Supplemental road log 3: From Durango, Colorado to Pinyon Mesa and the Bluffs south of the San Juan River near Farmington
— Spencer G. Lucas and Thomas E. Williamson

This route will traverse part of the northern and northwestern San Juan Basin in order to examine the stratigraphic relationships of the McDermott Member of the Animas Formation, the Ojo Alamo Sandstone and the upper part of the Kirtland Formation. To do so, a well-exposed section of the McDermott Member at Durango will be examined first; then the Kirtland Formation through Ojo Alamo Sandstone section on the west flank of Pinyon Mesa, north of the San Juan River in New Mexico, will be visited. Finally, we will examine a portion of the Kirtland-Ojo Alamo section in the bluffs south of the San Juan River at a place near Farmington where an in situ dinosaur bone was discovered in the Ojo Alamo Sandstone.