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| Keywords: The Quarterly journal of the Geological Society of London (12512122313).jpg 362 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY <br> varied and cliffy aspect ; partly due to the <br> escarpment side of the mica-slates and <br> partly to the frequent alternations of <br> these with intrusive masses of a close- <br> grained porphyritic granite <br> It is the relative position which these <br> two rocks occupy with reference to each <br> other and the manner in which they are <br> associated that constitutes the great pe- ˘ <br> culiarity of this district <br> We have seen that in the ridges be- <br> tween the Clyde and Loch Fyne where <br> there is a great anticlinal effected from <br> some cause or another there is no ap- <br> pearance of any intrusive rock ; and we <br> shall now find that between Loch Fyne <br> and Loch x\we where there is a perfect <br> conformity in the dip of the stratified <br> slates there the intrusive rocks are ne- <br> vertheless developed in great force <br> The summit ridge of this district see <br> fig 1 is a ridge of mica-slate It falls <br> rapidly into the basin of Loch Awe the <br> dip of the strata being steeper along the <br> line of greatest elevation which runs far <br> back from Loch Fyne and much nearer <br> to Loch Awe The intervening space <br> between this summit ridge and Loch Fyne <br> is occupied by a series of lower ridges in <br> general diminishing in height as they <br> approach the Loch The tops of these <br> ridges are granite ; but the tops only <br> Both at their back and on their front the <br> stratified rocks ascend generally to more <br> than half their height as well as occupy <br> the whole of the intervening hollows In <br> short these granite tops may be said to <br> be intei'stratijied on a gigantic scale with <br> the mica-rslates ; the latter always pre- <br> senting the same dip and the same general <br> direction At many spots the line of <br> junction is easily accessible ; and the ig- <br> neous and stratified rocks may be seen <br> surface to surface in undisturbing con- <br> tact with each other <br> The general character of this peculiar <br> association of the granite with the mica- <br> slates will be best understood by an ideal <br> section of the district fig 2 <br> Before venturing upon any suggestion <br> ' <br> 1 34983497 108767 51125 Page 362 Text v 9 http //www biodiversitylibrary org/page/34983497 1853 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 9 1853 Geology Periodicals Smithsonian Libraries bhl page 34983497 dc identifier http //biodiversitylibrary org/page/34983497 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-14 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12512122313 2015-08-27 09 53 06 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1853 Photos uploaded from Flickr by Fæ using a script | ||||
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