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| Keywords: The Quarterly journal of the Geological Society of London (13206113373).jpg 384 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY May 26 <br> supposition that the London clmj cropped out in these valleys as for <br> instance in the valleys of Chobham and Blackwater Such however <br> is apparently not the case On the level of the first of these valleys <br> the upper part of the lower sands and lower part of the central green <br> sands outcrop and in the second the upper part of these green sands <br> is at or near the surface In both cases the London clay is still covered <br> by the 100 to 130 feet of lower Bagshot sands <br> The following section shows the relation of these strata ” <br> s <br> Valley of Chobham <br> Fig 4 <br> Chobham Place <br> d Upper Bagshot Sands ' ' - f' ff0li89irp i <br> Yellow siliceous sands sarif Iria Ya 4b KSi a a8L adt 'i'lB At; 100 feet <br> b Middle Bagshot Sands ab Jjjj lo aoii «mi£ 45 <br> 1 Clays; brown yellow and greenish - r ' ~ –º- i <br> 2 Clayey green sands full of impressions of bsirea C6fb'utd Turritella Venericardia c <br> See List of Fossils p 390 <br> 3 Foliated white brown and yellow clays with traces of vegetable impressions <br> c Lower Bagshot Sands - – » i t i <br> Light yellow siliceous sands 83ij M i W J iUfU'120 feet <br> d London Clay upper part of ' ; See 'H//3ay 3jeMi ec; fig dO ffoLiTlx/j <br> Section where proved -jfXT-g g-fj- ygiij jj5jr t ; vnolorf 5« »A sV- <br> Vj r 5in iinjo o '- - o '-' – ' ¢' ' ' ' '-9iidW ij BiBiia U <br> giffoC Â¥IZ H 99a pper Bagshot Sands io ~ A' M haRh U <br> Incumbent on these green sands is the upper and main mass of the <br> Bagshot sands Having fewer distinct argillaceous beds than occur <br> in the lower sands the stratification of this division is not so well <br> marked and appears more confused and the sections in it are alsq <br> rarer <br> This division consists of irregular-bedded sands of a light yellow <br> colour occasionally slightly tinged green red or ochreous and as a <br> whole rather darker in its tint than the lower sands <br> Its superposition on the central green sands is in every instance <br> where the latter are visible very apparent This structure is tolerably <br> apparent on the range of hills two miles north of Chobham on the <br> side of which the green sands in some places very fossihferous may <br> occasionally be seen outcropping see fig 4 <br> Small ironstone concretions are common in this division and <br> amongst these concretions may sometimes be detected traces of or- <br> ganic remains The well-known blocks of light-coloured or nearly <br> white saccharine sandstone are met with chiefly in the upper beds <br> of these sands generally just below the gravel They are found by 36933145 113687 51125 Page 384 Text v 3 http //www biodiversitylibrary org/page/36933145 1847 Geological Society of London NameFound Turritella NameConfirmed Turritella EOLID 52187 NameBankID 2683895 NameFound Venericardia NameConfirmed Venericardia EOLID 57588 NameBankID 2693145 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 3 1847 Geology Periodicals Smithsonian Libraries bhl page 36933145 dc identifier http //biodiversitylibrary org/page/36933145 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 N02/13206113373 2015-08-26 12 53 27 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1847 Photos uploaded from Flickr by Fæ using a script | ||||
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