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crater


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A circular depression around the vent of a volcano. Craters form the summit of most volcanoes. They occur where lava overflows and hardens or where the walls collapse as the magma sinks down the vent after an eruption. Funnel-shaped craters are typical of stratovolcanoes, while kettle-shaped craters are characteristic of shield volcanoes.

Subjects: Earth Sciences and Geography — Astronomy and Astrophysics.


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