1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Stratigraphy  \Stra*tig"ra*phy\,  n.  [Stratum  +  -graphy.] 
  That  branch  of  geology  which  treats  of  the  arrangement  and 
  succession  of  strata. 

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