Oceanic trench the level of the surrounding oceanic floor. The greatest ocean depth measured is in the Challenger Deep of the Mariana Trench, at a depth of below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km/yr. There are approximately of convergent plate margins, mostly around the Pacific Ocean—the reason for the reference “Pacific-type” margin—but they are also in the eastern Indian Ocean, with relatively short convergent margin segments in the Atlantic Ocean and in the Mediterranean Sea. Globally, there are over 50 major ocean trenches covering an area of 1.9 million km or about 0.5%
Trench Green Trench Green Trench Green is a hamlet in Oxfordshire about northeast of the village of Mapledurham and about northwest of Reading in neighbouring Berkshire. It is situated on the rural road from Caversham to Goring Heath and Goring-on-Thames, at its junction with the access lane to Mapledurham village. For local government purposes Trench Green is in Mapledurham civil parish, which forms part of the district of South Oxfordshire within the county of Oxfordshire. It is within the Henley constituency of the United Kingdom Parliament, and the South East England constituency of the European Parliament. Although barely more than a few