Lava pillars and collapse areas
seafloor photo showing lava pillars
Lava pillars in the middle of a collapsed part of a submarine lava flow.
Submarine lava flows often have areas of collapse in the middle of the flows. At the edges of collapsed areas "lava pillars" are often present. If you see lava pillars on your bottom traverse with ROPOS, you know you are in the middle of a collapsed lava flow.
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