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| Keywords: The Quarterly journal of the Geological Society of London (12511800315).jpg 1853 <br> BIGSBY GEOLOGY OF aUEBEC <br> 89 <br> argillaceous and quartzose loses nearly all its fossils and assumes <br> a soft shaly structure with a high dip to the S E the same which <br> prevails for more than 100 miles in every direction but due north <br> Looking up from below at the higher parts of this bowl-shaped <br> chasm on the east side we see peeping from beneath rubbish and <br> among shrubbery displaced slabs of compact Trenton limestone fol- <br> lowed downwards by dark shales while the lower parts of the preci- <br> pice and the beach of the River St Lawrence are wholly occupied by <br> Utica slate in the full development of its crumbling rusty brown <br> shales its Graptolites and Triarthrus Beckii the Trenton fossils <br> having disappeared <br> Beauport Continuing our observations both on the Trenton lime- <br> stone and its connexion with Utica slate it is to be noted that at Beau- <br> port the village a little westward of Montmorenci the change is well <br> displayed <br> Two hundred yards north of Col de Salaberry's house in this <br> village we have in a quarry the genuine horizontal Trenton limestone <br> At oxAj ffty yards north of the house ' it is interstratified largely <br> with black shale and with a slight dip In the streamlet close to <br> the house the rock is the true Utica slate dipping at a high angle <br> to the S E Capt Skene R E <br> In the quarries about this village the Trenton limestone is full of <br> shale often coated with fluor-spar copper pyrites and calcedony <br> The bituminous druses are numerous and often of the size of a <br> walnut Its fossils are scattered in patches ; sometimes they are <br> altogether absent at others in inconceivable quantities Some of <br> the shaly layers are wholly composed of Trilobites especially of the <br> Asaphus gigas or oi Rhynchonella hemiplicata <br> Fig 3 Section at Petite Ruisseau R showing the relation of the <br> Utica slate to the Trenton limestone <br> Trenton limestone <br> Talus c <br> R Petite Ruisseau On the Petite Ruisseau Avhich falls into the 34983192 108767 51125 Page 89 Text v 9 http //www biodiversitylibrary org/page/34983192 1853 Geological Society of London NameFound Asaphus gigas NameConfirmed Asaphus I gigas Reed NameFound Graptolites NameConfirmed Graptolites NameBankID 423327 NameFound Rhynchonella NameConfirmed Rhynchonella EOLID 4328553 NameBankID 4331849 NameFound Triarthrus NameConfirmed Triarthrus EOLID 4324679 NameBankID 2875648 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 9 1853 Geology Periodicals Smithsonian Libraries bhl page 34983192 dc identifier http //biodiversitylibrary org/page/34983192 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-14 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12511800315 2015-08-27 10 00 22 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1853 Photos uploaded from Flickr by FĂŚ using a script | ||||
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