deep trenches
Profound subterranean furrows
Deep trenches are long, narrow excavations cut far into the ground or ocean floor.
In geology, oceanic deep trenches are the deepest parts of the sea, formed where tectonic plates converge: the Mariana Trench plunges nearly seven miles down.
On land, deep trenches may be dug for foundations, pipelines, or military fortifications.
Figuratively, the phrase suggests entrenched positions difficult to escape: The negotiations stalled with both sides in deep trenches.
- abyssImmeasurably profound depth
- chasmDeep, steep-sided gap
- oceanMassive saltwater body
- MarianaName for deepest waters
- ocean floorUnderwater continental surface
submarine · fathoms · darkness · pitch black · pressure · crushing · gorge · seafloor · crevasse · excavation · warfare · mud · soldiers · digging · no man's land · ravine · abyssal · plunging
- Atlantic OceanNorth Atlantic, South Atlantic, Gulf Stream, Bermuda Triangle, Sargasso Sea
- Ocean MysteriesBermuda Triangle, ghost ships, shipwrecks, lost treasure, sea monsters
- oceanographyoceanography, oceanographer, sonar, marine science, ocean circulation
- Pacific mapsisland maps, coral atolls, nautical maps, nautical charts, marine charts
- Sea of Cortezvaquita, California sea lion, whale shark, gray whale, blue whale
- hidden placesunderwater caves, sea caves, cenotes, underground rivers, caverns
deep trenchesmountain ranges
Extended series of peaks
mesas · highlands · buttes · high ground · steep cliffs
deep trenchesembankments
Raised earth structures
levees · dikes · mounds · cordilleras · level ground
deep trencheslevel ground
smooth surfaces · prairies · flatlands · plateaus · gentle slopes
deep, trench, deeply, deepen, deepened, deepening, deepness, deeper, deepest