Much of the park’s petrified wood is from "Araucarioxylon arizonicum" trees, while some found in the northern part of the park is from "Woodworthia arizonica" and "Schilderia adamanica" trees.
Большинство окаменелых деревьев парка принадлежат к виду "Araucarioxylon arizonicum", в северной части парка также найдены окаменелости "Woodworthia arizonica" и "Schilderia adamanica".