Conor Watkins And J. David Rogers
Colorado Plateau Research
Vermilion Cliffs, AZ Landsliding
Conclusions And References

Next: The Echo Cliffs

CONCLUSIONS

  • The Vermilion Cliffs are mantled by multiple sets of prehistoric landslides, which appear to have occurred over a considerable range of time.
  • Slides formed mostly in the montmorillonite-rich Petrified Forest Member of the Chinle Formation.
  • The conditions fostering the landslides no longer appear active, as slides appear old and dissected.
  • Old slides buttress the base of the cliffs, forcing more recent slides to fail at increasingly higher elevations.

  • Although the stratigraphy is similar, slides at opposing ends of the Vermilion Cliffs are noticeably different, indicating multiple factors actors have likely played a role in their formation.
  • Similar slides occur throughout the southern Colorado Plateau.
  • Analysis using palynology may provide a better idea of when and why the slides occurred.


REFERENCES

  • Ahnert, Frank, (1960), “The Influence of Pleistocene Climate Upon The Morphology of Cuesta Scarps On The Colorado Plateau”, Annals of The Association of American Geographers, Vol. 50, No. 2, pp. 139-156.
  • Baars, Donald L., (1995), “Navajo Country: A Geology and Natural History of the Four Corners Region“, 255 p.
  • Fenton, Cassandra R., Poreda Poreda, Robert J., Nash, Barbara P., Webb, Robert H., and Cerling, Thure E., (2004), “Geochemical Discrimination of Five Pleistocene Lava Discrimination of Five Pleistocene Lava-Dam Outburst-Flood Deposits, Western Grand Canyon, Arizona”, The Journal of Geology, Vol. 112, pp. 91-110.
  • Hamblin, W. Kenneth, (1994), “Late Cenezoic Cenezoic Lava Dams In The Lava Dams In The Western Grand Canyon”, Geological Society of America Memoir 183, 139 p.
  • Reiche, Parry, (1937), “The Toreva-block, a distinctive block, a distinctive landslide type”, Journal of Geology, v. 45, no. 5, pp. 538-548.
  • Strahler, Arthur N., (1940), “Landslides of the Vermilion and Echo cliffs, northern Arizona“, Journal of Geomorphology, Vol. 3, pp. 285-301.
Next: The Echo Cliffs

Questions or comments on this page?
E-mail Dr. J David Rogers at rogersda@umr.edu
or Conor Watkins at cwatkin@umr.edu.