In geology or planetology, rocks, dust, gas, and other material thrown from a volcanic eruption or as a result of a bolide impact crater, or exploding star. Examples include lava bombs, tephra (pyroclastic material) (volcano), tektites (impact crater), and nebula (star).

In virch or computational environments, virtual and informational ejecta resulting from catastrophic collapse of a large simm or evolving digital structure.
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Development Notes
Text by M. Alan Kazlev
Initially published on 24 October 2001.