Pyroclastic flow deposits from the 15 April (lower 2/3 of section) and 21 April (upper 1/3 of section), 1990 eruptions of Redoubt in Alaska are exposed in a gully. The shovel at the base of the section provides scale. The larger 15 April pyroclastic flow carried large blocky fragments of a lava dome that had been growing in the summit crater.

Photo by Christina Neal, 1990 (Alaska Volcano Observatory, U.S. Geological Survey).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Volcanic Outcrops | Pyroclastic Flows

Keywords: deposit | outcrop | pyroclastic flow | pyroclastic density current (PDC) | geology | stratigraphy | dome collapse | block-and-ash flow | ash | tephra | block

Redoubt