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Sulfur Works

Lassen Volcanic National Park. Sept 3 - 6, 2004.

(top, down) Sulfur Works is thought to be the remains of Mount Tehama's central volcanic vent. It is in the middle of the Brokeoff-Diller-Pilot-Conard circle of peaks that are thought to define the flanks of ancient Mt Tehama (see map).

Bubbling mud pots

(top, down) Stinky hydrogen sulfide fumes were bubbling up from underground.

Geochemical and microbial activity

(top, down) Sulfur chemicals and microbial growths made colorful patches on the hillsides.

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bruce r. thomas. copyright © 2004. all rights reserved.