BULL. GEOL. SOC. AM. 



VOL. 19, 1907, PL. 40 



Figure 1. — Coioie Raxge^ Southern Arizona 

 Characteristic sharp meeting of monntain and plain 



Figure 2. — Cretacic Saxdstoxes near Los Cerrillos^ New Mexico 



Plain beveling tilted strata 



TWO DESTRUCTIVE DESERT FEATURES 



