Oceanic trenches are prominent, long, narrow topographic depressions of the ocean floor. They are typically 50 to 100 kilometers (30 to 60 … See more

Trenches were not clearly defined until the late 1940s and 1950s. The bathymetry of the ocean was poorly known prior to the Challenger expedition of 1872–1876, which took 492 … See more

As sediments are subducted at the bottom of trenches, much of their fluid content is expelled and moves back along the subduction … See more

• Allwrardt, Allan O. (1993). "Evolution of the tectogene concept, 1930–1965" (PDF). Proceedings of the Fifth International Congress on the History of Oceanography. Retrieved 29 September 2021.
• Amos, Jonathan (11 May 2021). "Oceans' extreme depths … See more

There are approximately 50,000 km (31,000 mi) of convergent plate margins worldwide. These are mostly located around the Pacific Ocean, but are also found in the eastern See more

Trenches seem positionally stable over time, but scientists believe that some trenches—particularly those associated with subduction zones where two oceanic plates … See more

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