Location: 36° 30' to 36? 45'N, 106° 18' to 106° 38' W, Rio Arriba County
Type: Four scoria cones and associated basaltic lava flows.
Age: Late Pleistocene
Unusual location on summit of Tusas Moun- tains; flows from the twin Brazos cones flowed several thousand feet down in elevation along the Brazos Box to the lower elevations at Tierra Amarilla.
Brazos Cliff with Brazos Cones on far right
View Tusas Brazos Volcanos in a larger map
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