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Volcanic Features term index

Terms A aa aa lava acid active adamellites alkali granites amygdules anticline ash ash cone B basalt basaltic basic batholith batholiths blister cones block lava blocks/bombs C caldera cinder cinder cone cinders columnar jointing composite composite volcano conchoidally conduit cone sheets crater craters crystalline D dike dike swarms dikes dormant E ejected pyroclastic material extinct F feldspar fissure eruption fissures flow banding fumarole G geyser granite granodiorites H harpolith harpoliths hot spring L laccolith laccoliths lapilli lava lava tube/cave lava tunnel lavas lopolith lopoliths M magma magma chambers magmas massive mud volcano O obsidian orogenic P pahoehoe pahoehoe lava paint pot phacolith phacoliths pillow lava plug plug dome plug volcano plutons pumice pyroclastic eject pyroclasts Q quartz R rhyolite ring dike ropy/corded lava S scoria lava shield shield volcano sill sills spatter spatter cone stock stocks strata stratovolcano syncline T tabular V vesicles vesicular volcanic features volcanic neck volcanic plug volcano vulcanism extrusive igneous rocks vulcanism intrusive igneous bodies vulcanism intrusive igneous rocks vulcanism massive plutons vulcanism related features vulcanism tabular plutons vulcanism volcanic features vulcanism volcanoes X xenolith

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