J. Gibson—Salt deposits of Ontario. 367 
having the character of the so-called water-lime beds. As 
shown in the record, we have for the entire thickness of the 
Onondaga formation at this particular locality 968 feet, of 
which the upper 807 are chiefly magnesian limestones, with 
occasional cherty layers, the underlying 161 feet being repre- 
sented by gypsiferous and saliferous shales, including the mass 
of rock salt at the base. The brine pumped up constantly 
marks 87° salometer, and has a specific gravity of 1°175 at the 
temperature 62° F. 
3. Hawley’s well, Goderich. 
The record of this well was essentially the same as that of 
the “Dominion,” until the salt deposit was reached at the depth 
of 967 feet, after which the drilling was carried (1) through 12 
a of ee salt and shale, and (2) through 17 feet of pure 
rock salt. 
6. The Clinton well. Feet. 
(1.) Clay, gravel, sand, and boulders,..-...--------------- 70 
(2.) Gray cherty non-magnesian limestones (Corniferous), .--- 108 
(3.) Water-lime beds (Tentaculite limestone), -...........- 24 
tone 
(4.) Hard magnesian limestones, with intercalated beds of 
2 
Cnert 53. eee 
(5.) Hard arenaceous limestones, with beds of shale and gyp- 
BMI SE oo Sole. goa ad oe as Pe was 2 oe et eee es 470 
(6.) Coarse limestones and gypsiferous shales, with a mud- 
vel: 3-mnches in: thicknetay cc! 2s ert 2 147 
(7.) Very porous limestone, containing salt, Bore at | 
t ¥ 
(8.) Rock sal se 20 
Total depth, 1136 
_ Nothing of particular interest marked the process of boring 
in the above well. The presence of the Corniferous formation 
was at once detected by the borers, constituting 108 feet of the 
surface rock. The underlying 938 feet constitute the Salina » 
formation (Onondaga), which here does not attain such a thick- 
hess as at Goderich, the upper portion probably having been 
removed by erosion prior to the deposition of the Corniferous 
s. Hydrated calcium sulphate or gypsum was met with 
about the center of the Salina formation, occurring in compact 
snow-white masses along with crystals of selenite (a lamellar 
form of the same). 
7. Stapleton well. Feet, 
eee et ee eee www eee ee 
— eee ee 
country, 
(2.) Sand, gravel, and boulder clay 67 
413 
eee 
ed 
