Annotated record of the detailed examination of Mn deposits from the Capricorn Seamount, Southwest Pacific Ocean

Sediments dredged from the flat top of Capricorn Seamount on the eastern edge of the Tonga Trench show it to be of probable Miocene Age. Tonga Trench is judged to be early or pre-Miocene in age. Submergence, ascribed to accommodation of the crustal layer under the superposed load, has been followed by two episodes of erosion, probably in the Pleistocene, In these features and in its depth and age it exhibits a rough agreement with North Pacific seamounts.