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| Keywords: The Quarterly journal of the Geological Society of London (12645196925).jpg 340 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY Feb 21 <br> 2 On the Tertiary and more recent Deposits in the Island of <br> Nantucket By M E Desor and Edward C Cabot <br> In a letter to Sir Charles Lyell Pres Geol Soc <br> Knowing how mnch you are interested in all inquiries about the <br> drift of this country we take the liberty to forward to you some <br> specimens of shells which we have lately collected from the cliffs of <br> Sancati Head in the island of Nantucket Allow us to accompany <br> them with some observations upon this locality <br> The cliff of Sancati as you know constitutes the eastern border <br> of the island of Nantucket rising to a height of ninety-two feet above <br> the beach Although covered in a great measure with the loose sand <br> that is carried by the wind from the beach yet there are several <br> points where the successive layers are to be seen as for example near <br> the tripod fig 1 will give an idea of their superposition <br> ¢ – r\ ' -/ ' - y \;' \yy/ ' 'i <br> Fig <br> 1 <br> 6 feet <br> « Dune sand <br> 1 <br> d Peat <br> 37 <br> c Sand with an occasional stra <br> 5 <br> 10 <br> <br> turn of coarse gravel <br> d Ferruginous gravel <br> e Sand <br> 2 <br> / Worn shells <br> 3 <br> 1 <br> <br> g Serpula <br> // Ovsters <br> 1 <br> i Tough clav ¢ <br> 4 <br> 2 <br> <br> y Homogeneous white sand <br> k Gravel <br> 20 <br> <br> / Brown clay <br> At the base of the cUff is found a stratum of brown very brittle <br> and partly sandy clay / nearly twenty feet thick Over this rests <br> a bed of gravel several feet thick A which is overlaid by a stratum <br> of homogeneous white sand J On this is found a layer of very <br> tough clay z very similar in its aspect to the plastic clay near Paris <br> except that it contains a great many nodules of ferruginous sand <br> This clay -bed is overlaid by an oyster-bank /« one foot thick inter- <br> mixed and covered by large masses of Serpula / which are like the <br> oysters in their natural position There are besides a great many <br> other shells scattered through this bank all of them in a most perfect <br> condition although it is difficult to preserve them entire when taken <br> out from the layer This oyster-bank is followed by another fossi- <br> liferous stratum / in which the shells are in a different state they <br> bear evident traces of exposure the valves of the bivalves being 35268990 109512 51125 Page 340 Text v 5 http //www biodiversitylibrary org/page/35268990 1849 Geological Society of London NameFound Serpula NameConfirmed Serpula EOLID 16660 NameBankID 238476 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 5 1849 Geology Periodicals Smithsonian Libraries bhl page 35268990 dc identifier http //biodiversitylibrary org/page/35268990 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 N02/12645196925 2015-08-27 10 53 59 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 | ||||
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