湖南澧县下第三系歇架山组孢粉组合

THE SPORO-POLLEN ASSEMBLAGES OF THE LOWER TERTIARY XIEJIASHAN FORMATION IN LIXIAN COUNTY OF HUNAN PROVINCE

佟承旭

Tong Chengxu

地质矿产部第三地质大队

No.3 Geological Survey Party, Ministry of Geology and Mineral Resources

湖南澧县下第三系歇架山组的孢粉化石,可以划分为两个孢粉组合,第一组合分布于歇架山组下段.这个组合特征是“具孔粉”类型,其中包括榆粉、小榆粉、褶皱粉、亚三孔粉,其时代为晚古新世.第二组合分布于歇架山组上段.这个组合特征是以三沟粉、三孔沟粉(山毛榉科、桃金娘科、桦科、榆科)为主,其时代为早始新世.

The sporo-pollen fossils of the Tertiary Xiejiashan Formation in Lixian County of Hunan Province can be devided into two assemblages. The first one widespreads through out the lower section of the Xiejiashan Formation, which partly consists of Ulmipollenites, U. minor, Plicapollis, Subtricolpollenites. The age of the assemblage is of late Paleocene. The second one distributes at the upper section of the Xiejiashan Formation, which is characterized by Tricolpits and Tricolporopollenites (Ulaceae, Fagaceae, Myrtaceae, Betulaceae) and the age is of early Eocene.

https://doi.org/10.11781/sysydz198901098