Triassic Petrified Wood P-APW-17-002 Fossil Insect Marlstone and volcanic tuff are

Marlstone and volcanic tuff are interstratified with oil shale

though occasionally elevated to family rank

(crane fly)

resulting in a largely horizontal posture

Triassic Petrified Wood P-APW-17-002 Fossil Insect Marlstone and volcanic tuff areAraucarioxylon arizonicum Chinle Formation (Late Triassic) Petrified Forest Member Navajo County, Arizona This specimen is a colorful and well preserved polished slab of the petrified wood cf. Araucarioxylon. The slab is 23. 5 by 18. 5 inches and has excellent preserved detail. The slab is 1 4 inch thick and is backed by 1 2 plywood. Araucarioxylon arizonicum is an extinct species of conifer that is the state fossil of Arizona. The species is known