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Sulfur Springs area - Mud Volcano area
Sulfur
Oil stained sulfur crystals - Mineral deposits
Sulfur
Sulfur crystals - Mirror Plateau - Mineral deposits
Sulfur
Sulfur-lined pool - Hot Springs, Norris Geyser Basin
Sulfur
Small spring in Sulfur Springs area - Hot Springs, Mud Volcano area
Sulfur
Jets of sulfur shooting out from holes in the sediment-covered seafloo...
Sulfur
Sulfur-rich layer coating lava ash at Volcano O.
Sulfur
Sulfur deposited on the cone flanks and surrounding areas gives the ap...
Sulfur
Sulfur? iron oxide? orange bacteria? what is this covering?
Sulfur
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