PENNSYLVANIAN PLANT FOSSILS OF JIUJUZI FROMATION IN AOHAN QI, CHIFENG CITY, INNER MONGOLIA
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摘要:
内蒙古赤峰市敖汉旗水泉南山附近采集到酒局子组植物化石, 通过系统鉴定, 共计12属18种, 包括楔叶类、木贼类、瓢叶类、真蕨和种子蕨类及科达类等, 其中以Pecopteris (Asterotheca) hemitelioides和Cordaites principalis为代表, 均为晚古生代华夏植物群常见分子或代表分子, 表明赤峰地区在宾夕法尼亚亚纪时应属华夏植物地理大区. 酒局子组的时代应当归于宾夕法尼亚亚纪. 植物群中发现高大的科达类, 并有大量反映热带、亚热带气候的真蕨和种子蕨类, 显示该区当时应处于亚热带-暖温带雨量充沛的湿热环境.
Abstract:Plant fossils are collected from the Pennsylvanian Jiujuzi Formation near Shuiquan Nanshan in Aohan Qi, Inner Mongolia. Through systematic identification, a total of 18 species belonging to 12 genera, involving Sphenophyllales, Equisetales, Noeggerathiales, Filicopsida Pteridophyta and Cordaitopsida, among which Pecopteris (Asterotheca) hemlioides and Cordaites principalis are common and representative Late Paleozoic Cathaysian flora. Therefore the study area should belong to Cathaysian flora geographical region in the Pennsylvanian Subperiod. The age of the Jiujuzi Formation should be assigned to the Pennsylvanian. A large number of genuine ferns, seed ferns and Cordaites, which reflect tropical and subtropical climate, are found in the flora, indicating a wet and warm environment of subtropical-warm temperate zone with abundant rainfall.
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Key words:
- plant fossil /
- Cathaysian flora /
- Jiujuzi Fomation /
- Pennsylvanian /
- Aohan Qi /
- Inner Mongolia
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