Geologic Map of Meteor Crater, Arizona
Geologic map of Meteor Crater, Arizona, produced by Eugene M. Shoemaker (1960). In addition to locating the bedrock lithologies (Coconino-Toroweap, Kaibab, and Moenkopi Formations), he also mapped the interior breccia deposits, exterior debris deposits, and faults that cross-cut the crater walls. Many of the features represented by this map had previously been identified by Barringer (e.g., 1905), but Shoemaker mapped them in exquisite detail and provided useful comparisons to geologic features produced in a nuclear explosion crater. This figure is a colorized version of Shoemaker’s original map and is reproduced from Figure 3.3 in David A. Kring’s “Guidebook to the Geology of Barringer Meteorite Crater, Arizona.” Target lithologies visible in the crater walls are the Permian Toroweap and Coconino Formations (undivided, Ptc), Permian Kaibab Formation (Pk), and Triassic Moenkopi Formation (Tm). Overturned and ejected Quaternary debris from those units are identified with diagonal hatching (Moenkopi ejecta), horizontal hatching (Kaibab ejecta), and a different shade of color (Coconino ejecta). Impact-generated breccias are identified with different shades of red and pink. New work by David A. Kring and colleagues has revealed new features around the crater that are being incorporated into an updated map.