J. Gibson—Salt deposits of Ontario. 365 
I. The Ainleyville well. Feet. 
ny Sand, gravel, with boulders of gneiss and granite, ____-- 16 
(2.) Gray an blue limestones ; the uppermost 100 feet prob- 
of Ditter Spal, <2 52k eee 
5.) Gray magnesian limestone, ............-------------- 97 
6.) Magnesian limestone containing traces of brine, --- -- -- 168 
7.) Dark-brown porous sandstones, _........--. ---------- 64 
Total depth, 1244 
At this depth, the well was abandoned. Saline waters were 
met with at the depth of 1,012 feet, and were probably derived 
from the saliferous stratum lying further south. The position 
of the boring seems to mark the northeastern margin of this 
ancient salt lake, since the geological horizon of the salt was 
assed without the least evidence of its occurrence. The 9 
eet of gray magnesian limestone seemingly belong to the base 
of the Onondaga formation, below which no brines of any econ- 
omical value have yet been found. At the depth of about 
1,200 feet a small watercourse was met with, in which were 
observed traces of petroleum and bubbles of vicious gas. The 
brine extracted from this well was obtaine only at intervals 
for fifteen feet, having been first observed at the depth of 1,006 
feet from the surface. Specimens at no time marked over 30° 
Salometer; they gave a specific gravity of 1-054, and conse- 
quently contained only 7:71 per cent of pure salt.* 
2. Kincardine well. Feet 
(1.) Passed through the Corniferous limestone, the Tentaculite 
limestone, to the base of the Salina formatiofi (the records 
i 883 
Tete a ae (eae 
2) Pure vock eslt 0 ee 
i Magwesinn limeastout, 5.4... ce a a 30 
S) Pare rick mit 17 
Total depth, 957 
Here the occurrence of a second layer of salt, separated from 
the first by 30 feet of limestone, leads to important considera- 
tions regarding the probability of its extension at all parts under 
the first, Indeed, to restrict the presence of this second deposit 
very narrow limits within a salt-area comparatively wide, 
would be not only to controvert the laws regulating the distri- 
* For a table giving strength of brines from zero to saturation, see Prof. 
Alexander Winchell’s oes on the Geology of Michigan, 1861. 
