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Basic Rocks Granite Minor
Lower Lias Middle and Upper Lias
3 other sections not shown
ammonites Assoc Austell bands basal beach Bideford Black Blackdown Bodmin Moor Boscastle breccias Bude Formation calcareous Carboniferous Carboniferous rocks cassiterite Cenomanian Cenomanian Limestone Chalk chert clay cliffs coast commonly comprise conglomerates contain Cornwall and Devon Crackington Formation Crediton Culm Dartmoor Dartmoor Granite Delabole deposits Devonian Devonian rocks dykes east Exeter facies faults fauna feldspar folds formed fossils ft thick Gault Geol Geology goniatites granite gravel greisen Haldon Hill horizon igneous inland intrusion Keuper lamprophyres lavas Lias limestones Lizard locally lodes Lower Carboniferous Lyme Regis magma mainly Meldon metamorphic Middle Devonian minerals mining north Devon occur outcrop outliers overlain overlying Pebble Beds Permian Plate Plymouth probably Proc Quarry quartz region Rhaetic river sand sandstones Scilly sediments shales siltstones slates south-west England stone strata structures thin Tintagel Torquay tourmaline Triassic tuffs Upper Devonian Upper Greensand veins volcanic west Somerset yielded Zone