GLACIAL DRIFT ON THE MAGDALEN ISLANDS. 
9 
decayed sandstone overlain by rather well stratified gravel, in 
which the stones are mainly of the common diabase which out- 
crops not far away. Just beyond here is an unstratified or ob- 
scurely stratified deposit of hard red clay containing angular 
stones of the volcanic rock. A few of these seem to be “soled” 
and dimly striated. The glacial origin of the deposit, however, 
is by no means as clear as that at Amherst, Considered alone 
the evidence at Grindstone island would be of little value. 
ALRIGHT ISLAND. 
At Point Bosse a high dome-shaped hill like the one at Cape 
aux Meules exhibits the same structure of hard buff-weathering 
sandstone. Near the base of the hill beside the village road is a 
section exposing a mantle of 2 or 3 feet of unstratified reddish 
sand containing stones, followed, below, by 3 feet of red gravel, 
which in turn covers the deeply decayed red and grey sandstone. 
The gravel consists mainly of subangular and discoidal pebbles 
of diabase, but includes also vein quartz, grey and white quart- 
zite, feldspar porphyry, syenite, diorite, coarse granite, and labra- 
dorite. Although nearly all of the stones here have rounded 
surfaces, two or three were found which have typical subangular 
form, and one of these is delicately but clearly marked with 
fine striae which run lengthwise on the stone, appearing on the 
treads of three step-like projections but failing in the re-entrant 
angles between the steps. Here, on Alright island, as at Cape 
aux Meules, the evidence is not convincing, since the material 
might be sufficiently accounted for by sea-ice drifting against 
or across the surface of the island during a period of greater 
submergence. The heterogeneity of the deposit, however, 
requires at least a distant source for it. 
COFFIN ISLAND. 
The landing for the boat at Grand Entry is at the extreme 
southwest comer of Coffin island on a low sand spit. About 
half a mile from the pier along the cart road the low sea cliff 
exposes a section of cross-bedded red sandstones covered by a 
