Diapirs or salt domes on the seafloor.
Image courtesy of Lophelia II 2010 Expedition, NOAA-OER/BOEM. Download image (jpg, 51 KB).

At diapirs or salt domes, sometimes the salt itself actually reaches the seafloor where it dissolves, occasionally filling lows in the seafloor with super-saturated, very dense salty waters known as brines. We may dive on one of these brine pools during Leg 3.

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