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    Petrified Wood: A Journey From Tree to Stone

    Petrified wood refers to a fossil formed when the organic components of woody plant material are gradually replaced by minerals, predominantly silica, via a process called permineralization.

    This process can only take place under the right set of circumstances.

    When an organism dies, it usually decomposes. Such is the circle of life.

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  • The process that most people call "rotting" is a type of decay which sets in as microorganisms break down organic matter. Usually, a dead, fallen tree will be subjected to this process.

    Once in a while, though, a newly deceased tree (or some other kind of woody plant) gets rapidly buried by mud, silt or volcanic ash.

    This blanketing material, or sediment, then shields the dead tree from oxygen. Because oxygen is the main driving force behind the decaying process, the smothered plant will begin to decompose far more slowly than it normally would.

    Meanwhile, mineral-laden water or mud seeps into the dead tree's pores and other openings.

    As our plant's internal structure gradually breaks down, it

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