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Biscuit Basin

Sapphire Pool steams in Biscuit Basin, three miles north of Old Faithful.

Sapphire Pool

Three miles north of Old Faithful is Biscuit Basin, named for the unusual biscuit-like deposits formerly surrounding Sapphire Pool. Following the 1959 Hebgen Lake earthquake, Sapphire erupted, and the "biscuits" were blown away. Other notable colorful features in the basin are Jewel Geyser, Shell Geyser, Avoca Spring, and Mustard Spring.

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