Ee a 
_ Which occur among the sandstones, at a distance from the trap. $ 
_ ‘These are of very limited extent, and are not at all comparable _ 
of the Lak, 
Systems of the Canada Geological Survey. 309 
action of sudden and violent forces, rather than of slow and 
long-continued ones. 
The conglomerate appears to thin out rapidly as we recede 
from the igneous rocks, forming wedge-shape masses which grad- 
ually pass into sandstone, This fact has been actually observed 
_ mM some instances, although, usually, the natural sections are not 
_ sufficiently favorable to allow the exact relation of the sediment- 
ary. to the igneous rocks to be made out. There are also patches 
of pebbly materials, formed exclusively by the agency of water, 
with the great conglomerate masses associated with the igneous 
. ‘They are evidently the result of local currents and the 
material of which they are composed is the same as that of the 
sandstone itself. eh: 
The dip of the series of bedded trap, conglomerate and sand-— 
stone is usually very regular, and varies from 40° to 50° along 
the culminating portion of the range, where it is highest. In 
only one locality, so far as observed, does it exceed 50°, and that 
the native 
