cross-strat·i·fi·ca·tion 
(krôs′străt′ə-fĭ-kāshən, krŏs′-)
(krôs′străt′ə-fĭ-kāshən, krŏs′-)n.
An arrangement of sediment strata deposited at an angle to the prevalent orientation of stratification, usually produced by the migration of sand dunes or ripples.