MAKE A MEME
View Large Image
| View Original: | The_Quarterly_journal_of_the_Geological_Society_of_London_(13365649644).jpg (1252x2073) | |||
| Download: | Original | Medium | Small | Thumb |
| Courtesy of: | commons.wikimedia.org | More Like This | ||
| Keywords: The Quarterly journal of the Geological Society of London (13365649644).jpg 266 PROCEEDINGS OF THE GEOLOGICAL SOCIETY Jan 23 <br> follow the northern outcrop of this deposit to Woodbridge Taking <br> a line by Newbury and then northward of Woolhampton to Reading <br> I know of but one tolerable section of this bed ; it occurs in a brick- <br> field on the summit of the hill at Englefield near Theale The <br> London clay caps the hill to the depth of twenty to thirty feet It <br> is brown and sandy and contains at its base a band of tabular septaria <br> very ferruginous and containing a few rounded flint pebbles These <br> septaria are occasionally full of the casts of the following shells ” <br> Cardium Panopaea intermedia Sow <br> Calyptraea trochiformis LamJc Pectunculus Plumsteadiensis Sow <br> Ditrupa plana Sow sp Rostellaria Sowerbyi Mant <br> Nucula Soft brown wood in fragments <br> Natica Teeth of Lamnae <br> The sands and mottled clays outcrop immediately under these beds <br> and the chalk appears at the northern base of the hill <br> At Reading Mr Rolfe has pointed out a thin stratum overlying the <br> Plastic clay series and containing the following organic remains f <br> Cytherea obliqua Desk Ditrupa plana Sow sp <br> Pectunculus brevirostris Sow Modiola elegans Sow <br> Natica glaucinoides Sow <br> In addition to these I have found <br> Cardium Plumsteadiense Sow Scalaria <br> nit ens Sow Ostrea <br> But by far the best section and one showing a considerable length <br> of the basement bed of the London clay was exhibited on the line of <br> the Great Western Railway at Sonning Hill between Reading and <br> Twyford The cutting which is sixty to seventy feet deep and about a <br> mile long traverses the mottled clays These are covered in the <br> highest parts of the cutting by three to four feet of brown clay with <br> subordinate and irregular layers of yellow sand the whole mixed with <br> seams and patches of greensand and with some round flint pebbles <br> Irregular layers and masses of these materials cemented by carbonate <br> of lime and full of well-preserved shells are of common occurrence <br> See fig 12 A thick bed of ochreous flint gravel caps the section <br> Fig 12 ” Section at Sonning Hill <br> a Ochreous flint gravel <br> b Brown London clay with septaria <br> c Yellow sand with irregular seams of brown clay <br> and green sand ; a few round flint pebbles and <br> numerous tabular calcareous concretions Fossils <br> dispersed throughout but peculiarly abundant <br> in the calcareous blocks Thickness varies from <br> 4 to 5 feet <br> d Upper part of the sands and mottled clays Sur- <br> face worn and irregular <br> The chalk lies at about 70 to 80 feet below c but is not exposed <br> I have found traces of this stratum at several places on the hills both to the <br> N E and S W of Theale but only in small road-side cuttings <br> t Trans Geol Soc 2nd Ser vol v p 127 The similarity of the organic re- <br> mains of these beds at Reading Watford Hampstead and some other places has <br> already been pointed out by Mr John Morris so far back as January 1837 Proc <br> Geol Soc vol ii p 452 Jn the determination of the fossils of many of these <br> lists I have to express my obligation to Mr Morris 36934121 113689 51125 Page 266 Text v 6 http //www biodiversitylibrary org/page/36934121 1850 Geological Society of London NameFound Calyptraea trochiformis NameConfirmed Calyptraea trochiformis EOLID 4850559 NameBankID 6418131 NameFound Cardium NameConfirmed Cardium EOLID 50301 NameBankID 2693257 NameFound Cytherea obliqua NameFound Ditrupa plana NameConfirmed Ditrupa plana NameFound Modiola elegans NameConfirmed Modiola elegans NameBankID 6464534 NameFound Natica NameConfirmed Natica EOLID 58662 NameBankID 2684906 NameFound Natica glaucinoides NameFound Nucula NameConfirmed Nucula EOLID 10719654 NameBankID 2691879 NameFound Ostrea NameConfirmed Ostrea EOLID 10719983 NameBankID 2692450 NameFound Panopaea intermedia NameConfirmed Panopaea intermedia NameFound Pectunculus NameConfirmed Pectunculus EOLID 4728114 NameBankID 4286045 NameFound Pectunculus brevirostris NameConfirmed Pectunculus brevirostris NameBankID 6464541 NameFound Plumsteadiensis NameFound Rostellaria NameConfirmed Rostellaria EOLID 4873050 NameBankID 3940657 NameFound Scalaria NameConfirmed Scalaria EOLID 4856646 NameBankID 245500 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 6 1850 Geology Periodicals Smithsonian Libraries bhl page 36934121 dc identifier http //biodiversitylibrary org/page/36934121 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 N02/13365649644 2015-08-26 12 00 05 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 | ||||
.jpg){kind=link}
