UA has various meanings in the Governmental & Military category. Discover the full forms, definitions, and usage contexts of UA in Governmental & Military.
A volcano is an opening, or rupture, in the surface or crust of the Earth or a planetary mass object, which allows hot lava, volcanic ash and gases to escape from the magma chamber below the surface. On Earth, volcanoes are generally found where tectonic plates are diverging or converging.
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