Several nested craters are found at the summit of Santa Ana. Gases rise from fumaroles on the steep NE wall of an inner crater, within a roughly 900-m-wide crater. The 80-m-high crater walls expose tephra layers from phreatomagmatic eruptions. The walls of the two outer craters, which open towards the SW, are at the upper right.

Photo by Lee Siebert, 2002 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Galleries: Craters

Keywords: crater | vent | sulfur | gas plume | emissions | gas | stratigraphy | outcrop | geology | tephra

Santa Ana