The Central Guizhou and Yi- chang uplifts, Upper Yangtze region, between Ordovician and Silurian

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The Central Guizhou and Yichang Uplifts are present in central Guizhou to western Hubei. Biostrati-graphic evidences from more than 20 sections in 14 counties of this region provide the data about the duration of these uplifts. Although this duration diff
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