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The Portage County rock is flagstone rock donated by Lucky Sand & Gravel Company in Mantua. It is most likely part of the outwash carried by the Ice Age glaciers which created many glacial lakes in the Mantua area. The last glacial advance left Portage County with many deep deposits of sand and gravel. Portage County serves as a major contributor to the aggregate industry. | Portage

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Portage.jpg - The Portage County rock is flagstone rock donated by Lucky Sand & Gravel Company in Mantua.  It is most likely part of the outwash carried by the Ice Age glaciers which created many glacial lakes in the Mantua area.  The last glacial advance left Portage County with many deep deposits of sand and gravel.  Portage County serves as a major contributor to the aggregate industry.

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