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| Keywords: The Quarterly journal of the Geological Society of London (13860441394).jpg 638 PJK0E C LAPWORTH ON THE GIRVAtf SUCCESSION- <br> 1 Shalloch Forge At the back of the blacksmith's shop of <br> Shalloch where the Braehill fault comes upon the sea-shore we find <br> excellent exposures of the strata of this conspicuous protecting <br> series The general succession there apparent is given in the following <br> section fig 26 <br> Fig 26 Section of the Rods of Shulloch Forge <br> B Arc mil Ian Series <br> Be Barren flagstones <br> C Newlands Series <br> Cba Woodland beds <br> Cba 1 Coarse green boulder-conglomerate of Craigskelly <br> Cba~ Coralline limestone with Pentamems oblongus c <br> Oba 8 Striped shales with -Diplograptus onodestus Monograptus <br> leptofheca c <br> Cc Saugh-Hill beds <br> Cc 1 Quartz conglomerate of Shalloch Forge <br> ff Faults <br> The beds which have the appearance of being lowest in the succes- <br> sion are certain green flagstones and shales Be lithologically similar <br> to those of the Barren Flagstones of the Ardmillan group and the <br> green flagstones occasionally found in the Graptolitiferous zones of <br> the Saugh-Hill beds They are only seen at low water imme- <br> diately to the south of the rugged boss of the Horse Rock which at <br> high tide forms the most northerly of the protecting fringe of islands <br> already referred to Of these green flagstones only about 30 feet <br> are seen and they dip at an angle of about 45 degrees to the north- <br> ward and are succeeded with a slight unconformity by the remark- <br> able mass of boulder conglomerate of which the Horse Rock itself <br> is made up This conglomerate is from 50 to 60 feet in total thick- <br> ness and contains many interbedded seams of gritstones which show <br> that the general inclination of the rock is almost identical with that <br> of the flagstones below The main mass of the conglomerate is <br> made up of well-rounded boulders varying from one inch to a foot <br> and a half in diameter They consist of pieces of granite porphyry <br> fclstone greywacke shale Lydian stone quartz and jasper imbedded <br> in a coarse sandy matrix of a dark green colour and excessively <br> indurated In its general aspect the rock reminds us of the Benan <br> Conglomerate and also in the special association of its enclosed <br> boulders but it is altogether harder and much more firmly com- <br> pacted than is generally the case with that deposit <br> Above this Horse-Rock conglomerate there is a break in the 36936467 113692 51125 Page 638 Text 38 http //www biodiversitylibrary org/page/36936467 1882 Geological Society of London NameFound Diplograptus NameConfirmed Diplograptus EOLID 4724632 NameBankID 4145310 NameFound Monograptus NameConfirmed Monograptus EOLID 4724831 NameBankID 4247149 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 38 1882 Geology Periodicals Smithsonian Libraries bhl page 36936467 dc identifier http //biodiversitylibrary org/page/36936467 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-15 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13860441394 2015-08-26 07 57 10 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1882 Photos uploaded from Flickr by FĂŚ using a script | ||||
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