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Calcite Palo Duro Canyon area, Armstrong Co., Texas, USA 5 cm. X 7 cm. Concretion, 5 cm X 7 cm. Calcite in fine sandstone / redbed matrix. Palo Duro Canyon, near Canyon, Texas. These used to be quite common in the canyon, but many of them have been picked up by visitors, picnickers, and the like (which, i suppose, includes me too). (Author: Ed Huskinson)

Calcite
Palo Duro Canyon area, Armstrong Co., Texas, USA
5 cm. X 7 cm.

Concretion, 5 cm X 7 cm. Calcite in fine sandstone / redbed matrix. Palo Duro Canyon, near Canyon, Texas. These used to be quite common in the canyon, but many of them have been picked up by visitors, picnickers, and the like (which, i suppose, includes me too). (Author: Ed Huskinson)

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