Aleutian Arc Plate Boundary Formed 56 Million Years Ago, Study Finds
An international research team has determined that the Aleutian Arc subduction zone, a critical plate boundary between Alaska and Kamchatka, began forming at least 56 million years ago. This finding significantly predates earlier models, which had assumed a more recent origin for the boundary where the Pacific Plate dives beneath the North American Plate. The research provides new insights into Earth's tectonic history and potential links to ancient global climate change.
A new study has revealed that one of Earth's most active and important plate boundaries, the Aleutian Arc subduction zone, is significantly older than previously understood.
Located within a chain of remote islands and underwater volcanoes stretching between Alaska and Kamchatka, this area is where the Pacific Plate converges and dives beneath the North American Plate.
An international research team has now shown that this subduction zone commenced at least 56 million years ago. This timeline is considerably earlier than previous models had estimated.
The findings, published in Nature Communications, shed new light on a major reorganization of plate motions across the planet. The study's results may also contribute to a better understanding of ancient global climate change.
According to Phys.org, the research uncovers a much older chapter in Earth's tectonic history.
