by: Charles O’Dale

  • Type: Central peak
  • Age Ma: 260-323 (Geological dating)aPERMIAN
  • Diameter: 5.5 km
  • Location: N 37° 53’ 38″ W 92° 43’ 00″
  • Shock Metamorphism:  breccia, shatter cones, planar elements in quartz and intense intragranular deformation.

aThe age of the Decaturville impact structure is not definitely known but is almost certainly post-Pennsylvanian, and may be younger than Cretaceous.

Decaturville impact structure, a complex crater with a central uplift (smaller circle).

The Decaturville structure is positioned in the background of this image. We took this image on our post solar eclipse USA crater tour, 2017.
Impact and explosion cratering: Planetary and terrestrial implications; Proceedings of the Symposium on Planetary Cratering Mechanics, Flagstaff, Ariz., September 13-17, 1976. (A78-44030 19-91) New York, Pergamon Press, Inc., 1977, p. 321-341.
Generalized geologic map of the Decaturville structure.
A sample from the rim of the Decaturville, MO, impact crater. (Courtesy Robert Beauford).


Offield, T. W., Pohn, H. A., Deformation at the Decaturville impact structure, Missouri.  Roddy, D.J., Pepin, R.O. and Merrill, R.B., eds., Impact and Explosion Cratering, Pergamon Press, New York, pp. 321-341. 1977