| 云南晋宁梅树村阶及梅树村动物群 |
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| THE MEISHUCUN STAGE AND FAUNA OF THE JINNING COUNTY,YUNNAN |
| Both the Meishucun and Wangjiawan section in Jinning county, Yunnanprovince, represent a stratigraphically continuous section of marine depositscontaining abundant small shelly fossils. These section are readily accessibleand ideal for studying the Precambrian-cambrian boundary as comparedwith those both at home and abroad. The Meishucun stage is the lowest stageof the early Cambrian in China. It represents a smally shelly fossil assemblage-bearing stratigraphic unit below the first appearance of the oldest trilobites and archaeostracods. The Meishucun section is the stratotype for the Meishucon stage. Small shelly fossils in the Meishucun section have been studied since 1941. According to the systimatic study of data obtained from continuous channel sampling of the section, the small shelly fossils can be divided into three assemblages and six sub-assemblages. The characteristics of the changes of these fossil assemblages from bottom to top clearly reflects the evolution of small shelly faunas from lower grade to higher grade and from simple to complicated form. The forst 3 sub-asssemblages of the first assemblage are Pre-Tommotain. The Meishucun stage and fauna are widely correlatable with those both at home and abroad. This paper deals with(1)the characteristics of the Meishucun faunal assenblages and their correlation with those found in other parts of the country and in the world; (2)It is suggested that the boundary between the Precambrain and Cambrain in China Should be placed at the bottom of the Meishucun stage, and (3)descriptions and illustrations of new genera and species. |
| JIANG Zhi-wen.1980.THE MEISHUCUN STAGE AND FAUNA OF THE JINNING COUNTY,YUNNAN[J].Acta Geoscientica Sinica,2(1):75-92. |
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