deep trench
Long narrow gorge
A deep trench is an elongated excavation or natural depression extending far below the surrounding surface.
In geology, deep trenches are the deepest parts of the ocean floor, formed where tectonic plates converge: the Mariana Trench.
In military contexts, deep trenches provide protection from enemy fire.
The phrase often emphasizes extreme depth: They dug a deep trench for the foundation.
- ditchShallow excavated channel
- excavationAct of unearthing
- gorgeDeep, narrow valley
- chasmDeep, steep-sided gap
- ravineDeep, narrow valley
abyss · canyon · furrow · gully · warfare · bunker · muddy · dugout · foxhole · ocean · ocean floor · submarine · fathom · darkness · six feet under · shovel · digging in · dig
- deep seaabyss, seabed, ocean floor, seafloor, anglerfish