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Sidescan sonar record off so. Alaska

By Pacific Coastal and Marine Science Center 2015 (approx.)
Computer application screen showing seafloor features, depth on left, a volcano-like cone sticking up in middle with plume.
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Detailed Description

Profile of newly discovered volcano-like cone in sonar record collected off southern Alaska. The cone’s summit is at about 1,000 meters water depth. Note fluid plume (blue) rising more than 700 meters upward from the summit.

Sources/Usage

Public Domain.