| 河南济源晚三叠世—中侏罗世陆相地层 |
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| 引用本文： | 胡斌.河南济源晚三叠世—中侏罗世陆相地层[J].地层学杂志,1991,15(1):48-52. |
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| 作者姓名： | 胡斌 |
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| 摘 要： | <正> 河南济源西承留一带晚三叠世—中侏罗世地层分布广泛、出露良好,化石丰富。60年代,河南省地质局石油队和区测队等做过区测工作,建立了地层系统。1979至1985年,笔者等在“河南省中生代含煤地层及找煤方向”课题研究时,研究地层的岩性及化石群特征,将本区晚三叠世—中侏罗世地层自下而上分为椿树腰组(T_(3ch)~1)、谭庄组(T_(3t)~2)、鞍腰组(J_(1a))、杨树庄组(J_(2y))和马凹组(J_(2m)),分述如下:
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| 关 键 词： | 地层 古植物 晚三叠世 中侏罗世 |
Late Triassic-Middle Jurassic continental strata ot Jiyuan, Henan |
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| Abstract: | The Late Triassic and Middle Jurassic continental strata well exposed in Jiyuan, Henan may be'ascendingly divided into the five stratigraphic units: 1.Chunshuyao Formation of the Upper Triassic is composed mainly of river deposits intercalated with lacustrine sediments and contains o?plant Danaeopsis-Bernoullia flora and bivalve Shaanxiconcha elliptica, S.yenchuanensis', 2.Tanzhuang Formation consists of the lacustrine and fluvial sediments containing oil shales and coal seams, and Danaeopsis-Bernoullia flora as well as Shaanxiconcha faunaj 3.Lower Jurassic Anyao Formation is characterized by lacustrine turbidite associated with Palaeodictyon, Protopalaeodictyon, Tubercuichnus, Chondrites and Gramtlaria; 4.Yangshuzhuang Formation(early Middle Jurassic)consists chiefly of the sandstone, siltstone and mudstone including Coniopteris-Phoenicopsis flora and bivalve Yananoconcha 5.Maao Formation (late Middle Jurassic) is made up of lower alluvial deposits (mostly sandstone) and the upper lacustrine limy mudstone and intercalation of marl associated with Psilunio, Lamprotulo (Eolatnprotula), Cuneopsis, Estheria (Eueslheria). |
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