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Io's great volcanic activity indicates a young age (Talk.Origins)
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- Jupiter's moon Io is volcanic. It is too small for its volcanism to be explained by residual heat of formation or radioactive decay, unless the moon is not millions of years old.
Source: Pathlights, n.d. The age of the earth.
CreationWiki response: Creation Wiki has no disagreement on this point with Talk Origins. They are using a poor source.
Io does raise an interesting question that needs to be studied. Much of Io's volcanic material is ejected into space with a velocity in excess of Io's escape velocity, as a result it is lost to Io forever. The question is, given Io's size and mass could it have originally contained enough material to support its observed rate of eruption for 4.6 billion years?