摘要
对数年来陆续在珠江三角洲地区所发现的零星存留的海拔25～35m的Ⅱ级河流阶地的堆积物,作了精细采样处理,测定了其热释光地质年龄为距今(30.10±2.98)×10~4年～(42.64±3.84)×10~4年,从而首次确定粤中地区存在中更新世地层,并肯定Ⅱ级河流阶地是在中更新世形成的,本文还讨论了Ⅱ级河流阶地的地质特征。
We have sampled from some deposits in scattering of second-order river terra-ces (altitude 25～35m) which have been discovered in succession in region of Zhu-jiang river delta in the last few years, and have dealt with carefully. These havebeen dated by thermoluminescence at (30.10±2.98)×10~4 yrs.B.P.～(42.64±3.84)×10~4yrs B.P., thus ascertain the existence of the Middle Pleistocene strata in MiddleGuangdong for the first time, and affirm that second-order river terraces havebeen formed in Middle Fleistocene epoch.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
1990年第4期102-106,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
关键词
第四系
珠江三角洲
河流阶地
Quaternary System
Middle Pleistocene
geological age by thermoluminescence
Zhujiang river delta
river torraces
