Global Volcanism Program | Image GVP-00065
Fossa volcano, seen here from the small cone of Vulcanello to its north, is a 390-m-high tuff cone capped by a 500-m-wide crater. Like tuff rings, tuff cones form as a result of explosive eruptions involving water-magma interaction, but can be less violent, allowing volcanic ejecta to accumulate around the vent, thus forming smaller diameter, steep-sided cones.
Copyrighted photo by Katia and Maurice Krafft.
Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.