Talk:Oceanic trench

Volcanoes Mid‑importance

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Geology High‑importance

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Blake Basin . . .

Please look at Blake Basin and kindly give it a link to somewhere else in WP. Thank you. Sincerely, GeorgeLouis (talk) 01:43, 24 December 2007 (UTC)[reply]

Sudden jump in complexity...

Somewhere around the third or fourth section, this article's complexity suddenly jumps about eight grade levels - it's simply a mash of terms with little explanation made for each. I might try my hand at fixing this. Z S 16:39, 5 October 2009 (UTC)[reply]

I've been trying to make incremental improvements. If I get ambitious, I'll incorporate some of the references into inline citations while I'm at it. Anyone else who wants to contribute to this effort is welcome.Elriana (talk) 19:49, 21 May 2017 (UTC)[reply]

Cross-section please?

The section on morphological expression is begging for a cross-sectional illustration and/or clear bathymetric example with labels of the 'outer rise', 'outer slope' and 'inner slope'.Elriana (talk) 19:51, 21 May 2017 (UTC)[reply]

I added some illustrations going part way to what you suggest. --Epipelagic (talk) 06:34, 22 May 2017 (UTC)[reply]

Thanks! I didn't expect anyone to be that fast. They're not perfect for this purpose, but these images are a good step in the right direction. Elriana (talk) 20:24, 22 May 2017 (UTC)[reply]

Great, thanks! In addition, in Morphology, last paragraph starting with "As the subducting plate approaches the trench", it talks about "bending faults that give the outer trench slope a horst and graben topography". The Horst and Graben slats, do they run parallel to the trench axis, or perpendicular? Hard to imagine anything spreading there. Tx. OsamaBinLogin (talk) 05:05, 22 March 2024 (UTC)[reply]

Parallel to the trench generally, although older inherited structures could potentially alter this a bit. As the downgoing slab flexes, the outer (upper) part will be extended, forming normal faults. Mikenorton (talk) 09:38, 22 March 2024 (UTC)[reply]

Trench rollback?

This process is known more commonly as "slab rollback" (which redirects here and is confirmed by GoogleScholar results), but doesn't even get a mention. It's easy to imagine a slab rolling back, rather more difficult to imagine a trench doing that. I'll change the section heading, unless anyone objects, retaining "trench rollback" as an alternative of course. Mikenorton (talk) 15:10, 24 November 2024 (UTC)[reply]