With the 30th anniversary of the 1980 eruption coming up tomorrow, why not a pre-eruption map? The below is the 1919 Mt St Helens quadrangle. Be sure to click on the image for a zoomable version of the map.
U.S. Geological Survey. 1919. Mount St Helens quadrangle, Washington 1:125,000. United States Department of the Interior, USGS. Hosted by University of Washington.
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