Correlation of the Silurian Rocks of China

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Abstract
This paper is a comprehensive compilation of information relevant to the correlation of the Chinese Silurian rocks by means both of fossils and physical data available through 1980. The number of units reflects the large area of China underlain by Silurian rocks, and the varied environmental regimes affecting their deposition. For correlation, both graptolites and brachiopods have been used most extensively, but other groups have contributed significantly from place to place. The paleogeography and lithofacies relations of the Chinese Silurian have also been considered in broad view. Shelf deposits dominate the Central China (Yangtze) Plat-form, and they represent the best developed, most complete, and most extensive sequence of Llandovery graptolites known anywhere in the world. Evidence for sea-level changes during the Silurian is reviewed, and the absence of orogeny is noted. Volcanism is important in the north, but essentially absent elsewhere. We have provided more data concerning the lithology and fossil content of the Chinese Silurian rocks than in the other Silurian correlation charts because the Chinese data are far less accessible to westerners than the data for the previously published charts. In the Silurian correlation chart there are 102 columns falling into five major stratigraphic regions. In northern China, there are 29 columns in the Junggar-Hinggan (northernmost China) region, 5 in the northwest China region, and no Silurian deposits in the Huanghe (N. China) region. In southern China, there are 11 in the Xizang - W. Yunnan region, 51 in the Yangtze (Central China) region, and 6 in the Zhujiang (S. China) region. There are 144 stratigraphic units described and nearly 200 references provided.

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