Mariana Trench

Assembled from 29 blocks · 2 evidence · 19 related

1. Story
2. A crescent-shaped subduction trench in the western Pacific, east and south of the Mariana Islands, formed where the Pacific Plate is subducted beneath the smaller Mariana Plate. Commonly reported as roughly 2,550 km long and about 69 km wide. Because it is an arc thousands of kilometres long, no single coordinate represents it; the point given here is an indicative centroid near the southern end and must not be read as the trench's position.
3. Knowledge
4. Abyssopelagic Zone (Abyssal Zone)
5. Hadal Zone
6. Mariana Trench
7. Connections
8. Abyssopelagic Zone (Abyssal Zone)
9. Hadal Zone
10. Challenger Deep
11. HMS Challenger sounds the deep that will bear her name
12. Multibeam survey reports a 10,984 m maximum sounding
13. So, How Deep Is the Mariana Trench? asks the question in print
14. Bathypelagic Zone (Midnight Zone)
15. Hadal Zone
16. Mariana Trench
17. Marine Snow
18. Abyssopelagic Zone (Abyssal Zone)
19. Mariana Trench
20. Challenger Deep
21. DSV Limiting Factor (Triton 36000/2)
22. Trieste reaches the bottom of the Challenger Deep
23. JAMSTEC's Kaiko reaches the Challenger Deep floor
24. First solo crewed dive to the Challenger Deep
25. Five Deeps Expedition dives the Challenger Deep four times
26. Revised depth of the Challenger Deep published
27. Evidence
28. Post-2000 published maximum depths for the Challenger Deep, and the geodetic positions assigned to them, disagree by more than the accompanying stated uncertainties. A 2010 multibeam survey recorded a deepest sounding of 10,984 +/- 25 m, a value not confirmed by any direct pressure-gauge descent.
29. GEBCO maintains the reference global bathymetric grid under joint IHO/IOC auspices; the Seabed 2030 project, launched in 2017, aims to map the entire ocean floor. Its own reporting for World Hydrography Day 2025 put 27.3 per cent of the ocean floor mapped to modern standards, up from 26.1 per cent a year earlier — so roughly three-quarters of the seafloor remains unsurveyed at modern resolution. V55 verification basis: the Seabed 2030 announcement was retrieved in summary; the GEBCO grid documentation itself was not opened, this session having no direct network access to gebco.net.