Here's why:
* Original Material: Petrified wood starts as organic material - actual wood from trees.
* Replacement Process: Over time, the wood is buried and groundwater carrying dissolved minerals infiltrates the wood. The minerals replace the original organic material, molecule by molecule, preserving the wood's structure.
* Rock-like Properties: This process turns the wood into a solid, hard material with a rock-like appearance.
Is it metamorphic?
No, petrified wood is not metamorphic. Metamorphic rocks are formed when existing rocks (igneous, sedimentary, or even other metamorphic rocks) are transformed by heat, pressure, and/or chemical reactions.
Petrified wood is formed by a different process - replacement, where organic material is replaced by minerals. This process does not involve the transformation of pre-existing rock.
Therefore, petrified wood is a fossil, a preserved piece of organic material, and not a rock.
