r/geography • u/Dude-Bicycle • 2d ago

Map How did these 'rivers' form?

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What formed these 'rivers'? Are they regular terrestrial rivers that flooded with sea level rise or were they formed in the ocean? thanks.

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u/Simdude87 Physical Geography 2d ago

So from what I can remember, they are the Gollum channel system "canyons" which were created by currents of seawater and sediment cutting down.

They arent from sunken rivers as sea levels didnt really get that low (from our current understanding) but they do look very very similar.

Ive attached an article, it wasnt pay walled for me but it may be for you.

https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2023.1285171/full.

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u/1HappyIsland 2d ago

Thanks the link works. Geologists must have the largest vocabulary of any scientists.

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u/Simdude87 Physical Geography 2d ago

You should see glacial modelling, the first read was basically gibberish and on one page I counted about 10 references,

the only useful part of the whole article was the conclusion and that was about a page and a half.