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| 湖北东岳地区位于豫、鄂两省交界处,西靠陕西(图1)。构造位置处于东秦岭中部地区。区内下、中寒武统剖面连续,出露良好,尤其是中寒武统地层分布广泛,为一套不纯的碳酸盐岩沉积。 |
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| THE DISCOVERY AND ENVIRONMENTAL AND TECTONOPALAEOGEOGRAPHIC IMPLICATIONS OF THE MIDDLE CAMBRIAN ALGAL FOSSILS IN THE DONGYUE DISTRICT,HUBEI |
| Cai Xiongfei, Lei Zhaochun, Qiao Guangmu |
| (China University of Geosciences, Wuhan) |
| Abstract: |
| For the first time this paper describes cryptalgalaminates which occur in substantial amounts in non-fossiliferous Middle Cambrian carbonate rocks from the Dongyue district, Hubei. These cryptalgalaminates of different ages and diverse morphologies are closely related with sedimentary environments, thus may be interpreted as a good facies indicator. The discovery of the cryptalgalaminates helps dispel the misunderstanding that the Middle Cambrian strata in the study area are ascribed to the deeper-water sediments, and contributes to the study of the tectono-palaeogeographic changes in the Qinling area during Middle Cambrian time. |
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