Geographer David: ash, Mount St Helens.
Geographer David: ash, Mount St Helens
Geographer David: Mount St Helens, 11 May 1980
Geographer David: Mount St Helens, June 1970
Geographer David: April 1977, Mount St Helens
Geographer David: Mount St Helens, April 1977
Geographer David: Timberline Parking Lot, Mount St Helens
Geographer David: Mount St Helens
Geographer David: Mount st Helens
Geographer David: Mount St Helens 12 April 1980
Geographer David: Mount St Helens, 26 April 1980
Geographer David: Mount St Helens, 17 May 1980
Geographer David: mp 30, Hwy 503, Mount st Helens
Geographer David: Smith Creek lahar, Mt St Helens
Geographer David: Mt Adams from Ape Canyon
Geographer David: Upper Smith Creek drainage, Mt St Helens panorama
Geographer David: the Lahar on the south-east side of the mountain
Geographer David: Smith Creek
Geographer David: Smith Creek
Geographer David: Spirit Lake, Mt St Helens panorama
Geographer David: Sheep Canyon trail, Mt St Helens
Geographer David: upper Sheep Canyon, Mt St Helens, WA
Geographer David: Mount St Helens from upper Ape Canyon trail
Geographer David: MSH abv Ape Canyn 113008
Geographer David: Sheep Canyon, Mt St Helens
Geographer David: Muddy River Lahar lower
Geographer David: Muddy River
Geographer David: Mount St Helens
Geographer David: Mount St Helens
Geographer David: Muddy River Lahar - upper, 2008