In between the Osbourn Trough is divided into three segments separated by dextral offsets. Near the Tonga Trench the bathymetry of these structures is affected by the rotation of the Pacific plate.

Capricorn Seamount

The Capricorn Seamount is a guyot located on the eastern wall of the northern Tonga Trench (see map above). It is a large guyot, wide at its base with a small part of its reefal or lagoonal summit reaching below sea level. The bending of the Pacific plate at the Tonga Trench is

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