Sangamon

[sang-guh-muh n]
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noun Geology.

the third interglacial stage of the Pleistocene Epoch in North America, after the Illinoian glacial stage and before the Wisconsin.

Origin of Sangamon

First recorded in 1930–35; after Sangamon County, Ill.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of sangamon