Land vertebrate faunachrons are biochronological units used to correlate and date terrestrial sediments and fossils based on their tetrapod faunas. First formulated on a global scale by Spencer G. Luc
Mastodonsaurus, a purported index fossil of the Berdyankian LVF
Mastodonsaurus DB
Eocyclotosaurus wellesi 1DB
Cynognathus NT small
Chinle Formation
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The Chinle Formation is an Upper Triassic continental geological formation of fluvial, lacustrine, and palustrine to eolian deposits spread across the U.S. states of Nevada, Utah, northern Arizona, we
Triassic land vertebrate faunachrons
…biostratigraphy may be useful in limited circumstances. Phytosaurs in particular have played a large role in the tetrapod biostratigraphy of the Chinle and Dockum Group of the southwest United States. A revision of the LVF system in this narrow context was undertaken by Jeff Martz and Bill Parker (2017…
Chinle Badlands, Grand Staircase–Escalante National Monument, Utah, US.
Fossil wood from Chinle Formation exposures at Petrified Forest National Park
Petrified Forest National Park araucarioxylon fossil wood weathered from the Chinle Formation
The Whitaker ("Coelophysis") Quarry at Ghost Ranch, preserving the "siltstone member" of the Chinle Formation