The Press Democrat reports
A strange-shaped, 3,300-foot-tall underwater volcano has been discovered just 184 miles off the Northern California coast.
The sea mountain, or “seamount,” appears more like a smooth-sided circular tower, with near-vertical sides, than a craggy mountain. It was found in February by an ocean mapping autonomous sailboat as part of a multi-agency survey led by the National Oceanic and Atmospheric Administration.
Read more at Strange-shaped sea mountain discovered off the coast of Northern California
Natural History Wanderings 
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