Article · Wikipedia archive · Last revised Jul 15, 2026

Cato Trough

The Cato Trough or Chesterfield Trough is an oceanic trough in the Coral Sea of the South Pacific Ocean. It separates the continental crust of Australia and Zealandia to within 25 km (16 mi) and has a depth of 3,600 m (11,800 ft). The trough is underlain by oceanic crust, having formed as a result of seafloor spreading from about 63 to 50 million years ago.

Last revised
Jul 15, 2026
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The Cato Trough or Chesterfield Trough is an oceanic trough in the Coral Sea of the South Pacific Ocean. It separates the continental crust of Australia and Zealandia to within 25 km (16 mi) and has a depth of 3,600 m (11,800 ft).1 The trough is underlain by oceanic crust, having formed as a result of seafloor spreading from about 63 to 50 million years ago.12

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23°10′S 155°0′E / 23.167°S 155.000°E / -23.167; 155.000