The Triassic tree " Araucarioxylon arizonicum " is the Arizona state fossil.
2.
""'Araucarioxylon arizonicum " "'is an extinct species of conifer that is the state fossil of Arizona.
3.
A fossil specimen " Araucarioxylon giftii " named after Prof . Dr . Gift Sironmoney, by Dr . D . E . P . Jeyasingh.
4.
The validity of the name " Araucarioxylon arizonicum " has been questioned . " A . arizonicum " may actually be composed of several different genera and species.
5.
The genus " Araucarioxylon " may thus be superfluous and illegitimate; and the petrified logs of Petrified Forest National Park may be composed of a greater diversity than initially believed.
6.
In Arizona, the petrified woods of the famous Petrified Forest National Park belong to several species of " Araucarioxylon ", the most common of them being " Araucarioxylon arizonicum ".
7.
In Arizona, the petrified woods of the famous Petrified Forest National Park belong to several species of " Araucarioxylon ", the most common of them being " Araucarioxylon arizonicum ".
8.
A petrified log in "'Petrified Forest National Park "', located in northeastern Arizona, USA . The pieces of wood found in the park are mostly of the extinct species " Araucarioxylon arizonicum ".
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