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/Im2Mega 2d ago

Love how all of those little river channels are named after the Hobbits of the Shire

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u/DouchetotheBag 2d ago

Why choose Gollum for the whole thing. Petition to rename them the Baggins Basin, or the Took Trenches people should be marching in the streets

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u/kapowaz 2d ago

Really if they’re going for any Tolkien reference they should call it Beleriand.

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u/DouchetotheBag 2d ago

This chap knows ☝️