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一、前言湖南桑植的三叠系以洪家关一带出露最好,下三叠统大冶组及嘉陵江组为海相沉积, 含菊石及海生双壳类;中三叠统巴东组为海陆交互相沉积,含植物、双壳类及脊椎动物化石;上三叠统鹰嘴山组为陆相沉积,在本区未见顶,含植物化石。1982年笔者在洪家关一带进行地质调查时,在巴东组与鹰嘴山组中采集了孢粉样品。经分析,在巴东组发现了不甚丰富的孢粉化石,保存欠佳,鹰嘴山组含孢粉丰富,保存较好。共建立了三个孢粉组
I. Preface The Triassic of Sangzhi in Hunan Province is best exposed in the Hongjiguan area. The Lower Triassic Daye Formation and the Jialingjiang Formation are marine sediments, ammoniferous rocks and marine bivalves. The Middle Triassic The Badong Formation is an interdependent marine-land facies sediment that contains plants, bivalves and vertebrate fossils. The Upper Triassic Yingzishan Formation is continental sedimentation, with no tops and plant fossils in this area. In 1982, when the author conducted a geological survey in the vicinity of Hongjiguan, he collected sporopollen samples from the Badong Formation and the Yingzishan Formation. After analysis, found in the Badong group is not rich in sporo-pollen fossils, poor preservation, the Sparrow Mountain group of spore-rich, better preserved. A total of three sporo-pollen groups were established