The Puysegur Trench is a deep underwater geological formation located in the southwest Pacific Ocean, to the south of New Zealand's South Island. It is part of the boundary between the Pacific Plate and the Indo-Australian Plate. The trench is significant for its geological activity, including earthquakes and volcanic activity, as these tectonic plates interact. The Puysegur Trench is one of many subduction zones around the world, where one tectonic plate is being forced below another.
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