050e85d3-d6c8-4373-aebc-c814b10492db urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-23T10:15:27 creation ISO 19115 2016 Australian Antarctic Southern Ocean Profiling Project 050e85d3-d6c8-4373-aebc-c814b10492db Metadata record for data from ASAC Project 1119 See the link below for public details on this project. A marked bend in the Hawaiian-Emperor seamount chain supposedly resulted from a recent major reorganization of the plate-mantle system there 50 million years ago. Although alternative mantle-driven and plate-shifting hypotheses have been proposed, no contemporaneous circum-Pacific plate events have been identified. We report reconstructions for Australia and Antarctica that reveal a major plate reorganization between 50 and 53 million years ago. Revised Pacific Ocean sea-floor reconstructions suggest that subduction of the Pacific-Izanagi spreading ridge and subsequent Marianas/Tonga-Kermadec subduction initiation may have been the ultimate causes of these events. Thus, these plate reconstructions solve long-standing continental fit problems and improve constraints on the motion between East and West Antarctica and global plate circuit closure. {"type": "Polygon", "coordinates": [[[62.0, -70.0], [159.0, -70.0], [159.0, -54.0], [62.0, -54.0], [62.0, -70.0]]]} 62.0 159.0 -70.0 -54.0 AMD AMD/AU CEOS EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN Plates PROJECT HOME PAGE documentDigital Public information for ASAC project 1119 HTML VIEW RELATED INFORMATION documentDigital View a copy of the referenced publication. HTML VIEW RELATED INFORMATION documentDigital Citation reference for this metadata record and dataset HTML Creative Commons by Attribution logo documentDigital PNG