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DickieMcHamhox t1_j6uzspz wrote

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WhyteBeard t1_j6vf9u9 wrote

Was also thinking caldera, looks like volcanic formations.

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CanadianJogger t1_j6vp2ha wrote

Nod, the composition looks volcanic, and the islands were formed that way, though 54 million years ago. Found this:

>Meanwhile, the majority of the Faroe–Rockall Plateau has subsided beneath sea level while erosive forces–especially during the last few million years of alternating glacial and interglacial periods–have sculpted the landscape into their present-day shape.

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