262 Scientific Intelligence. 
ficial deposit of recent tertiary marls. None of the older un- 
changed rocks are seen on this side, but the modern sands and 
sandstones are exposed in a horizontal position in the channel of 
the river. ; 
The hot springs are located on the right bank of Grand River, 
at the juncture of the sedimentary rocks with the granites, Just 
east of the springs is a high hill, Mount Bross, one thousand to 
one thousand two hundred feet above Grand River, which seems 
low and gray sandstones, and laminated arenaceous sha y cla 
The whole is so grassed over, that it is difficult to take a section. 
m the cretaceous to the jurassic. The bank is not more than er 
feet thick above the water, and yet it shows that the river itse 
rolls over the upturned edges of all these beds. 
1. Tertiary strata, forming the greater part of the hill known 
as Mount Bross. The Cretaceous, consisting of— 
Gray laminated sandstones, passing down into arenaceous 
i S, &e. 
3. Black clays of No. 4. These are of great thickness, and ev- 
i k of the river, it 18 
the attention of scientific men, who may hereafter visit this feat 
esting locality, which will soon become celeb to a section 0 
the roc ugh which the waters of th ng must pass 12 
in-li 7 
rfiows. They are properly “Hot Sulphur Springs,” 
mperature from 80 to 112° 
