Except for a tiny outcrop only a few miles in size up near Fredonia, Arizona has no Triassic marine exposures. The Virgin Limestone is primarily a Utah formation, and represents a marine transgression onto the predominantly terrestrial Moenkopi strata.
Fossils are few and appear to be mostly red chertized molluscs.
Here are some of the more typical fossils we found in the Virgin Limestone in Arizona. Bellerophon Gastropods were having their last hurrah in the Triassic, and these chertized specimens reveal thier presence. Preservation in the Virgin here is poor, and only a handfull of good speciemens were to be had. The bellerophontids here ranged in size from .25 to 1 inch diameter. This partially chertized crab claw was also found in the limestones, and was dissolved out with muriatic acid.