MAKE A MEME
View Large Image
| View Original: | The_Quarterly_journal_of_the_Geological_Society_of_London_(12645089653).jpg (1179x1985) | |||
| Download: | Original | Medium | Small | Thumb |
| Courtesy of: | commons.wikimedia.org | More Like This | ||
| Keywords: The Quarterly journal of the Geological Society of London (12645089653).jpg 1848 PRESTWICH ON STRATA OF CHRISTCHURCH HARBOUR 45 <br> Section of the Cliff at Hengistbury Head <br> Fig 2 <br> Feet <br> Ochreous flintgravel <br> Sandy clays <br> White clayey sands full <br> of vegeta ie remains <br> Clay much mixed with <br> sands white green <br> Dark grey clay much <br> mixed with patches of <br> greensand <br> Rounded flint pebbles <br> in white sand <br> These beds form one se- <br> ries and pass one into <br> the other It contains <br> large flat very ferru- <br> ginous septaria full of <br> carbonized vegetable <br> fragments and with a <br> very few casts of shells <br> In the lower bed of <br> clay casts of shells are <br> also very rarely found <br> but in parts of the clays <br> above they are not un- <br> common; a few pebbles <br> occur throughout <br> Whitish sand full of small fragments of carbonized vegetable <br> remains About mile west of the headland the car- <br> bonaceous matter so greatly increases that the upper part <br> of the sand for a thickness of 5 feet passes into a black <br> carbonaceous sand The thickness of this stratum is <br> not seen in this part of the cliflFs <br> have the same well-marked bed of black flint pebbles varying in size <br> from a marble to a swan's egg and imbedded in white and yellow <br> sand and forming a perfect gravel-bed Above these are the clays <br> rather more sandy it is true at Hengistbury Head than in Barton <br> cliff and the septaria more ferruginous but with no character of any <br> value as indicating difference of origin In further corroboration we <br> have the evidence scanty though it be of organic remains In the <br> lower part of the clay at Hengistbury Head they are extremely <br> scarce I only found one cast of a small Modiola and some teeth of <br> the Lamna Rather higher in the section and at a short distance <br> west of the Head I however found very friable but abundant re- <br> mains of Barton clay species of Panopsea Solen Cytherea Pectun- <br> culus and Venericardia Of themselves these few fossils would be <br> insufficient to determine the age of these clays Several of them <br> equally mark the Bracklesham beds though on the whole they pro- <br> bably more resemble those of the Barton clays ; but this fact being <br> supported by a superposition and by lithological characters agreeing <br> with the lower beds of the Barton clay at Barton it follows that the <br> weight of evidence is in favour of their belonging to this series I <br> had not time to work out more fully the organic remains of this bed <br> but a further search would I am convinced bring many more to <br> light There is a brick-pit recently opened immediately on the eastern <br> side of the headland at which I requested the men to collect any <br> specimens they might meet with <br> The septaria although containing almost exclusively carbonized <br> fragments of plants and imperfect vegetable impressions also showed <br> traces here and there of shells The ' Teredo antenauta was far <br> from uncommon in some of the large fossil stems of trees which are <br> found both in the clays and in the septaria I would also call atten- <br> tion to the occasional occurrence in a tolerably perfect state of the 35268683 109512 51125 Page 45 Text v 5 http //www biodiversitylibrary org/page/35268683 1849 Geological Society of London NameFound Cytherea NameConfirmed Cytherea EOLID 56636 NameBankID 976114 NameFound Lamna NameConfirmed Lamna EOLID 24907 NameBankID 4935667 NameFound Modiola NameConfirmed Modiola EOLID 71417 NameBankID 2647821 NameFound Ochreous flintgravel NameFound Solen NameConfirmed Solen EOLID 57496 NameBankID 2693323 NameFound Teredo NameConfirmed Teredo EOLID 56957 NameBankID 4935020 NameFound Venericardia NameConfirmed Venericardia EOLID 57588 NameBankID 2693145 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 5 1849 Geology Periodicals Smithsonian Libraries bhl page 35268683 dc identifier http //biodiversitylibrary org/page/35268683 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-20 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12645089653 2015-08-27 10 56 57 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1849 Photos uploaded from Flickr by Fæ using a script | ||||
.jpg){kind=link}
