Third-day road log: From Cuba to La Jara, Regina, Almagre Arroyo, Llaves, Gallina, Arroyo del Agua, Coyote, Youngsville and Abiquiu Dam
— Spencer G. Lucas, Adrian P. Hunt, Thomas E. Williamson, Barry S. Kues, and Virginia T. McLemore

The trip for the third day first proceeds north on NM-44 and NM-96 through extensive outcrops of the Eocene San Jose Formation. At Stop I we will examine outcrops of the Regina Member of the San Jose Formation and discuss the geology and economic resources of the southeastern San Juan Basin. The trip then proceeds north on NM-96 to near the old Llaves Post Office, where at Stop 2 we will discuss the geology of the type section of the Llaves Member of the San Jose Formation. The trip then reverses its course south on NM-96 to the junction with NM95, where it then heads east on NM-95. The route passes through hogbacks of the Mesaverde Group that mark the eastern edge of the San Juan Basin and proceeds into a terrane dominated by flat-lying Permian-Cretaceous strata. The trip ends with Stop 3 at Abiquiu dam, where we will discuss engineering geology of the dam and the Upper Triassic stratigraphy of the Chama Basin.