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Cambrian
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==== Terreneuvian ==== The [[Terreneuvian]] is the lowermost series/[[Geologic time scale|epoch]] of the Cambrian, lasting from 538.8 Β± 0.6 Ma to c. 521 Ma. It is divided into two stages: the [[Fortunian]] stage, 538.8 Β± 0.6 Ma to c. 529 Ma; and the unnamed Stage 2, c. 529 Ma to c. 521 Ma.<ref name="ICS" /> The name Terreneuvian was ratified by the [[International Union of Geological Sciences]] (IUGS) in 2007, replacing the previous "Cambrian Series 1". The GSSP defining its base is at Fortune Head on the Burin Peninsula, eastern Newfoundland, Canada (see Ediacaran - Cambrian boundary above). The Terreneuvian is the only series in the Cambrian to contain no trilobite fossils. Its lower part is characterised by complex, sediment-penetrating Phanerozoic-type [[trace fossil]]s, and its upper part by small shelly fossils.<ref name="Peng-2020" />
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