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| Keywords: The Quarterly journal of the Geological Society of London (13205724275).jpg 138 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY DeC 16 <br> of contemporaneous porphyry and recomposed trappean shales ; and <br> without noticing minute puckerings and undulations they exhibit a <br> Section II <br> Llanberis <br> Stratification of Mr Assheton Smith's Quarries <br> Old quarry <br> a Sandstone <br> a' Coarse slate <br> b Upper blue slate <br> c Hard ferruginous bed <br> Level of Llanberis lake <br> d Red slate <br> e White bands <br> / Lower blue slates <br> g New quarry <br> great synclinal and afterwards an anticlinal line which cuts through <br> the Penrhyn and Llanberis quarries and afterwards at their eastern <br> and upper surface plunge unequivocally under a vast thickness of <br> beds composed of coarse greywacke slate felspar rock trappean <br> shales talc slate with asbestus greenstone c c ; the whole mass <br> being most distinctly stratified and inclined to E S E at a great angle <br> on the average not less than 50° I hope in a future communication to <br> describe this great ascending section in more detail as affording a <br> striking instance of the alternation of aqueous and igneous deposits <br> and of deposits having a character intermediate between the two <br> Counting from the zone of the Penrhyn slates we have a regular <br> ascending section for more than two miles measured on a horizontal <br> line transverse to the strike of very highly inclined beds We then <br> meet with a great synclinal trough which I have traced from Car- <br> nedd Llewelyn Glyder Fawr Snowdon and Moel Hebog a distance <br> along the crest of the chain of about fifteen miles Bands of fossils <br> Fossils from Llyn Ogwen <br> Orthis like calligramma <br> vespertilio <br> cambriensis <br> Murchisonia scalaris angulata former lists <br> Favosites fibrosa Encrinite stems <br> Orthis flabellulum <br> Snowdon <br> Actonise <br> expansa <br> elegantula <br> Encrinites <br> Turbinolopsis bina <br> Orthis expansa I <br> Actonige I ht i tt i <br> -flabellulum f ' b g- <br> elegantula J <br> ina J 36932867 113687 51125 Page 138 Text v 3 http //www biodiversitylibrary org/page/36932867 1847 Geological Society of London NameFound Encrinites NameConfirmed Encrinites NameBankID 4155830 NameFound Favosites fibrosa NameConfirmed Favosites fibrosa NameFound Murchisonia scalaris NameFound Orthis NameConfirmed Orthis EOLID 4333134 NameBankID 4270859 NameFound Orthis expansa NameConfirmed Orthis expansa NameFound Orthis flabellulum NameConfirmed Orthis flabellulum NameFound Turbinolopsis bina Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 3 1847 Geology Periodicals Smithsonian Libraries bhl page 36932867 dc identifier http //biodiversitylibrary org/page/36932867 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-17 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13205724275 2015-08-26 12 52 22 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1847 Photos uploaded from Flickr by FÌ using a script | ||||
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