Pyroclastic flow zone

Previous | Home | Next

The pyroclastic flow created a barren pumice plain. The pyroclastic flow spread over 6 square miles immediately north of the volcano, which was part of the area already buried by the debris avalanche deposit. Gravel and cobble-size pumice spread out in a fan-shaped flow up to 131 feet thick, creating a barren plain of pumice. No remnants of the former forest remained.

Pyroclastic flow zone.