What Is Medium Sized Tephra Called?

Answer

A medium sized Tephra is called a lapilli. They are rocks that come out of the top of a volcano when it erupts. lapilli is very beneficial to the environment.
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64mm.
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When a volcano erupts it will sometimes eject material such as rock fragments into the
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Medium -sized tephra.
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Lapilli. Source(s): http://en.wikipedia.org/wiki/Tephra.
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Tephra would be volcanic rock material that is ejected from the volcano. Tephra can be classified further, depending on their size. For example, large sized tephra ...
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