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496 GEOLOGICAL REMARKS 



power of explosion ; nor indeed any appearance, 

 but what would naturally be found, in a case of 

 subsidence or desiccation. Those on the upper or 

 mountain side, preserve throughout their original 

 position, which, with little exception, is almost 

 horizontal, with their edges presented to the eye ; 

 and they seem to run backwards undisturbed into 

 the body of the mountain : while, on the lower, 

 or detached side, they have precisely the appear- 

 ance and inclination which might be expected, if 

 they had fallen off or slipped down from the 

 higher mass, of which they originally formed a 

 part. In confirmation of this hypothesis, it may 

 be observed, that the precipitous front on the 

 mountain-side, approaches in general much nearer 

 to the perpendicular, than on the opposite side, 

 which shelves so considerably that I was able at 

 one place, not far from the centre, to clamber 

 from the bottom up to the top. 



IV. Whether the Cartlane greenstone has been 

 an eruption from below, or a deposition from 

 above, or in whatever way we may suppose it to 

 have been formed ; every thing in the appearance 

 and position of the rock, demonstrates, that the 

 greenstone itself also, must have originally been 

 a part of the great mountain-mass, previous to 

 the period of its being rent as we now see it. In 

 fact, the greenstone on the one side has evident^ 



