A List of Minerals and Organic Remains. 79 
only seen in time of low water; at and near Point Henry, 
close to Kingston, U. C.; and in many places on the north 
_coast of Lake Huron. In the last named locality it 
rests directly, in several instances, on a beautiful snow- 
white transition quartz, which occupies the main shore in 
steep hills, four hundred and five hundred feet high, from 
near the French River to the River Le Serpent, (70—80 
miles.) The immediately subjacent rock, at La Cloche, 
and on the isles north of the MAniteulines in the same 
lake, is sometimes a highly inclined greenstone. Near 
Montreal, it overlies, directly, crystalline trap,. eee 
augite, zeolite, mica, feldspar, &c. 
But ordinarily, a sandstone, grey wacke, ora conslones 
rate of quartzose, or calcareous materials is interposed ; also, 
in horizontal layers. It is to be remarked, (en passant,) 
ihat much the greater part of the grey wacke of Lower Can- 
ada does not belong to this deposition; but is conformable 
to the mica-slate, gneiss, &c. ranging along the north shore 
of the St. Lawrence, between Quebec and the river Sa- 
guenay. 
Often these intervening strata derive their constituents 
from the enclosing rocks, as is finely seen in the outlet of 
Lake Ontario, on Mr. Law’s farm, three miles below Kings- 
ton, where the inclined rock is milky quartz, subordinate to 
gneiss. Here the nodules are milky quartz, very large, 
usually with blunted angles, intermixed with fragments of 
the schorl so. abundant in the gneiss, and imbedded in 
green and grey pulverulent calcareous matter, which grad- 
ually becomes compact, upwards, and free from nodules. 
It is also exemplified on the west side of the river Montmo- 
renci, especially below the bridge, near the falls, where 
the nodules are of gneiss, sometimes one or more feet in 
diameter ; the cement being calcareous and powdery. In 
Lake Huron, the same fact occurs on an extensive scale 
with the crystalline snow white quartz rock before allu- 
ded to. 
In numerous and widely prevailing examples, this stra~ 
tum receives its materials from distant sources, which are 
not to be traced, or only with a certain degree of probabil- 
ity. Frequently the cement is wanting, or is argillaceous. 
The sandstone, which is beneath the limestone from near 
Kingston, U. C. to St. Anne’s, twenty-six miles north-west 
