i ae oe 
T. 8S. Hunt on the Geology of Southwestern Ontario. 355 
Art. XXXV.—Notes on the Geology of Southwestern Onta- 
op by T, Sterry Hunt, F.R.S., of the Geological Survey 
(Read before the meeting of the American Association for the Advancement of 
Science, at Chieago, August, 1868.) 
Tue paleozoic strata of the southwestern portion of the 
province of Ontario (late Upper Canada), are generally covered 
i. considerable thickness eles which has made their study 
extremely difficult. During the last few years, however, nu- 
merous borings have been made over a wide area in this region, 
‘mM search of petroleum, and have disclosed many facts of geo- 
a A interest. By hag visiting the localities, and care- 
a bled preserving the records of these borings, I have been ena- 
a to — — some important sonal as ye a 
_ Bess and the distribution of the underlyi P ilurian 
Devonian strata, to which I now beg be pall the attention of 
the Association. 
E third group, embracing the Portage and the Chemung shales 
_ 4nd sandstones, with the local Catskill sandstone, makes the 
| nian.* 
Hyper Devonian. 
he black Genesee slate, according to Mr. Hall, is paleon- 
ceeeally related to the Hamilton slates, and by him included 
oo. r. Hall as belo ig 0 eee 
_ Si group, is, according to him, only twenty-four 
_ fastern end of Lake Erie. 
“James Hall, in Foster & Whitney's Geology of Lake Superior, ii, 386. 
