62 A List of Minerals and Organic Remains. 
long,) is divided by a ravine into two unequal parts, on the 
south-western of which, and on the face of a shelving 
mound of bleached, close-grained granite, is situated the 
bed of schorl. Itis twelve paces in diameter, and is near- 
ly circular. It does not consist of schor] only, but is a con- 
fused aggregate of white translucent quartz, of opaque, 
cream ¢olored feldspar, of greenish yellow mica, and the 
schorl, intermixed in shapeless masses of from one to three 
feet in diameter. The quartz and feldspar are in their 
usual forms. The mica is brass yellow, with a delicate 
tinge of green. It is in flakes an inch square, grouped con- 
fusedly, and so tough that, although it is in masses a yard 
in diameter, small fragments are procured only with diffi- 
eulty. The schorl occurs as a very close lateral accretion 
of large crystals, with broken terminations, cemented by a 
film of mica, and dipping into the rock southerly, at an an- 
gle of 70°, They have here no determinate number of 
sides; but resemble a fascis, composed of unequal rods. 
From this, the principal deposit, several ramifications 
pass off to the sides of the island, wanting only the mica. 
Schorl is met with in other parts of the island, in six sided 
prisms, of four and eight inches in length, imbedded in 
veins of quartz and feldspar, coarsely mixed. The con- 
taining rock is gneiss, fine grained, of a south-west direc- 
tion, and south-east dip; but often passing into granite. 
Epidote.—In the trap of Montreal ; in druses of acicular 
maycan,) the outlet of Lake Lacroix, a large body of water 
north-west of the Grand Portage on Lake Superior, and 
