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• 12:41, 8 September 2020 Scotfot talk contribs uploaded File:GA Image 0169.jpg (Long excursion to the Berwyns. July 31st to August 7th, 1908 - Geologists' Association excursion (Geologists' Association Circular No. 97. Session 1907–1908 p.2.) Figure 1.-Cefn-Y-Fedw Section. m. Aqueduct Grit, or Upper Sandstone. l. Upper Shale. k. Dee Bridge Sandstone. j. Lower Shale and Limestone. i. Middle Sandstone. h. Cherty Shale. g. Lower Sandstone. jr. Sandy Limestone. e. Upper Grey Limestone. d. Upper White Limestone. c. Lower White Limestone. b. Lower Brown Limestone. a. Old Re...)