. The Edinburgh new philosophical journal. Science. from Castlcton to Mar Lodgiy ^-c. 2T9 In the gneiss, observed, cotcmporancous masses of gneiss as represented in the figure at a a a, wliich might be mistaken for From Castleton to Mar Lodge—Fall of the Dee—Across the Mountains to Aviemorc.—Tlie country from Castleton to Mar Lodge abounds in stratified quartz-rock, whicli 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 LionVHead, Glen Callader, and Clunie Water, rang
. The Edinburgh new philosophical journal. Science. from Castlcton to Mar Lodgiy ^-c. 2T9 In the gneiss, observed, cotcmporancous masses of gneiss as represented in the figure at a a a, wliich might be mistaken for From Castleton to Mar Lodge—Fall of the Dee—Across the Mountains to Aviemorc.—Tlie country from Castleton to Mar Lodge abounds in stratified quartz-rock, whicli 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 LionVHead, Glen Callader, and Clunie Water, range from NE. to SW. and dip under vari- ous angles, 45^ and upwards, to the SE., and are traversed by veins of granite and of felspar-porphyry. AVe 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 30 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 tcv 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 difl^cult 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-na-buirdy or Table-mountain.—On visiting this wild massive granite mountain, we walked in the direction of Mar. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of th
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