Related by context. Frequent words. (Click for all words.) 56 basalt 55 marine sediments 54 lavas 54 volcanic 53 basaltic 52 basalts 52 volcanic rock 51 magma chamber 51 lava flows 51 volcanic crater 50 lava tube 50 ejecta 49 tuffs 49 sediments 49 volcanism 49 caldera 49 lava 48 geologic 48 granitic 48 sedimentary rock 48 sediment 48 calcareous 47 lithosphere 47 magmatic 47 oceanic crust 47 calcite 47 crustal 47 olivine 46 peridotite 46 landforms 46 Younger Dryas 46 glacial till 46 sedimentary 46 pumice 46 mudstone 46 glacial lake 46 glacial ice 46 glaciers 45 eruptive 45 silty 45 methane hydrates 45 lakebed 45 geologically active 45 volcanic rocks 45 talus 45 limestones 45 volcanic gases 45 volcanically active 45 silicates 45 Kilauea Volcano 44 mineralizing 44 Sediments 44 igneous 44 iron oxides 44 volcanoes 44 polar caps 44 landform 44 glaciation 44 glacier 44 meltwater 44 lahar 44 zircons 44 breccias 44 mudflows 44 alluvium 44 magma 44 fluvial 43 Meridiani 43 icecap 43 geomorphology 43 lava flow 43 molten rock 43 continental crust 43 water vapor 43 outcrop 43 molten lava 43 stalagmite 43 volcanic debris 43 Quaternary 43 brecciation 43 sedimentary rocks 43 glaciated 43 argillite 42 geologically 42 rockfalls 42 sandstone 42 Pinatubo 42 volcanic eruptions 42 carbonate rocks 42 stalagmites 42 alpine lakes 42 overlies 42 lake sediments 42 icecaps 42 sulphide bearing 42 silica 42 meteoroids 42 silicate 42 lichen 42 plate tectonics 42 crater