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Mi-STAR 7.2 L1
plate tectonics and volcanoes
| Term | Definition |
|---|---|
| eruption | the emission of volcanic products such as lava, ash, and gasses from a volcano; as a geologic process, volcanic eruptions usually occur as sudden events, can be explosive or nonexplosive |
| stratovolcano | a steep-sided, often cone-shaped volcanic peak, formed by layers of ash, relatively sticky lava and other eruption products. |
| shield volcano | a broad, dome-shaped volcano with gently sloping sides formed by layers of relatively fluid lava. |
| fissure vent | A linear crack, usually at the bottom of the ocean, through which lava erupts. |
| caldera | A very wide crater, formed by the collapse of the top of a volcano after a very big eruption. |