Tethyan Trench Tethyan Trench The Tethyan Trench was an ancient oceanic trench that existed in the northern part of the Tethys Ocean during the middle Mesozoic to early Cenozoic eras. The Tethyan Trench formed when the Cimmerian Plate was subducting under eastern Laurasia, around 200 million years ago, in the Early Jurassic. The Tethyan Trench extended at its greatest during Late Cretaceous to Paleocene, from what is now Greece to the Western Pacific Ocean. Subduction at the Tethyan Trench probably caused the continents Africa and India to move towards Eurasia, which resulted in the opening of the Indian Ocean. When the Arabian
HMAS Diamantina (M 86) of RAN ships since the Australian Bicentenary in 1988. The minehunter was one of the thirteen ships involved in the ceremonial entry through Sydney Heads, and anchored in the harbour for the review. In October 2013, "Diamantina" participated in the International Fleet Review 2013 in Sydney. HMAS Diamantina (M 86) HMAS "Diamantina" (M 86), named after the Diamantina River, is a "Huon"-class minehunter currently serving in the Royal Australian Navy (RAN). Built by a joint partnership between Australian Defence Industries (ADI) and Intermarine SpA, "Diamantina" was constructed at ADI's Newcastle shipyard, and entered service in 2000. In 1993, the Department