PROF. STEWART LOWTHER / SCIENCE PHOTO LIBRARY. PROF. STEWART LOWTHER / SCIENCE PHOTO LIBRARY.
Plinian column of ash, hot gases & pulverised rock shooting out of Mt. St. Helens volcano, Washington State, USA, during the second eruption on 22nd July 1980, two months after the first major blast of May 18th. Deep dendritic gullies, caused by pyroclastic flow, (a thick soup of hot gas & ash spilling over the brim of the volcano, or mudflows from glacial melt) trace their way down the mountainside. Mt. St. Helens forms part of the Cascade Range, an almost unbroken chain of geologically young volcanoes, running from southern British Columbia, Canada, to northern California, USA.
Model release not required. Property release not required.