36° 36° 1 1 4 ° 1 1 4 ° 1 1 3 ° 1 1 3 ° 1 1 2 ° 1 1 2 ° 37° 37° Page Tusayan Fredonia Colorado City COCONINO COUNTY MOHAVE COUNTY 112°0'0"W 112°0'0"W 113°0'0"W 113°0'0"W 114°0'0"W 114°0'0"W 37°0'0"N 37°0'0"N 36°0'0"N 36°0'0"N Breccia pipes and possible breccia pipes, northwestern Arizona Breccia pipes, mineralized (USGS OFR-89-550) (64) Collapse features (USGS OFR 89-550) (1294) Collapse features (from USGS maps) (1133) Circular features (Wenrich, unpublished) (1061) Fault Fault with evidence of Quaternary activity p 0 10 20 30 40 50 Kilometers 15 89 89 64 180 64 67 389 89 Geologic base map from AZGS Digital Information Series DI-8 (931) 0 Partial database for breccia pipes and collapse features on the Colorado Plateau, northwestern Arizona Arizona Geo logical Surv ey Digital Informa tion Series DI-24 (map graphic to accompany geodatabase) (note:mineralized breccia pipes area subset ofcollapse features from USGS OFR 89-550)