Date of Award
Master of Science in Biological and Environmental Sciences (MSBES)
Environmental and Earth Sciences (EVES)
David E. Fastovsky
In the Late Triassic of Petrified Forest National Park (PEFO), AZ, the coincidence of high-precision geochronology and robust lithostratigraphy allows an adaption of the Bayesian statistical approaches of Haslett and Parnell (2008) and Alroy (2014) to quantify the dynamics of a Late Triassic vertebrate extinction and replacement, the Adamanian-Revueltian (A-R) faunal turnover. This analysis indicates negligible probability of synchroneity of Adamanian extinctions and Revueltian originations. This protracted reconstruction of the A-R turnover decouples the event from the geologically instantaneous Manicouagan impact (215.4 + 0.20 Ma; Québec, Canada), previously implicated as a causal mechanism.
Hayes, Reilly F., "DYNAMICS OF THE LATE TRIASSIC ADAMANIAN-REVUELTIAN EXTINCTION, PETRIFIED FOREST NATIONAL PARK, AZ" (2019). Open Access Master's Theses. Paper 1454.
Available for download on Monday, April 19, 2021