Edinburgh New Philosophical Journal . edinburghnewphil09edin Year: 1830 - 1830 from Castktun to 3Iar Lodge, 4t. 279 In the gneiss, observed, cotemporaneous masses of gneiss as represented in the figure at a a a, which might be mistaken for fragments. From Custleton to Mar Lodge—Fall of the Dee—Across the Mountains to Aviemore.—The country from Castleton to Mar Lodge abounds in stratified quartz-rock, which is often micaceous, thus passing into mica-slate, always with imbedded grains and crystals of felspar, and passes into gneiss. These strata, as is the case in the Lion's-Head, Glen Calla
Edinburgh New Philosophical Journal . edinburghnewphil09edin Year: 1830 - 1830 from Castktun to 3Iar Lodge, 4t. 279 In the gneiss, observed, cotemporaneous masses of gneiss as represented in the figure at a a a, which might be mistaken for fragments. From Custleton to Mar Lodge—Fall of the Dee—Across the Mountains to Aviemore.—The country from Castleton to Mar Lodge abounds in stratified quartz-rock, which is often micaceous, thus passing into mica-slate, always with imbedded grains and crystals of felspar, and passes into gneiss. These strata, as is the case in the Lion's-Head, Glen Calladcr, and Clunie Water, range from NE. to SW. and dip under vari- ous angles, 45° and upwardsj to the SE., and are traversed by veins of granite and of felspar-porphyry. We visited from this the cascade called the Linn, or fall of the Dee where the river flows through a deep and narrow chasm in mica-slate rocks, over which an alpine wooden bridge is thrown at a height of SO feet above the stream. From this point up the course of the Dee to its head, there is a path which leads to the rugged tract that strikes across the Cairngorm group to Rothiemurchus. The same slaty quartz-rock, mica-slate and gneiss, with alternating and intersecting felspar porphyries and granite, prevail here as lower down the river. The path across the mountain is wild in the extreme, and difficult to travel, being encumbered, or rather blocked up, by enormous masses of gra- nite, which have fallen from the neighbouring granite cliffs. On descending from the summit-level towards Rothiemurchus, through remnants of the great central forest of Scotland, we at length leave the granite, which is replaced by gneiss strata, that accompany us onwards to Aviemore. Ben-nabuird, or Table-mountain.—On visiting this wild massive granite mountain, we walked in the direction of Mar
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