Related by context. Frequent words. (Click for all words.) 61 pyroclastic 58 hydrothermal fluids 58 andesitic 58 clasts 57 pyroclastic flow 56 magma chamber 56 Lava flows 56 fumaroles 54 steam vents 54 igneous rock 54 silts 53 carbonate minerals 53 lava flowing 53 lava 52 pyroclastic flows 52 Sulfur dioxide 52 kaolinite 52 carbonaceous 52 graben 52 hydrothermally altered 52 glacial till 52 loess 52 clastic 52 tonalite 51 ash spewed 51 unmineralized 51 chalcopyrite mineralization 51 stockwork veining 51 surficial 51 peridotite 51 volcanic gases 51 sulfide minerals 50 hydrothermal activity 50 interbedded 50 basaltic 50 magma 50 volcanic 50 overpressure 50 gabbroic 50 explosive eruptions 50 jasperoid 50 lava flows 50 granitic rocks 50 pentlandite 50 sandstone formations 50 vuggy silica 50 lava rocks 50 graphitic 50 molten rock 50 volcanic rock 50 dacite 50 erosional 50 mudstone 50 Mineralization occurs 49 subcrop 49 uraniferous 49 alluvium 49 basalt rock 49 gossanous 49 boulders 49 iron oxides 49 felsic 49 tuffs 49 lahars 49 ash 49 hydrothermal breccia 49 breccia zone 49 mudstones 49 mudflows 49 temperature inversions 49 hardened lava 49 sulphates 49 carbonate alteration 49 mafic volcanic 49 greywacke 49 #,#-#,# ft. Loc 49 breccia pipes 48 talus 48 felsic volcanic 48 magmas 48 lava flow 48 Dense smoke 48 liquid droplets 48 copper oxides 48 siliceous 48 andesite 48 quartz carbonate veins 48 gabbro 48 quartz monzonite 48 crater 48 pyrite mineralization 48 basalt 48 pyritic 48 insitu 48 NW trending 48 upslope 48 plumes 48 breccia 48 silica dust 48 combustion gases 48 breccias