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U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
About 750,000 years ago, volcanic eruptions produced a hot molten lava flow that filled this valley hundreds of feet deep with basaltic rock. Watson Creek spills over the northern edge of this flow to form Watson Falls.
Public Domain. Photo courtesy of Gregg Morgan of BLM
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