Lopingian mixed floras from Linxi Formation in Soron area, Inner Mongolia |
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Authors: | ZHANG Dejun SUN Yuewu DING Haisheng YANG Zhenyuan and TANG Lijing |
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Institution: | 1. Research Center of Paleontology & Stratigraphy,Jilin University,Changchun 130026,China; 2. College of Earth Sciences,Jilin University,Changchun 130061,China; 3. Key Lab for Evolution of Past Life and Environment in Northeast Asia,Ministry of Education (Jilin University), Changchun 130026,China |
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Abstract: | A lot of well-preserved plants from the Linxi Formation are collected in the Soron area,Inner Mongo- lia,consisting of 34 species of 16 genera. They are Late Permian in age. The flora is characterized by a lot of Angaran plants,such as Paracalamites,Comia,Rhachiphyllum,Iniopteris,Rufloria,etc. Some Cathaysian ele- ments,such as Lobatannularia lingulata,L. multifolia,Fascipteris Cathaysiantus,F. densata,Taeniopteris szei,Cladophlebis liulinensis and C. permica,are also mixed within the present flora. This indicates that the So- ron of Inner Mongolia was located in the sector between the Angaran and Cathysian floristic provinces in Loping- ian. It is beneficial for depicting the location and the evolution of the Solenker--Xar Moron suture zone in the phytogeographic view. The transmigration of tropical and subtropical Cathaysian plants to the north indicates that the Paleoasian Ocean was closed during the late Permian along the suture zone. |
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Keywords: | Permian Angaran flora Cathaysian flora Solenker--Xar Moron suture zone Jiamusi-Mongolia Block North China Plate |
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