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Mr. Weaver on the 
but of short continuance, terminating abruptly at the south-west, 
and edging out on the north-east, being thus completely inclosed 
by the mica slate, the laminae of which follow the line of the bed 
of granite, which is about fifteen feet in length ; (see Plate IS. 
%. i.) 
We now come to a third bed of granite, but of less dimensions, 
or rather to a vein, terminating also abruptly in the mica slate, and 
upon its sides we perceive portions of the latter rock impressing 
and indenting the former in a very singular manner. Here are 
also layers and veins of quartz a few inches thick, either pure, or 
mixed with felspar, terminating likewise abruptly in the mica slate; 
(see Plate 13. fig. 2.) 
From a curve in the direction of the ravine, the first mentioned 
bed of granite re-appears, and it may be followed a considerable 
way upward in the ravine, (the direction of the two now corres- 
ponding), sometimes contracting, sometimes enlarging in its dimen- 
sions, yet seldom attaining one foot in width. 
Higher up, is a short compressed elliptical mass of granite, in- 
closed between the laminae of the mica slate. It is only a few 
inches in length. And beyond this, is the horizontal section of 
what appears to be a granite vein nearly enveloping a portion of 
mica slate, its course being concealed by soil toward the south- 
west. The parallelism of the laminae of the mica slate does not 
appear to be affected by this disposition of the granite ; (see 
Plate 13. fig. 3.) 
Still ascending, we find the rock ranging as before 25° north of 
east and south of west, and dipping to the north-west, being 
occasionally much disposed toward the undularly curved slaty 
structure. We now come to another small bed or vein of granite ; 
(see Plate 13. fig. 4) and tracing it to the north-east, we find it 
