Mystery Atlas
Person

Robert Schoch

An American geologist who dove at Yonaguni in 1997 and concluded the formation is a natural sandstone structure shaped by regular fracturing along bedding planes, the same process visible in similar above-water rock formations on the island.

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  • Yonaguni Monument

    Robert Schoch was used to analyse Yonaguni Monument — His 1997 dive and geological assessment concluded the formation is natural sandstone.

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What Is the Yonaguni Monument?

What the Yonaguni Monument is: Japan's submerged rock formation, the man-made monument theory, and why most geologists say it's entirely natural.