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20180829-usgs-lerz-01

Void spaces within the cooled lava channel and along the channel margins create hazardous conditions on the fissure 8 flow field. Here, part of the void is visible, but a fragile veneer of lava hides other parts of it (upper right). Photo taken Wednesday, August 29, 2018 courtesy of U.S. Geological Survey

Void spaces within the cooled lava channel and along the channel margins create hazardous conditions on the fissure 8 flow field. Here, part of the void is visible, but a fragile veneer of lava hides other parts of it (upper right). Photo taken Wednesday, August 29, 2018 courtesy of U.S. Geological Survey

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