Albuquerque volcanic field

It is located about 7 miles (11 km) west of the city of Albuquerque, and is contained within the borders of Petroglyph National Monument.

Fragmented cinder and spatter material and lava flows dip at angles as high as 55° away from the central vent on the eastern and southern side of the Vulcan.

The spatter material is thickest on the southeastern side of Vulcan, indicating that it was blown by the wind toward the south and east during the fountaining events.

A solidified lava pond that consists of a massive gray basalt with weakly developed columnar jointing occupies the crater of Vulcan.

Radial, sinuous lava tubes 8 to 20 inches across and 300 feet long are preserved on the northeast and northwest flanks of Vulcan.

JA Volcano, as seen from its western flank, at Petroglyph National Monument in New Mexico
Black Volcano in Petroglyph National Monument, as seen from its south, at the trail head connecting it to JA volcano on January 14, 2009