Minerals such as iron and manganese gave the petrified logs at Petrified Forest National Park their color.
Minerals such as iron and manganese gave the petrified logs at Petrified Forest National Park their color.
Photograph by Juan Carlos Muñoz, AGE Fotostock

Petrified Forest National Park

Thousands of logs litter a stretch of grassland at Petrified Forest National Park in northeastern Arizona. From far away, the logs might look ordinary. But they contain a surprise. The shiny, multicolored insides of the stumps are made of rock, not wood! How did the trees turn to stone? It wasn’t with the help of a magician. Instead the transformation was the result of a natural process that took place over millions of years.

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