Related by context. Frequent words. (Click for all words.) 67 volcanic crater 61 mud volcanoes 61 volcanic peaks 61 Valles Marineris 61 massif 60 lava tubes 59 escarpments 58 limestone cave 58 limestone caves 58 cenote 58 caldera 58 stalactite 58 lava flowing 57 deep gorges 57 limestone formations 57 rocky outcrops 57 lava 57 cenotes 57 dormant volcano 57 limestone cliffs 57 towering peaks 57 supervolcano 56 volcanically active 56 sandstone cliffs 56 lava tube 56 fiords 55 sandstone formations 55 Olympus Mons 55 steam vents 55 craggy mountains 55 lush rainforest 55 extinct volcano 54 towering cliffs 54 magma chamber 54 fiord 54 volcanic 53 lava flows 53 volcanoes 53 basaltic 53 erupting volcanoes 53 Chicxulub 53 jagged peaks 53 stalactites 53 active volcanoes 52 crater 52 Namib Desert 52 hot springs 52 molten lava 52 precipices 52 graben 52 volcanic vents 52 glaciated 52 basalt 52 hydrothermal vent 52 stromatolites 52 stalagmites 51 lavas 51 rock outcroppings 51 volcanic islands 51 melting glacier 51 clasts 51 underwater caves 51 lava rocks 51 pyroclastic 51 forested slopes 51 waterfalls 51 boulder strewn 51 ammonites 50 Kilauea Volcano 50 supercontinent 50 granite boulders 50 outcroppings 50 tropical jungles 50 rocky slopes 50 rock formations 50 Amazonian rainforest 50 lush valleys 50 snowy peaks 50 volcanic rock 50 dry riverbeds 50 tuffs 50 moraines 50 pebbly 49 hillocks 49 sheer cliffs 49 hydrothermal activity 49 deep ravines 49 landform 49 rock outcrop 49 hoodoos 49 Mineralization occurs 49 schists 49 igneous rock 49 grottos 49 calcareous 49 gulches 49 lahars 49 crags 49 seabeds 49 cascading waterfall 49 alpine lakes