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| Keywords: The Quarterly journal of the Geological Society of London (13204794655).jpg 404 C CALLAWAY ON THE NEWER GNEISSIC <br> to the same bed of quartzite but overlaps the edges of several beds <br> within a few yards We are not however left to such minute <br> points of criticism Here again our knowledge of the Assynt <br> succession solves the difficulty The beds of quartzite in contact <br> with the gneiss are of the Seamy type ; and lower down the slope the <br> upper Annelidiau division comes in Further west at the corner <br> where the cliff curves abruptly round to the south the Erown Flags <br> appear below the Annelidian ; and below the flags at the base of <br> the escarpment the Annelidian comes in again This structure is <br> similar to the inverted syncline on Camas-an-Duin the Salter etta- <br> grit and Dolomite being absent from the centre of the fold as in <br> Cr aig-n a-f aolin <br> The same relations are continued for some distance along the <br> strike- section fig 10 The ground now rising towards the south <br> Fig 10 ” Strike- Section of the western escarpment of Ben Arnaboll <br> Scale 8 inches to 1 mile <br> N S <br> the Quartzite under the flags is soon hidden and the flags occupy the <br> base of the cliff Then suddenly the Quartzite about 200 ft thick <br> above the Flags disappears and the latter form the whole of the <br> scarp below the gneiss the Quartzite and Flags being separated by <br> a vertical fault except at the top where the Flags send a narrow <br> wedge to the north between the Quartzite and the gneiss Further <br> south the place of the Flags is taken by confused masses of quartzite <br> and flags ; but just above the little loch the succession is clear <br> The cliff at this spot from its foot to the base of the gneiss is <br> 200 feet high It displays an exact repetition of the Assynt series <br> from the bottom of the Flags to the lower part of the Dolomite <br> Quartzite lies at the foot of the scarp Ascending over the Flags <br> in which we can make out three horizons at 60 feet we reach the <br> S alter ella-grit and Quartzite and at 90 feet we come to the base of <br> 10 ft of dolomite At 100 feet the Flags rest on the Dolomite the <br> lower rock dipping E S E at 40° and the Flags at 30° the beds of <br> dolomite being curved outwards as if by the pressure of the over- <br> lying flags The second 100 feet is the lower succession repeated <br> even to the 10 feet of dolomite It will be observed that in this <br> section the rocks are not inverted <br> The faulting here is not normal ; for the repeated series rests on <br> the lower one in a steep cliff but is clearly reversed The westerly <br> push of the repeated beds tends to confirm my explanation of the 36929011 113681 51125 Page 404 Text 39 http //www biodiversitylibrary org/page/36929011 1883 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 39 1883 Geology Periodicals Smithsonian Libraries bhl page 36929011 dc identifier http //biodiversitylibrary org/page/36929011 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-16 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13204794655 2015-08-26 12 51 16 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1883 Photos uploaded from Flickr by Fæ using a script | ||||
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