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| Keywords: The Quarterly journal of the Geological Society of London (13860395994).jpg PROF C LAPWORTH ON THE GIRVAN SUCCESSION <br> 585 <br> S E <br> Fig 14 Typical Section near Balclatchie Bridge <br> N W <br> Ba Ardwell Graptolitic Shales and Flags <br> a 1 Dark carbonaceous and iron-stained shales with Graptolites <br> n Basal zone of calcareous and carbonaceous shales with Climacograptus <br> Scharenbergi Lasiograptus HarJcnessi and Cryptograptits tricornis <br> Ad 2 Balclatchie Grits and Conglomerate <br> d 2 ' Ashy gritstones and flaggy beds fossiliferous <br> d 2 Calcareous boulder conglomerate with Lingula canadensis <br> d 2 ' Green flaggy gritstones calcareous fossiliferous <br> Ad 1 Balclatchie Shales <br> Grey and green calcareous and nodular mi idstones highly fossiliferous <br> with Barrandia Remopleurides laterispinifer Ampyx Hornei Asapkus <br> gigas Siphonotreta micula Bicranograptus tardwscidus c <br> Ac Benan Conglomerate <br> Coarse conglomerate and interbedded sandstones with boulders of quartz <br> and felsite <br> Basaltic dykes <br> teristic features Boulders of quartz granite and felstone often of <br> large size are confusedly huddled together in a greenish matrix <br> composod of a sandy or more or less ashy material which weathers <br> on the surface to a dull orange tint Its highest beds are well ex- <br> posed in some small cliffs that overhang the roadway to the north <br> of the bridge where they exhibit distinct evidence of their bedded <br> nature in the visible arrangement of the rounded balls of white <br> quartz and grey porphyrite in regularly parallel lines and in the <br> distinct alternation of coarse conglomeratic bands with others of a <br> sandier texture These all dip steadily to the northward at an <br> angle of from 50 to 60 degrees and distinctly follow each other in <br> unbroken sequence <br> The highest beds of the conglomerate proper can be studied foot <br> by foot in these cliffs Towards their termination they become <br> somewhat looser in texture and the matrix of the rock grows more <br> sandy At their summit where they are pierced by three small <br> basaltic dykes of a most interesting character they pass up con- <br> formably into an overlying group the Balclatchie Beds Ad of <br> calcareous shales and mudstones and flaggy grits highly fossiliferous <br> The unbroken continuity of the sequence at this locality is easily <br> demonstrated The pebble-beds characteristic of the Benan Con- <br> glomerate below and the shaly beds characteristic of the Balclatchie <br> zone above distinctly alternate with each other in a curious group <br> Q J G S No 152 2r 36936414 113692 51125 Page 585 Text 38 http //www biodiversitylibrary org/page/36936414 1882 Geological Society of London NameFound Ampyx NameConfirmed Ampyx EOLID 4320587 NameBankID 2875646 NameFound Barrandia NameConfirmed Barrandia EOLID 4325024 NameBankID 2875743 NameFound Climacograptus NameConfirmed Climacograptus EOLID 4724508 NameBankID 6568305 NameFound Graptolites NameConfirmed Graptolites NameBankID 423327 NameFound Lasiograptus NameConfirmed Lasiograptus NameBankID 4214571 NameFound Lingula canadensis NameFound Remopleurides NameConfirmed Remopleurides EOLID 4320706 NameBankID 2875677 NameFound Siphonotreta micula NameConfirmed Siphonotreta micula McCoy Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 38 1882 Geology Periodicals Smithsonian Libraries bhl page 36936414 dc identifier http //biodiversitylibrary org/page/36936414 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 N02/13860395994 2015-08-26 07 57 55 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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