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1981 eruption as witnessed from inside of crater
1. 1981 eruption as witnessed from inside of crater
Ash flowing down reservoirs at Mount St. Helens
2. Ash flowing down reservoirs at Mount St. Helens
Backpack and workers by the dome
3. Backpack and workers by the dome
Backpack sampler next to high temperature vents with white volcanic deposits visible/present
4. Backpack sampler next to high temperature vents with white volcanic deposits visible/present

Bill Rose looking at sulfur on lava boulder
5. Bill Rose looking at sulfur on lava boulder
Blue MoS2 found on rock
6. Blue MoS2 found on rock
Boulders rolling down inside crater
7. Boulders rolling down inside crater
Clean up of wood debris around edge of Spirit Lake
8. Clean up of wood debris around edge of Spirit Lake

Close up of large douglas fir trees
9. Close up of large douglas fir trees
Close up of volcanic collection of volcanic salts in front of crater
10. Close up of volcanic collection of volcanic salts in front of crater
Close up of volcanic salts as they are being collected
11. Close up of volcanic salts as they are being collected
Collecting ash from the bottom of Weyerhaeuser truck
12. Collecting ash from the bottom of Weyerhaeuser truck

Collection of condensed volcanic gases in front of crater
13. Collection of condensed volcanic gases in front of crater
Contrast between areas destroyed by blast and trees that survived
14. Contrast between areas destroyed by blast and trees that survived
Crater floor
15. Crater floor
Crater in front of Mount St. Helens crater
16. Crater in front of Mount St. Helens crater

Crater of Mount St. Helens showing the 300 plus foot dome in center
17. Crater of Mount St. Helens showing the 300 plus foot dome in center
Cryogenic backpack portable sampling system
18. Cryogenic backpack portable sampling system
Crystal and sulfur deposits at mouth
19. Crystal and sulfur deposits at mouth
Dave Anderson and Bill Zoller preparing to sample
20. Dave Anderson and Bill Zoller preparing to sample
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