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Petrified wood
Petrified wood is a type of fossil: it exists of fossil wood where all the organic materials have been replaced with minerals (most often a silicate, such as quartz), while retaining the original structure of the wood.
Note: The above text is excerpted from the Wikipedia article "Petrified wood", which has been released under the GNU Free Documentation License.
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May 9, 2025
May 6, 2025 — Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new ...
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Apr. 30, 2025 — A new study traces a 120-million-year-old 'super-eruption' to its source, offering new insights into Earth's complex geological ...
Latest Headlines
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