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![An outcrop of white rock, possibly a carbonate or serpentinite mud flow, cappedby darker polymict (meaning many rock types) and loosely consolidatedformation of what appears to be serpentinite mud with numerous pebble to cobblesized rocks embedded in it expn8406.jpg An outcrop of white rock, possibly a carbonate or serpentinite mud flow, cappedby darker polymict (meaning many rock types) and loosely consolidatedformation of what appears to be serpentinite mud with numerous pebble to cobblesized rocks embedded in it](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_expn8406.jpg?itok=FzyU5Tz5)
Description
An outcrop of white rock, possibly a carbonate or serpentinite mud flow, cappedby darker polymict (meaning many rock types) and loosely consolidatedformation of what appears to be serpentinite mud with numerous pebble to cobblesized rocks embedded in it. (Image credit: NOAA/OAR/OER, 2016 Deepwater Exploration of the Marianas, Leg 3.)