266 Geology and Mineralogy of the 
ter, is a curious fact, and appears to lead to the conclusion 
that the great solvent medium (according to Theories) may 
have been, at the same moment, charged with several forms 
of mineral substances in fields or districts; and without any 
evident barrier ta prevent their commixture—a supposition 
which involves a perfect state of repose or a steady motion 
as in rivers, equality of specific gravity and of fluidity, &c. ; 
of none of which conditions are we assured. _ : 
in e Huron the brecciated and vesicular species of 
Michilimackinac, the quartzose of the Grand Manitou and 
Drummond, and the odorous variety of the Lesser Manitou 
are on the same level. 
The soft and brown kind of St. Joseph and the light col- 
oured schistose and non-organic* of the Lesser Manitou are 
both on the level of the Lake also. 
sake Ontario presents similar appearances; extending 
to sandstone. At Sackets Harbour thirty-five miles from 
Kingston the limestone is of a very deep blue, and com- 
monly largely studded with very convex bivalyes. At the 
latter place on the same plane,-the limestone is brown 
and blue, without a shell (as far as I saw) and abounding in 
tremolite. At Gauanoque at the’ head of the one thousand 
islands, on the same level with the limestone of Kingston is 
a white quartzy sandstone which continues to line the de- 
scent of the St. Lawrence to Montreal, covered by lime- 
stone. Further, if it be allowed (and I believe it must be) 
that during the first three miles from Lake Ontario, the Gen- 
essee River does not ascend eighteen feet, we shall then 
have the first fletz sandstone of that locality, the blue and 
their being the vehicles of new facts respecting the Geology 
of unexamined countries, (es 
_ To return, the rocks of the Western part of the Manitou- 
line Islands are so deranged, and so concealed by debris 
and vegetation that it requires Opportunities superior to 
mine to ascertain correctly the “mature of the successive 
i i tay : 
str a from the level of the. to the summit of the Grand 
