The Quarterly Journal of the Geological Society of London, Volumen 75

abundant andalusite anticline aplite appear awarded Barnwell Basin Blackheath Blackheath Beds borings boulders calcite Cambridge Carboniferous cent Chalk Clay-with-Flints colour contain Cretaceous crystals D.Sc dark igneous deposits Draparnaud Durham dyke east Eocene evidence feet felspar flints formation fossils fragments G. W. LAMPLUGH Geol Geological Survey geologists Glacial Glacier grains granite gravel grey ice-sheet igneous rock inches inclusions Jurassic later limestone Linnæus Linné loamy London Clay Lower LXXVI marble marine mass material Medal Meldon aplite mica miles Millstone Grit mineral Müller northern Nummulitic occur Oolites origin outcrop paper pebble-beds pebbles Pleistocene present probably Prof Q. J. G. S. vol quarry quartz quartz-pebbles Reading Beds Redaven river rutile sand Sandstone sarsens shales sheet shells similar Society South species specimens structure surface Surv teeth Tertiary thickness tourmaline upper valley Weald Wealden Worms Heath Yorkshire