It is The Marianas trench it is the deepest underwater canyon and i believe the longest at 1580 miles.The mid atlantic ridge stretches 10,000 miles!
It is known as a trench, which is the lower part of the ocean. The deepest trench is the Marina Trench.
It is known as a trench, which is the lower part of the ocean. The deepest trench is the Marina Trench.
The deepest canyons in the world are located in the Himalayas. The Yarlung Tsangpo Grand Canyon in Tibet is considered the deepest canyon on Earth, even deeper than the Grand Canyon in the United States. It reaches depths of over 17,000 feet in some places.
The Yarlung Tsangpo Grand Canyon in Tibet is often claimed to be the world's deepest canyon, with a depth of around 17,567 feet (5,382 meters). The Cotahuasi Canyon in Peru is another canyon that is also considered one of the world's deepest, with a depth of approximately 11,598 feet (3,535 meters).
The Cotahuasi Canyon of Peru is the world's deepest canyon The grand canyon is about 1737 meters deep - a little a mile. However the deepest canyon in the world is the Western CWM in Nepal on Mountain Everest where heat gets trapped and it gets so hot that the snow melts.
The Yarlung Tsangpo Grand Canyon is among the longest and deepest canyons in the world of Tibet.
Colca canyon in Peru is 10500 feet in depth
The deepest canyon on Venus is called Devana Chasma. It is classified as a rift zone formed by tectonic processes.
A deep ocean trench is a deep underwater canyon. It is found at the deepest parts of the ocean. It is long, thin, and has steep sides.
The deepest gorge in Idaho is called Hells Canyon. The canyon is part of Hells Canyon National Recreation Area, and is North America's deepest river gorge.
You are probably looking for "trench".