74 



Plate 29.— Classification: system Riverine, SUBSYSTEM Lower Perennial, CLASS Unconsolidated Bottom, SUBCLASS Sand, WATER 

 REGIME Permanently Flooded, WATER chemistry Fresh. Channel meanders, a typical feature of lower perennial streams, are 

 especially well developed along this section of the Yellowstone River. (Yellowstone National Park, Park County, Wyoming; May 

 1985; Photo by F. C. Golet) 



