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ID. Mount St. Helens - PP 1250 4cp

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Steam-blast eruption from summit crater of Mount St. Helens, aerial view looking southwest, showing a roiling, gray-brown, ash-laden cloud that envelops and almost completely hides an initial fingerlike ash column and an upper white cloud formed by atmospheric condensation of water vapor in the convectively rising top of the eruptive column. Photo by James G. Moore. Skamania County, Washington. April 6, 1980. Figure 9, U.S. Geological Survey Professional paper 1250.

Steam-blast eruption from summit crater of Mount St. Helens, aerial view looking southwest, showing a roiling, gray-brown, ash-laden cloud that envelops and almost completely hides an initial fingerlike ash column and an upper white cloud formed by atmospheric condensation of water vapor in the convectively rising top of the eruptive column. Photo by James G. Moore. Skamania County, Washington. April 6, 1980. Figure 9, U.S. Geological Survey Professional paper 1250.

Image file: /htmllib/btch164/btch164j/btch164z/mcpp0004.jpg
   

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