Macroscopic Solutions:
Vesicular Basalt Ah-ha
Macroscopic Solutions:
Tephra
Macroscopic Solutions:
Tephra
Macroscopic Solutions:
Tephra and sulfur
Macroscopic Solutions:
Solidified sulfur flow with tephra
Macroscopic Solutions:
"Popcorn" tephra
Macroscopic Solutions:
Tongariro National Park, New Zealand.
Macroscopic Solutions:
Black scoria. Rangitoto Island, New Zealand.
Macroscopic Solutions:
Red scoria. Rangitoto Island, New Zealand.