Chasha crater, Tolmachev Dol 




Chasha ("Chalice") crater filled with a lake is in the middle of the photo. It formed about 4600 14C years BP and produced about 1 km3 of rhyolitic tephra (marker ash layer OPtr). Chasha crater is located in the northern part of the Tolmachev Dol (Plateau) and surrounded by Holocene basaltic cinder cones. Next lake at the left was dammed by the Chasha eruption products. The most distant water at the left is Tolmachevo Lake; Tolmacheva river valley is between Chasha lake and distant cones at the right. 


Return To Feature