Second-day road log: From Cuba to Counselor, Lybrook, Nageezi, Barrel Springs, Fossil Forest, Blanco Trading Post and return to Cuba
— Thomas E. Williamson, Spencer G. Lucas, Adrian P. Hunt, Larry N. Smith, and Barry S. Kues

Today's route traverses a portion of the central San Juan Basin and focuses on the stratigraphy, sedimentology, paleontology and economic geology of the uppermost Cretaceous (Lewis Shale, Pictured Cliffs Sandstone, Fruitland and Kirtland Formations) and lower Tertiary (Ojo Alamo Sandstone, Nacimiento and San Jose Formations) strata exposed in this portion of the basin.

At Stop I, we examine a long-standing mapping error that appeared on Dane and Bachman's ( 1965) and Clemons' (1982) geologic maps of New Mexico, where the contact between the Paleocene Nacimiento Formation and the overlying Eocene San Jose Formation was incorrectly mapped . We will also discuss the lithologies of the Escavada Member of the Nacimiento Formation . From Stop I, we continue west toward Huerfano Peak and tum south to De-Na-Zin Wash. Stop 2, for lunch, is at the parking area overlooking the badland exposures of the Nacimiento Formation of the De-Na-Zin Wilderness Area. Here we will discuss the Cretaceous-Tertiary boundary. After lunch, we continue south to the Bisti badlands. Stop 3, our last stop, is at the Fossil Forest. Here we discuss the coal resources and fossi l flora and fauna of the Upper Cretaceous Fruitland and Kirtland Formations. After Stop 3, we return north to the main highway and travel southeastward back to Cuba.