Natrocarbonatite
Ol Doinyo Lengai, Ngorongoro District, Arusha region, Tanzania
A broken surface approximately parallel to flow direction, of a lobe of natrocarbonatite lava. The sample was collected as a freshly erupted liquid by Charles Milton in 1963 (my number CML-9). At that time, the vent was nearly filled with natrocarbonatite lava flows; in 1966, the vent was cleared by an explosive eruption that included blocks of © Tony Peterson
Natrocarbonatite
Ol Doinyo Lengai, Ngorongoro District, Arusha region, Tanzania
The upper surface of a natrocarbonatite lava flow, direction right to left. The sample was collected as recently erupted (but not flowing) by Charles Milton in 1963. At that time, the vent was nearly filled with natrocarbonatite lava flows; in 1966, the vent was cleared by an explosive eruption that included blocks of © Tony Peterson