The trachytic Longonot stratovolcano SE of Lake Naivasha contains an 8 x 12 km caldera. A large central cone, seen here from the SW, was constructed within the caldera and forms the summit of the volcano. It is truncated by a circular, 1.8-km-wide caldera. Post-caldera lavas erupted onto its floor give it a flat surface. Masai tradition records a lava flow on the northern flank during the 19th century. Similarly youthful-looking lava flows occur on the SW flank.

Copyrighted photo by Katia and Maurice Krafft, 1976.

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

Longonot