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
Significance:

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.


Composition:

 Basalt



 

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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