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| Keywords: The Quarterly journal of the Geological Society of London (12895160303).jpg 1864 <br> YOUNG GLACIERS <br> 45 <br> thick Boulder-clay About a quarter of a mile below the house the <br> detritus again crosses the stream and throughout the rest of its <br> course until it joins Megget covers both banks shrinking very much <br> however at the base of Dead- for-Cauld whose coomb-like crags <br> form a recess in which lies a thick mass of Boulder-clay Here the <br> moraine-matter contains an unusual number of scratched stones <br> derived doubtless from the older glacier deposit Craigdilly the <br> hill on the east side of this the lowest portion of Winterhope presents <br> towards the burn a bare rocky slope along whose base the detritus <br> is limited by a very distinct line and by a series of moutonnee <br> surfaces indicating the passage of ice at a higher level than that of <br> the detritus whose interlacing mounds enclosing small pools or <br> peat-pots are disposed without any order <br> Between Firthy Brig Head and Loch Craig the rock-terrace for- <br> merly mentioned passes northwards and dips first gently afterwards <br> rapidly into Upper Talla Valley The irregular surface of the ter- <br> race the col and the slope to the valley are covered with loose grit- <br> fragments and sandy debris ; the glaciated aspect of projecting rocks <br> is marked but the crumbling nature of the coarse pebbly grits is <br> unfavourable for the preservation of striations They are seen only <br> in one place namely on the west slope a little north of the March- <br> dyke on a smooth surface among the loose blocks which strew the <br> hill-side The striae run down the valley at a low angle but their <br> position about 50 feet above the watershed renders it possible that <br> they may belong to the earlier glaciation <br> Fig 3 ” Sketch of Moraines in Upper Talla Valley seen from <br> the North <br> The more rapid slope terminates in a marsh beneath which the <br> detritus is spread evenly The marsh lies in an expansion oblique <br> to the valley in fact in the N E strike of the rocks since it is hollowed <br> out of a mass of softer shales on either side of which are massive <br> grits namely abovo at the slope and below at Talla Craig which pro- <br> By Archibald Geikie Esq F G- S 36089726 111261 51125 Page 457 Text v 20 http //www biodiversitylibrary org/page/36089726 1864 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 20 1864 Geology Periodicals Smithsonian Libraries bhl page 36089726 dc identifier http //biodiversitylibrary org/page/36089726 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-03 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12895160303 2015-08-26 16 54 57 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1864 Photos uploaded from Flickr by Fæ using a script | ||||
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