| 论棋梓桥灰岩 |
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| 引用本文： | 谭正修
,董振常
,唐晓珊.论棋梓桥灰岩[J].地层学杂志,1987(2). |
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| 作者姓名： | 谭正修 董振常 唐晓珊 |
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| 摘 要： | <正> 棋梓桥灰岩系田奇瑞等(1933)所创,标准地点在湘乡县棋梓桥镇万罗山,为一套连续沉积的碳酸盐岩,当时时代定为中泥盆世。嗣后,田奇瑞(1938)建立了棋梓桥系,由上而下包括棋梓桥灰岩和易家湾页岩,仍归属中泥盆统。潘江(1958)认为棋梓桥灰岩和易家湾页岩是同期异相沉积,王钰等(1962)和赵汝旋等(1978)同意这一观点,总称二者为棋梓桥组。在1:20万区域地质调查中,将田奇瑞等原义的“上跳马涧系”划归棋梓桥组,跳马涧组专指“下跳马涧系”。棋梓桥组在横向上包括不同相区的不同类型沉积,在纵向上包括岩相、岩性差异显著的上、下两部分。在区域地质调查中,一般称下部为“棋梓桥组泥灰
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The Qiaiqiao Limestone |
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| Abstract: | The Qiziqiao (Chitzechiao) limestone widly disributed in Hunan is a diachronous lithostratigraphic unit. It extends from the Donggangling stage to the top of Shetianqiao stage in stratigraphic range. Its upper boundary lies below the Shetianqiao stage in the typical section located in Qiziqiao of Xiangxiang, Hunan. It is possibly changed into the Shale, Dinghechong, Xinshao, Longkouchong formations and "Shetianqiao bed" in the horizontal direction. Sinodisphyllum and Pseudozaphrentis occur in the late middle Devonian rather than the early upper Devonian. The Grypophyllum mackenziense zone is regarded as belonging to the middle Devonian. |
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