Title: THE DEVONIAN STRATIGRAPHY OF THE TZELISHIHMEN AREA, NORTH-WESTERN HUNAN
Abstract: The Devonian Rocks in Tzeli-Shihmen Area, N. W. Hunan, may be grouped into threedivisions, the Yuntaikuan quartzose sandstone of the lower and middle Devonian. the Huangia-dang Series and Hsiehkingssu Series of the upper Devonian, The sections dealt with in the presentpaper were made by the writers during their geological excursion in 1958, the Devonian of theseareas have never been found since then. In this paper the subdivisions of the Devonian strata inthe discending order are summarized as follows: (1) The Yuntaikuan quartzose sandstone: It lies disconformably upon the upper SilurianShamao Series. Total thickness ranges from 60--120m. (2) The Huangiadang Series: Th Huangiadang Series is composed of greyish-green thick-bedded sandstone and light grey of whitish grey micaceous shale and banded quartzose sandstone,intercalated with iron-oolitic beds. Plant remains as Dicranophyton sp., Taenoicarda sp. and Lin-gula sp. are found. This Series is conformable with both the Yuntaikuan quartzose sandstone below and the Hsienkingssu Series above. Thickness about 8--10 m. (3) The Hisehkingssu Series: The Hsiehkingssu Series is estimated about 5--60 metersin thickness. This Series lies disconformably under the lower Permian Chihsia limestone, and ismainly of thin-bedded and argillaceous limestone intercalated with shale layers fossils such as,Yunnanella synplicata Grabau, bryoson and pelesy etc. are found, indicating a late upper Devonianage. The Hsiehkingssu Series, as a whole, may be correlated with Hsikuangshan Series in centralHunan. As well known to the Chinese geologists the Ninghsiang-type iron ore bearing strata widelyspread in South China. The iron-oolitic bed of the Huangiadang Series formerly considered tobe of the lower Carboniferous age, is hereby with its marine Devonian fossils belived to belong tothe Ninghsiang iron bearing strata of upper Devonian.
Publication Year: 1959
Publication Date: 1959-01-01
Language: en
Type: article
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