adventurous-watermelon: Geologic heroin at the Pallisades of John Day Fossil Beds Nat'l Monument, Clarno Unit, OR. A volcanic complex to the south produced prodigious ash fall and tuffs. Over time these slid away in lahars or welded into ignimbrite.
tags:
original: https://www.tumblr.com/blog/view/matiasywea/163075085521