摘要
本文详细地报道了贵州省西部晚三叠世火把冲组和二桥组植物群,计有化石植物48属110种。在这个植物群中,苏铁类植物占优势;蕨类植物也很丰富,其中尤以双扇蕨科植物占有重要地位;银杏类植物和松柏类植物有了较大的发展。并在此基础上,对黔西晚三叠世植物群的性质、地质时代以及与国内外同期类似植物群的关系和对比等进行了讨论,确定了黔西晚三叠世植物群的地质时代为诺利克期至瑞替克期。
In this paper, 110 species belonging to 48 genera of fossil plants collected from Huobacong Formation and Ergiao Formation of Western Guizhou prorince are described systematically.
The dominant group of the Western Guizhou flora is Cycadophyta, of Which Cycadales consists of 4 species in 4 genera, Bennettitales 25 species in 6 genera, Nilssoniales 7 species in 1 genus and Cycadopsida Incertae Sedis 6 species in 2 genera. Diptoridaceae (9 speeies in 3 genera) is richer in species than others. Pteridospermae is fairly numerous in the flora. Ginkgoales (7 species in 6 genera) and Coniferales (10 species in 6 genera) are very rich.
Based on the above mentioned, the nature and the age of the flora, the relationship and the comparison between the flora and others are discussed. The age of this flora is ascertained to be the Noric-Rhaetic stage of Late Triassic.
出处
《贵州地质》
1992年第1期26-40,共15页
Guizhou Geology
