Petrified wood - Wikipedia
Unlike other plant fossils, which are typically impressions or compressions, petrified wood is a three-dimensional representation of the original organic material. The petrifaction process occurs underground, when wood becomes buried in water or volcanic ash.
Fossils and Paleontology - U.S. National Park Service
2024年11月1日 · Fossils range from the bones of giant dinosaurs like Apatosaurus to the remains of microscopic organisms or grains of pollen. Fossils also include hefty chunks of petrified wood and the trails that trilobites left on the seafloor more than 500 million years ago, as well as insects entrapped in amber and ancient animal dung.
What is Petrified Wood? How Does it Form? - Geology.com
Petrified wood is a fossil. It forms when plant material is buried by sediment and protected from decay due to oxygen and organisms. Then, groundwater rich in dissolved solids flows through the sediment, replacing the original plant material with silica, calcite, pyrite, or another inorganic material such as opal.
What is petrified wood, and how does wood turn to stone?
2024年6月14日 · Petrified wood is classified as a fossil, with some samples dating to hundreds of millions of years ago. Essentially, the material is wood with its biological components replaced by minerals: mostly silica but sometimes fluorite, pyrite, or calcite.
Petrified wood | Fossilization, Formation, Preservation | Britannica
petrified wood, fossil formed by the invasion of minerals into cavities between and within cells of natural wood, usually by silica (silicon dioxide, SiO 2) or calcite (calcium carbonate, CaCO 3).
Petrified Wood - U.S. National Park Service
2018年3月16日 · The park is host to numerous types of plant fossils including complete logs, upright stumps, delicate ferns and gymnosperm leaves, and pollen spores. Most of the petrified trees have been given the scientific name Araucarioxylon arizonicum.
Petrified Wood: A Journey From Tree to Stone - HowStuffWorks
2023年10月26日 · 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.
Permineralization and Replacement - U.S. National Park Service
2024年8月16日 · Petrified Forest National Park contains one of the largest concentrations of permineralized wood in the world. The petrified logs in the park are in the Upper Triassic Chinle Formation. At the time the sediment was deposited, this area was part of a large river system.
Petrified Fossils: A Journey Through Deep Time - petrified fossil
Petrified fossils range from fragmented wood and bone to remarkably complete organisms captured in astounding detail. Here are some of the most impressive petrified specimens ever discovered: Petrified Forests. Immense stone trees are the most iconic petrified remains.
Petrified Wood Virtual Museum | FossilForests.org
Collectors of petrified wood focus on permineralized plant material related to arborescent (tree-like) plant life. Fascination with fossil wood may be related to human reverence for living trees. Trees provide humans and other organisms with shelter and food. We plant trees near our homes and in our communities to enrich the environment.