Potential global standard stratotype-sections (GSSPs) at Luoyixi, NW Hunan and Duibian,W Zhejiang,South China for undefined Cambrian stage 7 and Cambrian stage 9

Lower Cambrian in the North China is of grey-purplish red-grey-purplish red stratigraphic sequences,which indicate two normal-evaporation sedimentary cycles.The lower Cambrian is subdivided into four rock-stratigraphic formations of Xinji Formation,Zhushadong Formation,Changping Formation,Mantou Formation and three trilobite zones of Husaspis、Megapalaeolenus fengyangensis and Redlichia chinesisupward,which are respectively correlated into Qiongzhusi Stage,early Canglangpu Stage,late Canglangpu Stage and Longwangmiao Stage.The paleogeographic framework is of higher altitude in the northwestern and lower altitude in the southeastern of the North China Platform in early Cambrian.The transgression sediments successively overlapped central-ward and north-ward,and it covered the most areas of the North China in late stage of early Cambrian.The lower Cambrian sedimentary sequences and fossil communities in Jilin and Liaoning Provinces of the northeastern North China Platform are similar to those in Jiangsu,Anhui,Henan and Shandong Provinces of the southeastern North China Platform.Therefore,Jilin and Liaoning Provinces probably located in the southern of North China in early Cambrian,and left-laterally displaced north-ward in late Triassic and early Cretaceous by the Tangcheng—Lujiang Fault Zone.

Marine transgression

Trilobite

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Upper Middle Cambrian trilobites from the Drepanura Zone of the Gushan Formation,Shandong Province,China

문상준

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Cambrian stratigraphy at Wangcun, Hunan Province, China：stratotypes for bases of the Wangcunian and Youshuian stages

Shanchi Peng E Babcock Lin Huanling Chen Yongan Xuejian Zhu

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Trilobites from the Middle Cambrian Hsuchuangian stage of Zhangxia, Changqing County, Shandong Province

Gu Sheng wu xue bao = Acta Palaeontologica Sinica (2001)

Lu Yanhao Zhu Zhao-ling

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PRECAMBRIAN-CAMBRIAN BOUNDARY SECTION AT MEISHUCUN,YUNNAN,CHINA

L Uyang Iu G F Geology

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Neoproterozoic-Cambrian transition of the South China Plate and Cambrian of the North China Plate in Shaanxi Province: an introduction

Li Guoxiang Michael Steiner Hong Hua Luo Kun-li

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Jy Chen Yy Qian Jm Zhang Yk Lin Lm Yin

Stratotype

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A TRILOBITE FAUNA FROM THE CAMBRIAN QINJIAMIAO GROUP IN XINGSHAN,HUBEI PROVINCE AND ITS STRATIGRAPHICAL SIGNIFICANCE

Dicengxue zazhi (2009)

Yuan Xin-peng

The Qinjiamiao Group in the Yangtze Gorge area is mainly composed of thin-bedded dolostones.Because this group yields scarce fossils,its depositional age was poorly constrained.New trilobites(e.g.,Kaotaia gedongensis Yuan Zhao,Kunmingaspis yunnanensis Chang,Chittidilla sp.)collected from the basal Qinjiamiao Group at Gudongkou,Xingshan County of Hubei Province provide reliable evidence for a Cambrian age.Based on lithostratigraphical and biostratigraphical correlations among different sections in the Yangtze Block,we concluded that the basal Qinjiamiao Group in the Yangtze Gorge area was deposited in the traditional Early Cambrian and Middle Cambrian.

Trilobite

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Sinian-Cambrian stratigraphy at Wuhe, Taijiang County, Guizhou Province, China：interval from the Neoproterozoic tillite to the Upper Cambrian dolostone

Zhu Maoyan Junming Zhang Zhao Yuanlong Yang Ai-hua Tai Tongshu

Dolostone

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