Keywords: The Quarterly journal of the Geological Society of London (12960183603).jpg OP THE N W MIDL Vl D AND EASTERN COUN'TIES l79 <br> in many places covers the middle sand-and-gravel formation as <br> around Whittington Oswestry c South of Ellcsmere it capriciously <br> caps the large sand-and-gravel mounds eskers covers portions <br> of their sides or lurks in the hollows between them ; but the sharp <br> line between the npper clay and the underlying gravel or sand so <br> strikingly displayed all around the Irish Sea is frequently absent <br> The subglacial mud or source of supply in the Lake-district to <br> which the uniform character of the clay over extensive areas is <br> chiefly owing would appear to have been carried by the currents <br> which floated the boulder- laden ice in a southerly direction by way <br> of Whitchurch and Shrewsbury to Berrington where the Upper <br> Boulder-clay is scarcely distinguishable in appearance from the <br> horizontally continuous formation in Cheshire and Lancashire <br> In the extensive clay-pits lately opened near the Shrewsbury new <br> barracks the clay is a facsimile of the Upper Boulder-clay of <br> Cheshire and Lancashire and the same in composition with the <br> exception of the absence of lime which apparently did not fi nd its <br> way from the Carboniferous rocks of the southern border of the Lake- <br> district so far south as Shrewsbury In these claj'-pits there is <br> generally a sharp line between the clay and the underlying sand <br> which in some places is contorted and which is said to reach a <br> thickness of 90 feetf Most of the erratics in the clay are from the <br> Welsh borders Not more than one out of several hundred consists <br> of granite J The stones are generally angular or sub angular ; and <br> exceedingly few of them are flattened or distinctly striated jN'ear <br> the ferry a short distance south of the Shrewsbury Welsh bridge <br> the upper clay somewhat in the form of a wrapper covers a large <br> mound of shelly sand and fine gravel in the lower part of which several <br> granite Eskdale and Criffel boulders have been found see fig 1 <br> The upper clay more or less underlain by sand is well represented <br> Fig 1 ” Section near tJie Shrewsbury Welsh Bridge <br> A Upper Clay B Sand and fine grayel C Talus <br> I had not discovered this southerly extension of the upper clay when my <br> paper on sections around the estuary of the Dee Quart Juurn Geol Soc for <br> Kovember 1877 was -written <br> t The sand contains streaks and fragments of coal <br> \ Granite however is rather abundant in the lower unstratified gravel of <br> the neighbourhood 36090522 111264 51125 Page 179 Text 36 http //www biodiversitylibrary org/page/36090522 1880 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 36 1880 Geology Periodicals Smithsonian Libraries bhl page 36090522 dc identifier http //biodiversitylibrary org/page/36090522 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-06 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12960183603 2015-08-26 16 53 07 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1880 Photos uploaded from Flickr by Fæ using a script |