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It is said that Yonaguni lies about 20 meters deep. It could have been built during one of the last ice ages when there was (much) more ice present on the Northern hemisphere, and the sea level was correspondingly lower. That was between 12,000 and 110,000 years ago.

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Yonaguni question 918 Qleap 22-Feb-16 16:43
Re: Yonaguni question 401 Buildreps 22-Feb-16 18:51
Re: Yonaguni question 357 Qleap 22-Feb-16 19:20
Re: Yonaguni question 341 Buildreps 23-Feb-16 19:16
Re: Yonaguni question 520 Harte 23-Feb-16 00:10
Re: Yonaguni question 363 Qleap 23-Feb-16 14:50
Re: Yonaguni question 366 Archae Solenhofen 23-Feb-16 18:46
Re: Yonaguni question 386 Qleap 23-Feb-16 19:27

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