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Fossil wood may or may not be petrified, in which case it is known as petrified wood or petrified tree. The study of fossil wood is sometimes called palaeoxylology, with a "palaeoxylologist" somebody who studies fossil wood. The fossil wood may be the only part of the plant that has been preserved, with the rest of the plant completely unknown ...
Araucarioxylon arizonicum (alternatively Agathoxylon arizonicum) is an extinct species of conifer that is the state fossil of Arizona. [1] The species is known from massive tree trunks that weather out of the Chinle Formation in desert badlands of northern Arizona and adjacent New Mexico, most notably in the 378.51 square kilometres (93,530 acres) Petrified Forest National Park. [2]
India – protected geological sites known for petrified wood are the National Fossil Wood Park, Tiruvakkarai (20-million-year-old fossils), and the Akal Wood Fossil Park (180-million-year-old fossils). Petrified wood has also been discovered in Dholavira in Kutch, Gujarat, dating back to 187–176 million years. [24]
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Fossil wood is wood that is preserved in the fossil record. Wood is usually the part of a plant that is best preserved (and most easily found). Fossil wood may or may not be petrified. The fossil wood may be the only part of the plant that has been preserved; [101] therefore such wood may get a special kind of botanical name.
This genus is known in the fossil record from the Late Cretaceous to the Miocene (from about 84.9 to 11.6 million years ago). Fossils of species within this genus have been found in Germany, Italy (Sardinia), United States, Egypt, Libya and Argentina (Bororó and Salamanca Formations). [1] Many species were described from the Deccan Traps in India.
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Agathoxylon (also known by the synonyms Dadoxylon and Araucarioxylon [3]) is a form genus of fossil wood, including massive tree trunks.Although identified from the late Palaeozoic to the end of the Mesozoic, [4] Agathoxylon is common from the Carboniferous to Triassic. [5]