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20171221-usga-lava-flow-02

A close up of the ‘a‘ā flow texture, showing the fluid, incandescent interior as well as the rubbly clinker. Photo taken Thursday, December 21, 2017 courtesy of U.S. Geological Survey

A close up of the ‘a‘ā flow texture, showing the fluid, incandescent interior as well as the rubbly clinker. Photo taken Thursday, December 21, 2017 courtesy of U.S. Geological Survey

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