Cratères d'Inyo sont un champ long de 12 km de dômes de lave à la bordure orientale de la Sierra Nevada, en Californie, près de la ville de mammouth et au sud du champ des cratères de Mono similaire. Le champ contient siliceuse 6 dômes de lave, coulées de lave et 15 cratères d'explosion (maars) qui la dernière éruption remonte à il y a environ 600 ans.
The Inyo Craters overly the NW rim and parts of the floor of the older Long Valley caldera, but belong to a different volcanic system - they were fed by a different magma chamber.
Explosion craters of Mammoth Mountain volcano to the south are believed to belong to the Inyo Craters as well. Wilson Butte erupted about 1350-1200 years ago and produced pyroclastic flows which extended 9 km and covered 60 km2.
The latest eruptions at Inyo Craters about about 600 years ago were explosive eruptions that formed the prominent South Deadman
, Obsidian Flow
, and Glass Creek
rhyolitic lava domes and lava flows. The Inyo Crater Lakes are small phreatic craters that formed during this eruption on the south flank of the older Deer Mountain rhyolite dome of the Long Valley caldera.
Source: GVP, Inyo Craters information