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| Keywords: The Quarterly journal of the Geological Society of London (12736062034).jpg AND CAHORE SHINGLE BEACH CO WEXFORD <br> 35 <br> back wash A fig 1 of each wave will carry a quantity of sand and <br> the like with it which at the junction B with the incoming wave <br> Fig 1 ” Diagram of a Wind-wave breaking on a shelving beach <br> will be met tossed about and carried back again ; but if the tide is <br> ebbing scarcely any particles will be carried by the back wash and <br> the junction B with the incoming wave will scarcely have even a <br> particle of sand in it In the first case a bucketful taken at the <br> junction would be sand and water while in the second it would bo <br> nearly pure water <br> Third Point ” Currents carry the smallest fragments furthest <br> Tidal currents are different from other currents They break on the <br> shore in successive waves whether these be augmented by wind- <br> waves or not drive the fragments obliquely up the beach the larger <br> ones to remain or only to be brought back a little way while the <br> smaller ones are caught in the back wash and carried back again <br> till they meet the succeeding incoming wave Thus the larger frag- <br> ments have a tendency to be driven higher and further up and <br> along a beach than the smaller ones Also if the progress of a <br> beach is stopped by a groyne whether natural or artificial the <br> larger pebbles accumulate behind it and form a shingle beach <br> Chesil and Cahore beaches are remarkable on account of their <br> being very similarly circumstanced in several particulars; this will be <br> evident from the following table of comparison All the statements <br> in regard to the Cahore beach are given from personal examination ; <br> but for those relating to the Chesil beach we have to rely on the <br> notes and publications of other observers Some of the points of <br> comparison are partly speculative but agreeable with the known <br> results of certain natural laws <br> A Comparison of the Conditions at the Chesil Beach Dorsetshire <br> and at the Cahore Shingle Beach co Wexford <br> Chesil Beach <br> 1 The beach is situated on <br> the north side of the English <br> Channel where there is a smaller <br> rise 1 ' of the tide than on the <br> south side coast of France <br> Cahore Shingle Beach <br> 1 The beach is situated on the <br> west side of the Irish Sea where <br> there is a smaller rise of the <br> tide than on the east side coast <br> of England <br> d2 35818088 110705 51125 Page 35 Text 33 http //www biodiversitylibrary org/page/35818088 1877 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 33 1877 Geology Periodicals Smithsonian Libraries bhl page 35818088 dc identifier http //biodiversitylibrary org/page/35818088 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-24 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12736062034 2015-08-26 19 51 50 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1877 Photos uploaded from Flickr by Fæ using a script | ||||
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