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Noun- Solid material ejected into the air during a volcanic eruption.

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Usage examples (37)
  • The volcano ejected a minimum of 1.1 km3 of uncompacted tephra, which is equivalent to 0. 20-0.25 km3 of magma or solid rock.
  • The type of dust that attracted the engineers to Hawaii is called "tephra," a fine, powder-like material that is ejected during a volcanic eruption.
  • tephra F is the most prominent and best-dated tephra.
  • Volcanic tephra are widespread in northern Ecuador, but hard to find in southern Ecuador.
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