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| Keywords: The Quarterly journal of the Geological Society of London (13365391663).jpg 1850 <br> PRESTWICH ON THE LOWER TERTIARY STRATA <br> 261 <br> series of the Woolwich fluviatile beds and the underlying sands re- <br> posing upon the chalk <br> At Counter Hill stratum c is two feet thick and shows very <br> distinctly the irregular and worn surface of ' / on which it reposes ; <br> / is there thinner of a nearly pure white colour and contains <br> numerous small patches of small round flint pebbles On the line <br> of the Croydon Railway immediately south of the New Cross Station <br> is a section of this bed which has already been described by Mr <br> Warburton in I844t For the sake however of showing its con- <br> nexion with the foregoing details I here give a diagram of that part <br> of the cutting showing the conglomerate bed at the base of the Lon- <br> don clay See fig 8 <br> Fig S ” Section at New Cross <br> b London clay; tough brown clay with septaria but without <br> organic remains <br> remains <br> Dark ochreous sand full of round flint pebbles No organic <br> _ / Yellow sand and clays forming the upper part of the series <br> _ '1 of the Woolwich fluviatile beds hereafter to be described <br> The chalk has been reached at a depth of about 100 feet beneath <br> stratum c <br> We must now make a slight deviation in order to examine a well- <br> section at Hampstead the particulars of which were communicated <br> to the Geological Society in 1834 by Mr Wetherell J It was shown <br> that the London clay was there underlaid by a compact rock five <br> feet thick formed of green sand with numerous round flint pebbles <br> and cemented by carbonate of lime reposing upon a series of sands <br> and mottled clays overlying the chalk <br> The following are the organic remains he gives from this rock ” <br> Rostellaria lucida Sow Sow- Pleurotoma <br> erbyi Mant Venus incrassata Desk sp Cytherea <br> Natica glaucinoides Sovj obliqua Desk <br> Nucula Scales and teeth of fishes <br> Panopsea intermedia Sow Lignite <br> Cardium nitens Sow <br> We are now arrived at a point of considerable difliculty So far <br> the range of this stratum has been regular and the line of demar- <br> cation between it and the upper part of the mottled clays and sands <br> has been well-marked ; but on reacliing the neighbourhood of Croy- <br> don and London a difFerent order of things commences The <br> mottled clays disappear except in small quantities and in a few <br> places ; large and thick beds of round pebbles set in interstra- <br> tified with a peculiar series of fluviatile and freshwater beds The <br> London clay recedes further to the north leaving a large and more <br> For a better section than any now exposed of these beds see Dr Buckland's <br> paper in the Trans Geol Soc vol iv p 285 ; also Phillips and Conybeare's Out- <br> lines of the Geology of England p 49 <br> t Quarterly Journal of the Geological Society vol i p 1 72 See also Phillips <br> and Conybeare Geology of England p 48 <br> t Trans Geol Soc 2nd Series vol v p 131 36934116 113689 51125 Page 261 Text v 6 http //www biodiversitylibrary org/page/36934116 1850 Geological Society of London NameFound Cardium nitens NameConfirmed Canthium nitens DC EOLID 1295347 NameFound Cytherea NameConfirmed Cytherea EOLID 56636 NameBankID 976114 NameFound Natica glaucinoides NameFound Nucula NameConfirmed Nucula EOLID 10719654 NameBankID 2691879 NameFound Panopsea intermedia NameConfirmed Panopaea intermedia NameFound Pleurotoma NameConfirmed Pleurotoma EOLID 3035199 NameBankID 4302856 NameFound Rostellaria lucida NameFound Venus incrassata NameConfirmed Venus incrassata Brocchi 1814 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 6 1850 Geology Periodicals Smithsonian Libraries bhl page 36934116 dc identifier http //biodiversitylibrary org/page/36934116 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-23 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13365391663 2015-08-26 11 56 14 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1850 Photos uploaded from Flickr by Fæ using a script | ||||
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