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Monday, May 18, 2015
Base of Mount St. Helens' Eruptive Column and Crater Rim
From USGS Volcanoes:
Base of Mount St. Helens' eruptive column and crater rim, cauliflower effect in column, May 18, 1980, 12:35 PM. USGS image by T. Casadevall. Tags: #volcano#mountsthelens#washingtonstate
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