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| Keywords: The Quarterly journal of the Geological Society of London (12513440874).jpg 386 <br> PEOCEEDrNGS OF THE GEOLOGICAL SOCIETY <br> May 8 <br> land stood low enough for the kames at Biagley to be deposited the <br> valley of the Aire would have been a frith through which the tide <br> may have set in opposite directions alternately and thus the sand <br> might be bedded both uj and down dale I can see no other way <br> than by a tidal current setting backwards and forwards through a <br> strait in which sand and gravel can be deposited with a dip both up <br> and down dale <br> The close connexion of kames with ordinary scratched drift is <br> well seen in the vale of York The western side of that vale con- <br> sists of low undulating hills of drift This drift is sometimes a well- <br> scratched deposit of typical Boulder-clay containing intercalated <br> seams of fine sand and gravel or a deposit of scratched pebbles too <br> stony to be called Boulder-clay ; the true Boulder-clay and the <br> gravel passing gradually into one another At other times the beds <br> consist of stratified gravel with here and there a faint trace of <br> scratches that once existed but are now all but effaced These <br> gravels have the characteristic shape of kames ; they either form <br> long ridges nearly straight or ai'e arranged in confused heaps sur- <br> rounding hollows ; but the scratched and the unscratched gravels <br> are quite inseparable from one another <br> In some gravel-pits near York the structure of these kames <br> is well seen There we have at the Coplesham gravel-pit the <br> foUowinar section ” <br> Section in Coplesham Gravel Pit <br> a Strong clay b Gravel c Sand <br> Gravel <br> Gravel <br> The upper part A consists of a stifi' brown unstratified clay con- <br> taining a few scattered pebbles in its upper part but choke-full of <br> stones in its bottom where it rests on the lower bed B which is a <br> well-stratified gravel and sand arranged in the shape of a ridge the <br> beds dipping away on both sides from the crown of an arch <br> I saw no scratched stones here ; but corresponding stratified <br> gravels on the other side of the Ouse contain numerous well-glaciated 34985435 108770 51125 Page 386 Text v 28 http //www biodiversitylibrary org/page/34985435 1872 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 28 1872 Geology Periodicals Smithsonian Libraries bhl page 34985435 dc identifier http //biodiversitylibrary org/page/34985435 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-14 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12513440874 2015-08-27 10 57 05 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1872 Photos uploaded from Flickr by Fæ using a script | ||||
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