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
Diamantina, Minas Gerais Diamantina, Minas Gerais Diamantina () is a Brazilian municipality in the state of Minas Gerais. Its estimated population in 2006 was 44,746 in a total area of 3,870 km². "Arraial do Tijuco" (as Diamantina was first called) was built during the colonial era in the early 18th century. As its name suggests, Diamantina was a center of diamond mining in the 18th and 19th centuries. A well-preserved example of Brazilian Baroque architecture, Diamantina is a UNESCO World Heritage Site. Other historical cities in Minas Gerais are Ouro Preto, Mariana, Tiradentes, Congonhas and Sabará. Diamantina is a statistical micro-region that includes