Ecological Responses to the 1980 Eruption of Mount St. Helens - Virginia H. Dale, Frederick J. Swanson, Charles M. Crisafulli - Google Books

http://books.google.de/books?id=ZNOlAhK3DuAC&pg=PA227&lpg=PA227&dq=mount+st.+helens+%22pumice+plain%22+%22pocket+gopher%22+lupin

The eruption of Mount St. Helens on May 18, 1980, had a momentous impact on the fungal, plant, animal, and human life from the mountain to the far reaches of the explosion's ash cloud and mudflows. Although this intense natural event caused loss of…