What is the significance of the Mount St. Helens eruption?

Mt. St. Helen’s Eruption

In 1980, Mt. St. Helens erupted, leaving behind a path of destruction.  A six-hundred foot layer of debris, consisting of 200 million cubic yards of volcanic ash and fragments of rock, was formed at the base of the mountain.  In 1982, a small eruption of water provided enough force to carve a 150-feet long canyon in these sedimentary layers.  The same flat contacts in-between the layers were observed, similar to those found in the Grand Canyon.  The canyon is measured to be 1/40th the size of the Grand Canyon.  It was formed in a single day, showing that the power of water is much greater than expected, and that it does not take millions of years to form a canyon (see the article about the formation of the Grand Canyon).  For more information about the Mt. St. Helens eruption, watch this video from Creation Today; and this one from Geologist Steve Austin

Rock Layers formed in a short time
Source: Answers in Genesis