How are volcanoes formed?
Mrs. Jackson's Science Class
Hi Mrs. Jackson's class,
Volcanoes are formed when magma from within the Earth's upper mantle works
its way to the surface. At the surface it erupts to form lava flows and
ash deposits. Ash deposits result from more explosive activity and lava
flows usually are associated with quieter activity. Anyway, once you have
piled up lava and/or ash around the vent, you have a young volcano. After
many many more eruptions you have a big volcano that is constructed of the
ash and lava products of these eruptions.
I hope this answers your question.
Sincerely,
Scott Rowland
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