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| Keywords: The Quarterly journal of the Geological Society of London (13071415784).jpg MOOEE ABNORMAL SECONDAEY DEPOSITS <br> 499 <br> sy <br> <br> v\A'\\\w <br> I'Vll l <br> km <br> The Lias in this curious section is most regularly bedclecl and is <br> seen by reference to the diagram to occupy the centre of a small <br> trough into which its beds are <br> compressed with the Ehaetic White <br> Lias asregularly underlying it The <br> Avicula-contorta series below was <br> largely opened ; and I have never <br> had the pleasure of seeing any <br> other section to be compared Avith <br> it The Keuper Marls and rocks <br> of the New Red Sandstone were <br> met with at the southern end of <br> the cutting ; and all were abruptly <br> cut oiF at a short distance to the <br> north by the Pennant rocks of the <br> Coal-measures through which the <br> railway is afterwards continuous <br> to Mangotsfield <br> Although the present conforma- <br> tion of these beds is due to sub- <br> sequent disturbance the peculiar <br> thickening of the Avicula-contorta <br> series below the White Lias to the <br> south would lead me to suppose <br> that theymust have been deposited <br> on an uneven sea-bottom <br> At the base of the Lias in this <br> cutting there are thin representa- <br> tives of the Osfrea-liassica beds <br> but without any trace of the In- <br> sect and Crustacean beds as in the <br> section at Camel p 462 The <br> White Lias which follows is re- <br> duced to a few beds of less than <br> four feet in thickness <br> The surface of the laminated <br> clay 2 h is often entirely covered <br> by Cytliere Uassica the specimens <br> being generally so uniformly ar- <br> ranged lengthwise as to show the <br> direction of the current of the <br> water by which they were last <br> washed <br> Large coprolites in the bed 2/ <br> led me to look carefully for rep- <br> tilian remains; and although it <br> was not so rich as was expected <br> I obtained from it scattered ver- <br> tebroB and a large humerus of FJc- <br> siosaurus rugosus ; and this bed is noteworthy also from my being <br> 2m2 <br> I'm <br> 'Ml <br> p 36345254 112028 51125 Page 499 Text v 23 http //www biodiversitylibrary org/page/36345254 1867 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 23 1867 Geology Periodicals Smithsonian Libraries bhl page 36345254 dc identifier http //biodiversitylibrary org/page/36345254 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-10 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13071415784 2015-08-26 13 53 06 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1867 Photos uploaded from Flickr by FĂŚ using a script | ||||
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