Raphael Pumpelly

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Raphael Pumpelly (1837 – 1923) was an American geologist and explorer.

Invited by the respective governments, he surveyed parts of Japan and China. He made the first extensive survey of the Gobi Desert, and explored Mongolia and Siberia.

Later he was Professor of Mining Science at Harvard University. Among his scientific accomplishments, a theory of secular rock disintegration. He was influenced by Louis Agassiz.

The mineral Pumpellyite, a variety of "greenstone" found only in Keweenaw County in the Upper Peninsula of Michigan, was named in his honor.

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