Mesozoic stratigraphy of the Chama Basin. Second-day road log from Ghost Ranch to Tierra Amarilla and Chama
— Spencer G. Lucas, Andrew B. Heckert, Kate E. Zeigler, Donald E. Owen, and Adrian Hunt

The second day trip focuses on Triassic, Jurassic and Cretaceous strata of the Chama Basin, especially on their depositional systems and paleontology. Just north of Ghost Ranch, the fi rst stop examines the taphonomy of the Canjilon quarry, a bonebed of Late Triassic phytosaurs and other animals discovered and fi rst collected in the late 1920s. Stop 2 returns to Ghost Ranch to hike the trail to Chimney Rock. Here, we examine the Middle Jurassic Entrada and Todilto formations, with a focus on the evolution of the Todilto depositional system. From Ghost Ranch we proceed north to the Late Triassic Snyder quarry in the Painted Desert Member of the Petrifi ed Forest Formation, essentially at the same stratigraphic level as the Canjilon quarry. The hypothesis that a Late Triassic wildfi re killed the animals in the Snyder bonebed is the focus of this stop. On the highway north to Chama, the fourth and last stop examines a section of Upper Jurassic and Cretaceous rocks, with discussion of their regional stratigraphy, sedimentation, and economic geology.