Lexicon
Intervals
Macrostrat
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Severodvinian
1781
Type
Age
Age range
264.28–259.55
Ma
International Timescale
Lopingian
Wuchiapingian
Guadalupian
Capitanian
Wordian
Russian Platform Regional Stages
Vyatkian
Severodvinian
Urzhumian
Russian Stages
Vyatkian
Severodvinian
Urzhumian
264.4
264.2
264.0
263.8
263.6
263.4
263.2
263.0
262.8
262.6
262.4
262.2
262.0
261.8
261.6
261.4
261.2
261.0
260.8
260.6
260.4
260.2
260.0
259.8
259.6
259.4
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