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![An outcrop rising from the flat - how big is it actually? what is the whitematerial? is this a remnant of a once continuous bed? a boulder that has beencovered with clastic material making it look like a mini-mesa? What is thewhite layer? 5900 meters depth on the flank of the Mariana Trench expn8400.jpg An outcrop rising from the flat - how big is it actually? what is the whitematerial? is this a remnant of a once continuous bed? a boulder that has beencovered with clastic material making it look like a mini-mesa? What is thewhite layer? 5900 meters depth on the flank of the Mariana Trench](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_expn8400.jpg?itok=WSd84reh)
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An outcrop rising from the flat - how big is it actually? what is the whitematerial? is this a remnant of a once continuous bed? a boulder that has beencovered with clastic material making it look like a mini-mesa? What is thewhite layer? 5900 meters depth on the flank of the Mariana Trench. (Image credit: NOAA/OAR/OER, 2016 Deepwater Exploration of the Marianas, Leg 3.)