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GTS 2004- GSSP<br />
Cénozoïque : 10 [reste 10]<br />
Mésozoïque : 11 [reste 22]<br />
Paléozoïque : 28 [reste ±20]<br />
Précambrien : 1 [reste ?]<br />
PREAT A ULB - Conférence Bouillon 7.12.2007<br />
Gradstein et al 2004
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