| 北京西山宏观藻类化石的发现 |
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| 引用本文： | 萧宗正.北京西山宏观藻类化石的发现[J].地质科学,1990,0(4):403-407. |
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| 作者姓名： | 萧宗正 |
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| 作者单位： | 北京市地质矿产局 |
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| 摘 要： | 1980年,作者于北京西山青白口系的命名地点——青白口村西,发现了宏观藻类化石。这些化石呈椭圆形、卵形、肾形及鞋底形等多种形态,有的带有拟茎构造。它们与广泛出现在我国东部前寒武系相当地层中的宏观藻类可以对比。
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| 关 键 词： | 北京西山 青白口系 宏观藻类化石 |
| 收稿时间： | 1989-01-01 |
| 修稿时间： | 1989-01-01; |
DISCOVERY OF MACROSCOPIC ALGAE-CHUARIDS ON WEST HILLS NEAR BEIJING CITY |
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| Xiao Zongzheng.DISCOVERY OF MACROSCOPIC ALGAE-CHUARIDS ON WEST HILLS NEAR BEIJING CITY[J].Chinese Journal of Geology,1990,0(4):403-407. |
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| Authors: | Xiao Zongzheng |
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| Institution: | Bureau of Geology and Mineral Resources of Beijing Municipality |
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| Abstract: | Since 1962, a large number of Chuarids have been found in the Precambrian system in China. The author has also found the large individuals of Chuarids in the middle part of Changlongshan formation on West Hills near Beijing city in 1980, where the Qingbaikou system occurrsed. These Chuarids of various kinds, which are small and circular carbonaceous fossils, have attracted many attentions.These macroscopic algae-chuarids are similar to those in the Precambrian systems in Hebei and Anhui provinces in their size, shape and structure. They are described as follows.1. Shouhsienia cf. axicula Zheng; 2. Longfengshania qingbaikouensis Xiao (sp. nov.); 3. L Stipitata Du; 4. Pumilibaxa cf. huaiheiana Zheng; 5. Nephroformia sp.;The Chuarids found at West Hills near Beijing are characterized by the following features:1.The Fossils are predominantly composed of black carbonaceous membranes, and su-bordinately brown limonitic membranes.2.The individuals of them are bigger than those in Hebei and Anhui.3.The fossils varies in shapes, and some of them have parastem and rhizoid structure. |
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| Keywords: | Beijing The Qingbaikou system macroscopic algae-chuarids |
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