Supplemental road log 1: From Grants to eastern margin of El Malpais, Sandstone Bluffs Overlook, and McCartys lava flow
— Larry S. Crumpler, Jayne C. Aubele, Spencer G. Lucas, and Andrew B. Heckert

This road log visits some of the landscapes associated with El Malpais National Monument and regional volcanism in the Grants area. The road log takes us from Grants eastward to NM Highway 117, and southward along NM 117 to two stops along the eastern margins of El Malpais. Although the area has been visited during previous New Mexico Geological Society Field Conferences, this trip will focus on the physical characteristics of the lava flows.

Stop 1 will be at the Sandstone Bluffs Overlook of El Malpais National Monument for a regional overview, including the Zuni Mountains and Mount Taylor, and discussion of general physical volcanology, natural history, and historical characteristics of the lava flows of El Malpais. Stop 2 will be an examination of the youngest lava flow, the McCartys lava flow. Discussions will center on the overall physical volcanological characteristics of the flow, with an emphasis on evidence of modes of lava flow emplacement, and an additional discussion of recent dating results.