Wall Mountain Tuff

View of Wall Mtn Tuff
Barksdale Picnic Area


Park Paleontologist Herb Meyer
lecturing in front of the Wall Mtn Tuff at the Barksdale Picnic Area

 During the uplift of the ancestral Rocky Mountains during the late Paleozoic, most sediment deposited before that time was eroded. This formed deep valleys that by the Late Eocene allowed volcanic debris and sediments to be deposited. It was into these deep valleys that the Wall Mountain Tuff was deposited. The Wall Mountain Tuff was formed as the result of an enormous pyroclastic flow from a caldera near Mount Princeton, 50 miles west of Florissant around 37 million years ago. The landscape of the Florissant area was absolutely devastated following the eruption of the Wall Mountain Tuff.
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