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| Keywords: The Quarterly journal of the Geological Society of London (12682975495).jpg 1856 <br> HAUGHTON GRANITES OF IRELAND <br> 199 <br> which it is in all probability a continuation as shown in the accom- <br> panying map of parts of Down and Armagh fig 2 It is composed <br> Fig 2 Map of the Ulster Granites <br> 1 Potash- Granite <br> Soda- Granite <br> Silurian Slate <br> Carboniferous <br> Limestone <br> of quartz white feldspar and green mica and resembles in its phy- <br> sical and mineralogical character the granite at the base of Slieve na <br> glogh This resemblance is not confined to its external character <br> but exists as to its chemical composition as is shown by the following <br> analysis of the average granite near Wellington Inn In the cutting <br> of the Belfast Junction Railway near this place numerous trap-dykes <br> are seen penetrating the granite and may be traced for a considerable <br> distance in the small quarries of the neighbourhood <br> Wellington Inn Granite <br> Quarts Orthoclase Green Mica <br> Specific gravity 2'61 5 <br> Per cent Atoms <br> Silica 71-24 1-549 <br> Alumina 14 361 o ' 9l <br> Peroxide of iron 3'36j ' ' ' <br> Lime 1-48 <br> Magnesia 0 64 70 <br> Potash 4-09 f-' <br> Soda 3'13j <br> Loss by ignition 1 50 <br> 99-80 <br> If we assume as in the discussion of the corresponding granite of <br> VOL XII PART I P 35338636 109655 51125 Page 199 Text v 12 http //www biodiversitylibrary org/page/35338636 1856 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 12 1856 Geology Periodicals Smithsonian Libraries bhl page 35338636 dc identifier http //biodiversitylibrary org/page/35338636 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12682975495 2015-08-27 11 52 52 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1856 Photos uploaded from Flickr by FĂŚ using a script | ||||
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