From Ohio History Central
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Eskers are long, sinuous, snakelike ridges of sand and gravel that was deposited near the base of a melting glacier as water flowed in a subglacial stream. A prominent esker is visible along U. S. Route 23, north of Circleville. Portions of this esker are mined for sand and gravel.
[[Category:Natural History]] [[Category:Glossary