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| Keywords: The Quarterly journal of the Geological Society of London (13204465145).jpg BKECKNOCKSBXRE AND EAST GLAMOKGANSHIKE <br> 45 <br> Fig 2 Section of Boulder-clay and Flint-bearing Gravel Ely <br> Valley St George's near Cardiff Scale 1 inch to 6 feet <br> Winnowed Boulder-clay <br> Boulder-clay <br> Coarse compact gravel with Chalk flints <br> Sand and plant-remains <br> Coarse gravel with Chalk flints <br> ' Sand and plant-remains <br> Coarse gravel Chalk flints limonite <br> Sand fine gravel and plant-remains <br> Firmly cemented pebble-gravel Chalk flints <br> 6 'fi lf m I Fine S ravel and sand ' i 11 la y er s of limonite plant- <br> remains and Chalk flints <br> Well-rounded pebbles of Carboniferous Sandstone <br> 4 in in diameter bedded in ferruginous sand <br> Height above sea-level about 80 feet <br> Gravel composed of pebbles of Carboniferous Sandstone Carboniferous Lime- <br> stone Old Red Sandstone Old Eed Conglomerate Millstone Grit and <br> Triassic Sandstone - the largest being 8 inches in diameter and only par- <br> tially rounded About 95 per cent of the pebbles are Carboniferous <br> Sandstone Besides pebbles of quartz and Lydian stone one of veinstone <br> and another of quartz-porphyry have been found associated with the Chalk <br> flints <br> 2 Boulder-clay occurs in patches filling depressions over the whole <br> area to which this paper refers In most places it exhibits the <br> same characteristics of a stiff compact clay varying in colour and <br> composition according to the nature of the substratum The in- <br> cluded stones vary in size from mere pebbles to blocks 4 or 5 <br> feet in diameter Nearly all the stones in the Boulder-clay are <br> smoothed rounded and often intensely glaciated principally in the <br> direction of their longer axes Its thickness ranges from about 100 <br> feet at Pont Sarn in the Taff-fechan valley to 30 feet at St <br> Eagans in the Ely valley Its height above the sea-level varies <br> from above 1200 feet at Dowlais Top to 20 feet in the Ely valley <br> at St Fagans The Ely valley Boulder-clay is distinguished from <br> that of the coal -basin and south Brecknockshire by containing Chalk <br> flints These also underlie the Boulder-clay as already stated at <br> St George's in the Ely valley 36928622 113681 51125 Page 45 Text 39 http //www biodiversitylibrary org/page/36928622 1883 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 39 1883 Geology Periodicals Smithsonian Libraries bhl page 36928622 dc identifier http //biodiversitylibrary org/page/36928622 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-16 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13204465145 2015-08-26 13 53 40 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1883 Photos uploaded from Flickr by FĂŚ using a script | ||||
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