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| Keywords: The Quarterly journal of the Geological Society of London (14072584831).jpg 162 <br> A J JUKES-BEOWKE 0 S SOME POSTGLACIAL RAYIXES <br> waters flowed south-eastward to join the main stream in the <br> Calceby valley <br> 2 Valleys near Louth ” Two other similar cases occur in the <br> neighbourhood of Louth The Wolds here see plan fig 2 are inter- <br> sected by two ancient valley-systems both of which are largely occu- <br> pied by drift; and in neither case does the modern watercourse <br> coincide entirely with the line of the ancient valley <br> Y\ 2 ” Plan oflthe Valleys near Louth Scale 1 inch to a mile <br> Drift indicated as in fig 1 <br> The main stream of the river Ludd takes its rise from springs <br> near the village of Welton about 3 miles west of Louth For about <br> a mile this stream runs in the ancient valley over a bottom of Boulder- <br> clay ; but although the old valley still continues eastward as a well- <br> marked hollow the modern stream turns suddenly southward and <br> enters a narrow winding ravine the sides of which are far too steep for <br> the plough and have in consequence been laid out as plantations This <br> ravine has a length of about three quarters of a mile and then opens <br> into a broader valley running eastward and joining the old main <br> valley at a point about one mile and a quarter west of Louth church <br> A tongue of Boulder-clay runs up this broad valley for about half <br> a mile proving it to have been a tributary of the ancient main <br> valley ; the stream therefore has here made a new cut three quarters <br> of a mile long from the main valley into one of its tributaries and <br> thence its course coincides with the continuation of the ancient valley <br> in which the town of Louth now stands <br> The narrow wooded ravine above mentioned is known as Welton <br> Yale and is one of the sights of the neighbourhood of Louth Its <br> jiepth at the southern entrance is about 60 feet and the sudden <br> change from the ordinary scenery of open chalk valleys to a steep- <br> sided ravine which has more the aspect of a Derbyshire or Yorkshire <br> vale is very remarkable The clear beck rippling over its stony bed <br> I 36940933 113697 51125 Page 162 Text 40 http //www biodiversitylibrary org/page/36940933 1884 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 40 1884 Geology Periodicals Smithsonian Libraries bhl page 36940933 dc identifier http //biodiversitylibrary org/page/36940933 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-30 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/14072584831 2015-08-26 05 55 49 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1884 Photos uploaded from Flickr by Fæ using a script | ||||
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