oceanic trench
Deep marine valley
An oceanic trench is a long, narrow depression in the ocean floor, typically the deepest parts of the sea.
Trenches form where tectonic plates collide and one plate slides beneath another.
The Mariana Trench in the Pacific, reaching nearly seven miles deep, is the deepest known point on Earth.
Scientists sent a probe to explore the oceanic trench.
Plate descending beneath another
- tectonicOf crustal forces
- plate boundaryWhere Earth's sections meet
- Challenger DeepDeepest known ocean location
- seafloorOcean's solid base
abyssal · lithosphere · crustal · bathymetry · seismic · rift · isostasy · fault line
Underwater exploration vehicle
- bathyscapheSelf-propelled deep-diving craft
- ROVPiloted-from-above underwater craft
- sonarUnderwater detection by echoes
- research vesselShip for scientific investigation
scientific expedition · Trieste · underwater drone · Alvin · acoustic imaging
Organism-generated light emission
- chemosynthesisEnergy from chemical reactions
- extremophilesOrganisms surviving extreme conditions
- giant squidLargest known invertebrate
- anglerfishBioluminescent deep-sea predator
tube worms · amphipods · sea cucumber · hydrothermal vents · benthic · detritivores
Beyond comprehension or measurement
- unexploredNot yet investigated
- unknownNot yet discovered
- hidden depthsUnexpected interior complexity
- alien landscapeForeign world's surface features
secrets · enigmatic · uncharted · forbidden zone · inaccessible · remote · terra incognita · cryptic
Having no brightness
- sunlessDevoid of daylight's star
- pitch-blackCompletely without light
- aphoticReceiving no light
- midnight zoneLightless deep-sea region
blackness · void · twilight zone · eyeless
subduction
Plate descending beneath another
- tectonicOf crustal forces
- plate boundaryWhere Earth's sections meet
- Challenger DeepDeepest known ocean location
seafloor · abyssal · lithosphere · crustal · bathymetry · seismic · rift · isostasy · fault line · accretionary wedge
submersible
Underwater exploration vehicle
- bathyscapheSelf-propelled deep-diving craft
- ROVPiloted-from-above underwater craft
- sonarUnderwater detection by echoes
research vessel · scientific expedition · Trieste · underwater drone · Alvin · acoustic imaging
bioluminescence
Organism-generated light emission
- chemosynthesisEnergy from chemical reactions
- extremophilesOrganisms surviving extreme conditions
- giant squidLargest known invertebrate
anglerfish · tube worms · amphipods · sea cucumber · hydrothermal vents · benthic · detritivores
unfathomable
Beyond comprehension or measurement
- unexploredNot yet investigated
- unknownNot yet discovered
- hidden depthsUnexpected interior complexity
alien landscape · secrets · enigmatic · uncharted · forbidden zone · inaccessible · remote · terra incognita · cryptic · otherworldly
lightless
Having no brightness
- sunlessDevoid of daylight's star
- pitch-blackCompletely without light
- aphoticReceiving no light
midnight zone · blackness · void · twilight zone · eyeless
- ocean depthsshallow, deep, abyss, deep sea, surface
- ocean habitatscoral reef, kelp forest, tide pools, intertidal zone, deep sea
- ocean trenchesChallenger Deep
- tectonicsplate tectonics, tectonic plates, tectonic plate, subduction, plate boundaries
- saline watersbrine, seawater, salt lake, Great Salt Lake, Dead Sea
- bathymetrydepth sounding, echo sounder, echosounder, fathom, depth chart
oceanic trenchmountain peak
Topmost point of elevation
mountain range · Mount Everest · Mauna Kea · summit · volcanic peak
ocean, oceans, trench, oceanic, trenches, entrenchment, trenched, oceanography, oceanographer