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| Keywords: The Quarterly journal of the Geological Society of London (12736031725).jpg THE CORALLIAN ROCKS OP ENGLAND <br> 369 <br> kinds and also immense quantities of shells and shell-fragments the <br> whole forming a sparkling white limestone with a splintery fracture <br> almost wholly devoid of oolite This sort of rock often contains as we <br> Fig 19 ” Coralline Oolite faulted against Coral Rag ” Hovingham <br> Lime- quarry <br> s <br> Coral Rag / j <br> Coralline Oolite <br> a Broken fissile Rag 4-5 ft <br> b Hard coral limestones in massive undulating beds with rounded termina- <br> tions 14-15 ft <br> c Coral shell-bed ; not constant as such The lower portion which has the <br> most shells contains Rhabdophyllia ; the upper Thecosmilia enormous spines of <br> Cidaris florigemma Exogyranana Astartc Glypticus hieroglyphicus and broken <br> shells 2-3 ft <br> d Softish oolites which on the downthrow side are seen in their true posi- <br> tion beneath the Rag ; portions of these are seen on the upthrow pide in a <br> shivery and ruinous condition <br> have already seen at Helmsley much flint Commencing with the <br> western extremity of our district not far from Hovingham we have <br> some fine exposures of the reef-like variety such as is represented in <br> fig 19 in quarries on Cawton Heights and in the village ud ow In <br> these places where there is so much actual coral without the layers of <br> intercoralline mud the fossils are not particularly numerous or easy <br> to extract ; but we may note of course Pecten vimineus Exogyra nana <br> Lima pectiniformis immense spines of Cidaris Jlorigemma a stray <br> Hemicidaris or Pseudodiadema hemisphcericum and in the intercoral- <br> line portion Terebratula insignis There is however on Cawton <br> Heights one most fossiliferous exposure which from the mixed cha- <br> racter of the fossils has long provoked discussion as to its true posi- <br> tion This occurs at a place near the top of the plateau called Sike <br> Gate fig 20 There is so much apparent faulting about here that it <br> is dangerous to rely upon the evidence of adjacent quarries; but in a <br> quarry 800 yards to the eastward the surface of which is about the <br> same elevation are displayed about 25 feet of thick-bedded oolites <br> soft rock with one or two shaly partings towards the bottom <br> Q J G S No 130 2 b 35818498 110705 51125 Page 369 Text 33 http //www biodiversitylibrary org/page/35818498 1877 Geological Society of London NameFound Cidaris NameConfirmed Cidaris EOLID 16738 NameBankID 236951 NameFound Exogyra nana NameConfirmed Exogyra nana NameFound Glypticus hieroglyphicus NameConfirmed Glypticus hieroglyphicus NameBankID 6076260 NameFound Hemicidaris NameConfirmed Hemicidaris EOLID 13205158 NameBankID 4190639 NameFound Lima pectiniformis NameFound Pecten vimineus NameFound Pseudodiadema NameConfirmed Pseudodiadema EOLID 4711764 NameBankID 4318037 NameFound Rhabdophyllia NameConfirmed Rhabdophyllia NameBankID 4328435 NameFound Terebratula insignis NameConfirmed Terebratula insignis NameFound Thecosmilia NameConfirmed Thecosmilia NameBankID 4368193 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 33 1877 Geology Periodicals Smithsonian Libraries bhl page 35818498 dc identifier http //biodiversitylibrary org/page/35818498 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-24 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12736031725 2015-08-26 20 04 40 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1877 Photos uploaded from Flickr by Fæ using a script | ||||
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