There is a really good popular article on the origins and rise of dinosaurs in the Triassic in the new issue of Science News.
Although uncredited the incredible "Triassic Neighborhood" mural was done by Victor Leshyk and commissioned by the National Park Service for the Rainbow Forest Museum at Petrified Forest National Park (Leshyk does retain copyright for uses such as this). This is a scene of animals from the time when the Blue Mesa Member was being deposited.
Overview of the Aetosaurs
2 hours ago in Chinleana