A TYi'JCAL CAUCASIAN CANYON 



"These canyon-like ravines are the most striking topographical features of central_ Da- 

 ghestan. They are seldom more than 300 or 400 feet wide at the bottom, and are shut in by 

 high walls, which are either sheer precipices or steep slopes broken into narrow, ste«-Hke 

 terraces by outcropping ledges of sedimentary rock" (see text, page 11 15). 



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