PETRIFIED WOOD
Petrified wood (from the Greek petro meaning "stone", literally "wood turned into stone") is a type of fossil. the study of these trees is part of the geology, but also of paleobotany and paléoenvironnements.Il study is composed of fossilized wood where all traces of organic matter have been replaced with minerals (most often silicates such as quartz), while retaining the original structure of bois.Le petrification process occurs when wood is buried under a layer of sediment, where it retains primarily because of a lack of oxygen before a mineral-rich water is flowing through the sediment and gradually replacing the wood cells by minerals. Less than a hundred years are probably necessary for some pieces of wood can be petrified.
