Mount St. Helens

When radioisotope dating is applied to rocks of known age, such as the Mt St Helens lava dome formed in the 1980s, it fails miserably.

How the Mount St Helens eruption caused a radical rethink of previously long-held, long-age views of the world.

In the years after the Mt St Helens eruption of 18 May 1980, scientists discovered that the initial pessimistic forecasts of long-term barrenness were wrong, as vegetation and wildlife soon returned.