下部地层 meaning in English
lower segment
su tratum
substratum
Examples
- There were two conventional 14c ages , 9965 + 110 years on charcoal grains from the upper strata and 14550 + 450 years on fossil bones from the lower part . thus zhangkou cave was considered being late pleistocene to early holocene in time
已测定上部地层炭屑和下部地层骨化石的常规~ ( 14 ) c年龄分别为9965 110和14550 450年，发掘者据此认为该地点的年代为晚更新世末至全新世早期。