1. Maps showing posteruption erosion, deposition, and dome growth in Mount St. Helens Crater, Washington, determined by a geographic information system Yale Public content 1992. 2002-06-01T04:00:00Z. 2021-02-12T15:32:15Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Saint Helens, Mount (Wash.).