kivettymästä
Kivettymästä, derived from the Finnish word meaning "petrification," refers to the geological process by which organic material, such as wood, is gradually replaced by minerals. This transformation typically occurs over long periods when organic matter is buried under sediment, such as mud, sand, or volcanic ash. The mineral-rich groundwater seeps through the porous organic material, dissolving the original cellular structure and depositing mineral crystals in its place.
Common minerals involved in petrification include silica, calcite, and pyrite. Silica, in the form of chalcedony
The process requires specific conditions, including a lack of oxygen to prevent decay and the presence of