1. n. [Geology]

A group of relatively conformable strata that represents a cycle of deposition and is bounded by unconformities or correlative conformities. Sequences are the fundamental unit of interpretation in sequence stratigraphy. Sequences comprise systems tracts.

See related terms: conformable,  correlation,  retrogradation,  sequence boundary,  sequence stratigraphy,  stratum,  systems tract,  unconformity