73 



Plate 28.— Classification: SYSTEM Riverine, subsystem Lower Perennial, CLASS Unconsolidated Bottom, subclass Cobble-Gravel, 

 water regime Permanently Flooded, water chemistry Fresh. The channel bottom is composed primarily of gravel and sand. 

 The stream meanders through a grassy annual floodplain which is flanked by a more elevated floodplain supporting cottonwoods 

 (Populus deltoides). (Crook County, Wyoming; May 1985; Photo by F. C. Golet) 



