericea (Sowb.) H. and C. and crinoid seg- 
*Prosser, Bull. Geol. Soc.Amer., vol. 4,1803, p. 102. 
flbid., p. 103. 
JProsser, American Geologist, vol. \'I, iSgo, p. 204. 
§Bull. Geol. Soc. Anier., vol. 4, p. gg. 
!| American Geologist, vol. \T, \). 204. 
TJBull. Geol. Soc. Anier., vol. 4, p. 106. 
