[{"n": "Fumarole", "u": "/e/volcanology/fumarole/", "s": "Volcanic vents that emit steam and gases, occasionally with small amounts of liquid or fine solid particles."}, {"n": "Hot spring", "u": "/e/volcanology/hot-spring/", "s": "A spring produced by geothermally heated groundwater."}, {"n": "Lava dome", "u": "/e/volcanology/lava-dome/", "s": "Mound-shaped volcanic protrusions from slow extrusion of viscous lava."}, {"n": "Lava field", "u": "/e/volcanology/lava-field/", "s": "A large, mostly flat area of lava flows, typically composed of highly fluid basalt."}, {"n": "Maar", "u": "/e/volcanology/maar/", "s": "A volcanic crater formed by groundwater-magma explosions, often becoming a lake."}, {"n": "Magma chamber", "u": "/e/volcanology/magma-chamber/", "s": "Large pool of liquid rock beneath Earth's surface."}, {"n": "Pyroclastic flow", "u": "/e/volcanology/pyroclastic-flow/", "s": "Fast-moving current of hot gas and volcanic matter."}, {"n": "Shield volcano", "u": "/e/volcanology/shield-volcano/", "s": "Broad, gently sloping volcanoes built by fluid lava flows."}, {"n": "Stratovolcano", "u": "/e/volcanology/stratovolcano/", "s": "Steep, explosive volcanoes built from alternating lava and tephra layers"}, {"n": "Submarine volcano", "u": "/e/volcanology/submarine-volcano/", "s": "Underwater vents where magma erupts, shaping seafloor and ecosystems."}, {"n": "Supervolcano", "u": "/e/volcanology/supervolcano/", "s": "A volcano with a VEI-8 eruption exceeding 1,000 cubic kilometers."}, {"n": "Volcanic arc", "u": "/e/volcanology/volcanic-arc/", "s": "Belt of volcanoes formed above a subducting oceanic tectonic plate."}, {"n": "Volcanic cone", "u": "/e/volcanology/volcanic-cone/", "s": "Volcanic cones are simple landforms built by ejected material around a vent."}, {"n": "Volcanic island", "u": "/e/volcanology/volcanic-island/", "s": "Volcanic islands are high islands of volcanic origin."}, {"n": "Volcanic plug", "u": "/e/volcanology/volcanic-plug/", "s": "A volcanic plug is magma hardened in a volcano's vent."}, {"n": "Volcanism", "u": "/e/volcanology/volcanism/", "s": "Eruption of molten material from a planet or moon's interior."}, {"n": "Volcanology", "u": "/e/volcanology/volcanology/", "s": "Study of volcanoes, lava, magma, and related phenomena."}, {"n": "Subduction", "u": "/e/volcanology/subduction/", "s": "Subduction recycles lithosphere into the mantle, driving plate tectonics."}]