Laurentian Abyss

The Laurentian Abyss is an underwater depression off the eastern coast of Canada in the Atlantic Ocean. Not a trench, but more of an "underwater valley", it is estimated to be at most ~6,000 meters in depth. The Laurentian Abyss is a product of glaciation and water currents from the Saint Lawrence Seaway. The trench is the site of hydrothermal v..
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