Diamantina Deep named after her. Diamantina Deep The Diamantina Deep is located in the Diamantina Trench southwest of Perth, Western Australia. The Diamantina Trench is in the eastern part of the larger Diamantina Fracture Zone, which stretches from the Ninety East Ridge to the Naturaliste Plateau, off the lower part of Southwest Australia. It is one of the deepest points (surpassed by the Sunda Trench) in the Indian Ocean at . It is located about west-southwest of Perth at . A survey in 1961 by the Australian oceanographic survey ship confirmed the bathymetry and conducted a scientific survey. The trench (and the
Japan Trench within the Japan Trench consist mainly of highly localized clay-rich material. The subducting Pacific Plate creates basins along the ocean floor of the Japan Trench, accommodating the deposition of fine-grained turbidites and interseismic sediment deposits through turbidity currents. These turbidites preserve the sediment deposits as a geologic record of past large earthquakes by indicating the change in sediment deposition through sediment gravity flow. The small deep-sea basins with high sedimentation rates found along the Japan Trench fault line pose favorable environmental conditions for the studying of turbidite paleoseismology. During an exploration to the Japan Trench on January 1, 1999, a