Ammen Rock.

PositionCashes Ledge range - Brief article

Ammen Rock is the highest peak in the Cashes Ledge range. Rising steeply off the ocean floor from 460 feet below to within 40 feet of the ocean's surface, Ammen Rock, like a rock in a river, disrupts the strong ocean currents, sending streams of swirling water across the underwater mountain. This unusual phenomenon produces-internal waves" that create ideal conditions for extraordinarily high production of algae and phytoplankton-the foundation of the marine food web. Created 13,000 years ago...

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