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Geology
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NEWFOUNDLAND
CONODONT IAPETOGNATHUS
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GRAPTOLITE
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GREEN POINT
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GSSP
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JILIN-PROVINCE
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SEA-LEVEL
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STRATIGRAPHY
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Geography
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Precambrian-Cambrian boundary
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Yangtze Platform
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early bilaterian lifestyles
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ichnoguilds
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