Stratify \Strat"i*fy\, v. t. [imp. & p. p. {Stratified}; p. pr.
& vb. n. {Stratifying}.] [Stratum + -fy: cf. F. stratifier.]
To form or deposit in strata, or layers, as substances in the
earth; to arrange in strata.
[1913 Webster] Stratigraphic