Araucarioxylon arizxonicum, conifer

Polished section through the trunk of Araucarioxylon arizxonicum, the dominant conifer of Petrified Forest National Park, Arizona, USA. Width approx. 25 cm. Dates back to the Late Triassic period

Araucariaceae Arizona Conifer Coniferae Coniferophyta Coniferous Gymnosperm Petrified Phanerozoic Pinales Pinophyta Pinopsida Polished Triassic U.s.a

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