The central cone of Longonot volcano is truncated by a small steep-walled caldera that is 1.8-km wide. Erosionally furrowed ash deposits related to the caldera-forming eruptions mantle its slopes. Trachytic lava flows up to 30-m thick that built the central cone can be seen in the far west caldera wall. The caldera floor is covered by post-collapse aa lava flows . A line of small craters extends from the SW wall to the center.

Copyrighted photo by Katia and Maurice Krafft, 1976.

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Longonot