Araucarioxylon arizonicum is an extinct species of conifer that is the state fossil of Arizona. The species is known from massive tree trunks that weather out of the Chinle Formation in desert badland
Petrified Araucarioxylon arizonicum
Agate House Pueblo, constructed with petrified wood
Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from the earlier continental units of Gondwana, Euramerica and Siberia during the Ca
The supercontinent Pangaea in the early Mesozoic (at 200 Ma)
Alfred Wegener c. 1924–1930
Fossil Dicroidium zuberi leaf from the Early Triassic of Argentina. Dicroidium was a ubiquitous tree across much of southern Pangaea during the Triassic period.