Tusas-Brazos Volcanoes

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 Mountains; flows from the twin Brazos cones flowed several thousand feet down in elevation along the Brazos Box to the lower elevations at Tierra Amarilla.




Dr. Larry Crumpler


Brazos Cliff with Brazos Cones on far right

Photo: Larry Crumpler




View the Tusas Brazos Volcanoes in a larger map


All text and photo credit due to Dr. Larry Crumpler, New Mexico Museum of Natural History and Science 

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