This is standard and quite colorful petrified wood. It is preserved as fallen, scattered logs where the wood has been replaced by various minerals over long periods of time and eventually erosion brings them back to the surface again.

Petrified wood is not wood at all; rather, it is stone. It is formed when a forest gets berried in a landslide or under heavy volcanic ash where the shape of the trees are preserved and they are eventually compressed under high pressure until it is eventually decays and gets compressed into stone.
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