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Petrified Forest (Petrified Forest), Arizona, USA

Petrified Forest (Petrified Forest), Arizona, USA.

 This petrified trees standing there over 225 million years. Covered with volcanic ash-rich silicates, the weather turned to stone, that silicon has penetrated the trunk and formed quartz crystals. Before about 60 million years ago there was a lifting Colorado plateau, forming the mountains and the start of intense erosion that has laid bare petrified trees.

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