Proceedings of the Geologists' Association, Band 83

abundant andesite associated Band Barton basalts basin bioturbated blocks brachiopods burrows Carboniferous Chalk cleavage conglomerate continental correlation Cretaceous cross-bedding Damery Damery Beds deposits Devonian east environment Eocene erosion exposed exposure facies fault fauna Fawley Field Meeting folds Formation fossils Freshwater Gault Geology glauconitic granite gravel grey Holocene horizon indicates Inlier ironstone Jl geol junction bed Jurassic Láncara lavas limestone Llandovery Locality London Clay Lower marine Marl mudstones Mullock Bridge Mundays Hill occur Old Red Sandstone Ophiomorpha outcrop party pebbles Pembrokeshire phosphatic nodules Plate Pre-Cambrian Proc Quarry quartz River rocks Rosemarket sands sandy sediments seen sequence Series shales shells silt siltstones silty Silurian Skiddaw Slates Sowerby spathi spathi Subzone species specimens Stone stratigraphical structures Subzone age succession suggests surface syncline tectonic thick thin Tortworth tuffs unconformity Upper Llandovery Uriconian valley Wales Weald Wenlock zone