The Mariana Trench reaches roughly seven miles below the ocean surface.
Sources
- The Pacific Ocean—facts and information (nationalgeographic.com)
- https://www.ncei.noaa.gov/news/planet-postcard-mariana-trench (ncei.noaa.gov)
- https://ocean.si.edu/planet-ocean/seafloor/mariana-trench (ocean.si.edu)
- https://www.fisheries.noaa.gov/pacific-islands/habitat-conservation/mariana-trench-marine-national-monument (fisheries.noaa.gov)
- https://www.britannica.com/place/Mariana-Trench (britannica.com)
- https://www.scientificamerican.com/article/the-mariana-trench-is-7-miles-deep-whats-down-there/ (scientificamerican.com)
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