Because of the 1980 and 1982 Mount St. Helens eruptions, scientists know that sedimentary rock layers and steep-walled canyons can form in only hours rather than millions of years.
*Posters ship separately if ordered with other items.
|Title:||Mount St. Helens|
|Dimensions:||24 x 18 inches|
|Total Shipping Weight:||8 oz.|
Please double check your facts. Mount St Helens erupted on May 18, 1980. I should know, I was there. Sadly, this puts all your other research and dates in question.
We have corrected the item summary on our website. We have made the appropriate corrections to the listing. God Bless!
-ICR Customer Service Team