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Photographs by USGS
photo and caption credit
U.S. Department of Interior, U.S. Geological Survey
Mid-afternoon views of a 3-m-high hornito that has developed near one of the breakout points between 2300 and 2240 feet. A hornito is a conical mound of spatter above a rootless vent--in this case, a break in the roof of a lava tube. A hornito is hollow but often roofed. Commonly, lava can be observed, through a hole in the side or roof of the hornito, to be actively spattering. In this large close-up, note how the spatter has slopped out of the top and run a short distance down the mound.
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