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首页> 外文会议>International Symposium on the Jurassic Boundary Events and the Annual Symposium of the International Geoscience Program IGCP 506: Marine and Non-Marine Jurassic; 20051101-04; Nanjing(CN) >Biodiversity and palaeoclimate of the Middle Jurassic floras from the Tiaojishan Formation in western Liaoning, China
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Biodiversity and palaeoclimate of the Middle Jurassic floras from the Tiaojishan Formation in western Liaoning, China

机译：辽西刁集山组中侏罗统植物区系的生物多样性和古气候

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摘要

The Middle Jurassic Tiaojishan Formation in Beipiao City, western Liaoning comprises a variety of plant fossils including leaf impressions, compressions, permineralized rhizomes, fossil wood and dispersed spores and pollen grains. Impression and compression data suggest that the flora in the Tiaojishan Formation is dominated by Bennettitales, ferns and Nilssoniales, followed by ginkgophytes; conifers and sphenopsids are less common. Abundant permineralized rhizomes are referable to diverse taxa within fern families such as Os-mundaceae and Cyatheaceae. Abundant and upright fossil stumps are common in the Tiaojishan Formation. They are well preserved with distinct growth rings and are predominatly conifers. The floristic signature of the Tiaojishan Formation indicates that subtropical to temperate warm and humid climates prevailed during the late Middle Jurassic in the Beipiao area. Growth ring pattern analysis of the fossil conifer wood demonstrates a consistent and distinct seasonal climate during this interval. The biodiversity of the remarkable Tiaojishan flora provides essential evidence for understanding the vegetation, palaeoclimate and environmental evolution of western Liaoning during the Middle to Late Jurassic.
机译：辽西北票市的侏罗纪中层刁集山组包括多种植物化石，包括叶片印模，压实，矿化的根茎，化石以及分散的孢子和花粉粒。压缩和压缩数据表明，跳鸡山组的植物区系主要为Bennettitales，蕨类植物和Nilssoniales，其次是银杏植物。针叶树和蝶类较不常见。丰富的矿化根茎在蕨类科（如to科和ya科）中指的是不同的分类单元。刁集山组普遍有大量的直立化石残骸。它们保存完好，有明显的年轮，主要是针叶树。刁集山组的植物学特征表明，北票地区中侏罗世晚期为亚热带至温带温暖湿润的气候。针叶化石木材的年轮模式分析表明，在此间隔内，气候具有一致且明显的季节性变化。刁集山植物区系的生物多样性为了解侏罗纪中晚侏罗世时期辽西西部的植被，古气候和环境演变提供了重要依据。

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