![]() ![]() In cross-sectional view, it is recognized by its numerous thin veins radiating outward from the central core. Its classification in relation to other members of the plant Kingdom is uncertain. Schilderia adamanica - One of the rarer woods in the petrified forest. In cross-section view these scars usually appear as white veins radiating outward from the central core of the tree. ![]() It is characterized by circular small scars on the outer surface of the tree rounds. Woodworthia arizonica - The second most common species in the petrified forest. All of the rainbow wood is of this species. It is the state fossil of Arizona and is related to the monkey puzzle tree living today. What Species Of Wood Are Found In The Arizona Petrified Forest?Īraucarioxylon arizonicum - 95%+ of the fossilized wood found in the Arizona petrified forest is from Araucarioxylon arizonicum a type of conifer that could grow up to 200 feet tall. These petrified logs became buried under thousands of sediment over time but uplift and erosion eventually re-exposed them at the surface where they are found today. Other minerals such as iron oxides also were deposited along with the silica providing the color. It crystallized within the cellular structure, replacing the organic material. Minerals, including silica dissolved from volcanic ash, absorbed into the porous wood over hundreds and thousands of years. Downed trees that accumulated in river floodplains and channels were periodically buried by floods carrying fine, volcanic ash.īecause of the rapid burial and lack of oxygen the wood did not decay as it would if it was on the surface. The area had a tropical climate and a vast forest grew upon a relatively flat-lying terrain. ![]() If you polish the stone, use a dry cloth only, or an air duster that does not contain any disinfectant or other chemicals.The forest originally formed in the Upper Triassic, about 225 million years ago in the Northwest area of the supercontinent Pangaea. This fossil requires special care - exposure to water and other chemicals, such as cleaning products or aerosols, will damage it over time.
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