graywacke - teaching student specimens of a gray dirty sandstone - Unit of 5 specimens

graywacke - teaching student specimens of a gray dirty sandstone - Unit of 5 specimens

Brand: Geological Specimen Supply
4.20 USD Out of stock Buy at Merchant

Graywacke is a type of sandstone with mixed fragments of rock, quartz, and minerals in a clay matrix, formed in deep water during the Upper Cretaceous period.

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  • Default Title — 4.20 USD — Out of stock

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