Transactions of the Royal Geological Society of Cornwall, Volume 17

axinite B.Sc beds biotite Bodmin boulders Camborne Carboniferous Carn Brea cassiterite chlorite clay cleavage cliff coast coastline Colenso colour copper Cornish Cornwall Council Cove crystals Culm Delabole deposits depth Devon Devonian district dyke E. H. W. BOLITHO East elvan erosion Falmouth feet felspar fissures folds fossils garnet Geol Geological Society granite gravel green greenstone grey grit Head Hill intrusions J. H. Collins Karroo killas Kit Hill Land's End lode lower Marazion marine mass mica miles minerals Museum occur outcrop Padstow peat pebbles pegmatite Penzance Perranporth phyllite pillow lava pitchblende platform Pliocene present Profr quarry quartz Radium raised beach Redruth river Road ROBSON rocks rounded Ruhuhu sand Sandstone School of Mines sea level shaft shales slate specimens streams surface temperature thick tion torbernite tourmaline Trebetherick types upper uranium valleys veins volcanic West Wheal zone