time-stratigraphic unit时间;[地质] 时间地层单位;时代地层单位
time-stratigraphic correlation时代地层对比
time-stratigraphic classification年代地层区分
time-stratigraphic facies[地质] 时间地层相;年代地层相
para-time-stratigraphic unit实用时间地层单位
time-rock unit time-stratigraphic unit时代