BULL. GEOL. SOC. AM. 



VOL- 18, 1906, PL. 37 



FiuuiiE 1. — Modern i.-luvial and veolian Bed.s 



Cross-bedded fpolian sand, lying upon the fluvial gravel of a typical climatic 

 terrace at the northern base of the Kwen liUn mountains. They show how fluvial 

 and a?olian strata may be interbedded. On the left the cross-bedded layers not only 

 overlie fluvial deposits, but are capped by other fluvial deposits — fine clay, which 

 breaks off in lumps 



Figure 2. — Mesozoic /Tsolian Beds 



The white Colob (.Jurassic '!} sandstone of Utah, near Kanab 



TYPES OF SUBAERIAL DESERT DEPOSITS 



