دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a distinctive body of rock that can be identified by its lithologic or structural features regardless of its fossils or time boundaries;commonly, a formation. Compare time stratigraphic unit.

n: a layer of rock, with or without facies variations, deposited during a distinct geologic time interval. Compare rock stratigraphic unit.