The book The Students Handbook of Stratigraphical Geology was written by author A J Alfred John Jukes Browne Here you can read free online of The Students Handbook of Stratigraphical Geology book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Students Handbook of Stratigraphical Geology a good or bad book?
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. . . 100 A similar series reappears in the Woolhope and Malvern districts 168 STKATIGRAPHICAL GEOLOGY and are well exposed in the cutting near Ledbury station, west of Malvern, where the sequence is as follows : Feet. Old Red marls and sandstones ..... {Ledbury shales ....... 400 Down to n sandstone ...... 90 Upper Ludlow shales ... . 140 Aymestry limestone (seen in the tunnel) From the Ledbury shales Linyula cornea with remains of Cephalaspis and Pterygotus have been obtained. The most southe...rly occurrences of Silurian rocks of Salopian type are at Fortworth, in Gloucestershire, and in the Mendip Hills, where a small inlier has recently been discovered and described. It is noteworthy that where the base of the Devonian comes to the surface in Cornwall it does not rest on Silurian but on Ordovician and older rocks, having probably overlapped the Silurian. 2. Wales The Valentian attains its greatest thickness in Central Wales where it occupies large parts of Cardigan and Kadnor, and has a maximum thickness of 5000 feet.
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