Saturday, July 17, 2010

Tulsa, OK, USA

Official Postcrossing card from Rachel (USA).

The story of Oklahoma State Rock

Before dinosaurs were in existence, the sea covered Oklahoma depositing barium sulfate into the sand. As the climate changed, the sea dried up, and crystals (rose rocks) were formed. Iron oxide in the sand gave the rocks their reddish color. These beautiful, rare, rose rock clusters can be viewed at Timberlake Rose Rock Museum in Noble, Oklahoma.

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