The Rio Grande rift has been an important site for humans for a long time, because it provides a north–south route that follows a major river. The Rio Grande follows the course of the rift from southern Colorado to El Paso, where it turns southeast and flows toward the Gulf of Mexico. Important cities, including Albuquerque, Santa Fe, Taos, Española, Las Cruces, El Paso, and Ciudad Juárez, lie within the rift.
^ abChapin, Charles E.; Cather, Steven M. (1994). "Tectonic setting of the axial basins of the northern and central Rio Grande rift". In Keller, G. Randy; Cather, Steven M. (eds.). Basins of the Rio Grande Rift: Structure, statigraphy, and tectonic setting. Geological Society of America Special Paper No. 291. Boulder, Colo.: Geological Society of America. pp. 1–3. ISBN0-8137-2291-8.
^Kluth, C.; Schaftenaar, C. (1994). "Depth and geometry of the northern Rio Grande rift in the San Luis basin, south-central Colorado". In Keller, G. Randy; Cather, Steven M. (eds.). Basins of the Rio Grande Rift: Structure, statigraphy, and tectonic setting. Geological Society of America Special Paper No. 291. Boulder, Colo.: Geological Society of America. pp. 27–37. ISBN0-8137-2291-8.