is Captain Bayfield on the 
Ou the northwest side of Point Keewawonan the high cen- 
tral part of which we have no doubt is granite, the sandstone is 
inclined at various angles dipping to the north and northwest. 
Its inclination was always greatest, when the granite hills 
were nearest to the coast, amounting in some cases to 70 de. 
grees. On approaching the Porcupine or Wisconsan Moun- 
tains,* the same phenomena occurred, and in that part of 
the coast where those hills are only distant about a mile from 
the lake the dip to the northward was 70 degrees. 
At Montreal River, and at other places on the south coast, 
the sandstone was also highly inclined, but apparently from 
subsidence or displacement. Having now mentioned instan- 
ces in which it appears that the granite has hove up the 
sandstone after it was deposited, as well as those of a con- 
trary nature, we shall leave it tothose who have more leisure 
and more ability to draw the proper deductions therefrom. 
Our business, to the best of our ability, is the faithful relation 
of facts. 
The sandstone sometimes appears in undulatihg strata, as 
in the following sketch representing the entrance of Horse 
Shoe Cove, in an island in the mouth of Black Bay on the 
north coast.t 
Upon examination of the junction of the granite and sand- 
stone in several places on the south coast, we perceived a 
mutual decomposition for 5 or 6 inches, and the sandstone, 
for the first foot above the granite was full of scales of its 
white mica. 
There appears to be little doubt that this formation is of 
immense extent to the west and southwest. It probably re- 
aches to the foot of the Rocky Mountains.§ It is also not 
improbable, that itis the formation upon which the limes 
stones of lake Huron rest:—For sandstone appears at the 
Neepish Rapids, and in the bed of the river Minestan,t 
PLM 7 Sod ee eo eer SS 
*Wisconsan, in the Chippewa language signifies a Porcupine. 
tSee Fig. 5. 
(See Major Long’s expedition and other American Writers. 
tHere it supports diluvial calcareous sand clay containing 
shells similar to those of the Jakes, with occasional boulders of 
granite, &es on 
~ no ae Te oe 
