The Building of the British Isles: A Study in Geographical Evolution

Atlantic basin beds beneath border Boulder-clay breccias British Bunter calcareous Cambrian Carboniferous Limestone central Chalk Channel Coal-measures coast coast-line conglomerates consist contain Crag Cretaceous deposits Devon Devonian district east eastern eastward edition England Eocene epoch erosion estuarine evidence existence extended fact fathoms fauna feet thick formation formed fossils fresh-water Geikie geography Geol geological Glacial Hills infer Ireland island Isle Journ Jurassic lacustrine lake land London Clay Longmynd Lower Carboniferous marine marls miles Millstone Grit north-east north-west northern northward occur ocean Old Red Sandstone older Oolite Ordovician overlap Paleozoic pebbles period Permian Plate Pliocene portions Portrait present probably Professor Bonney Quart quartzite region ridge rivers sand schists Scotland sediment shales shallow shore Shropshire Silurian slates southern southward stones strata submerged subsidence surface thin tract Trans Trias Triassic unconformity upheaval Upper Old Red valley volcanic Wales Wealden western westward