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Mon, July 06

A Violent Past
A brief history of the Verde Valley volcanoes

Known locally as the Tee Pee rocks, the Cottonwood Basin Fumaroles are the result of volcanic ash falling on what was once a freshwater lake that covered the Verde Valley. The steam mixed from the lake&#65533;s calcium-carbonate-rich water deposited calcite into the ash, forming a cement-like shell around the vents that were exposed when surrounding lake sediments eroded. VVN/Steve Ayers<br/>

Known locally as the Tee Pee rocks, the Cottonwood Basin Fumaroles are the result of volcanic ash falling on what was once a freshwater lake that covered the Verde Valley. The steam mixed from the lake&#65533;s calcium-carbonate-rich water deposited calcite into the ash, forming a cement-like shell around the vents that were exposed when surrounding lake sediments eroded. VVN/Steve Ayers<br/>

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