What is a form of petrification which mineral completely replaces an organisms tissue?

Petrification, also known as mineralization or replacement, is a process in which organic material is replaced by minerals, typically over a long period of time. There are different forms of petrification, but the one in which the mineral completely replaces an organism's tissue is called pervasive mineralization or complete petrification.

In pervasive mineralization, the entire organism, including its internal structures and microscopic details, is replaced by mineral matter. This type of petrification occurs when mineral-rich water or groundwater seeps into the organism's remains and gradually replaces the organic material with minerals. The minerals may be silica (quartz), calcite (calcium carbonate), pyrite (iron sulfide), or other mineral compounds.

Pervasive mineralization results in the formation of solid, stone-like replicas of the original organism. These replicas preserve the form, shape, and intricate details of the organism, providing valuable insights into ancient life and the conditions under which the petrification occurred. Examples of pervasive mineralization include fossilized bones, shells, wood, and leaves.