science · 10 August 1923 · 101 years ago
death
Died 10 Aug 1923 at age 85 (born 8 Sep 1837).
American geologist and scientific explorer known for his studies and explorations of the iron-ore and copper deposits in the Lake Superior region in 1866-75, for which he used microscopes and thin sections for petrographic study. His major report was published in 1873. Pumpelly sensed the increasing importance of steel, and advised investors to search for iron rather than gold. Some who followed his advice made fortunes. He surveyed the coal fields of China (1864) and made the first extensive survey (1865) of the Gobi. He journeyed across Siberia by sleigh. Pumpelly found evidence that central Asia had once been occupied by vast inland seas or lakes, which had slowly diminished in size, leaving behind the Aral Sea and numerous small lakes.
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