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Intervals
Macrostrat
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Palmatolepis hassi
620
Type
Zone
Age range
379–376.5
Ma
International Timescale
Late Devonian
Frasnian
Conodont Zonation
Palmatolepis rhenana
Palmatolepis hassi
Palmatolepis punctata
379.0
378.8
378.6
378.4
378.2
378.0
377.8
377.6
377.4
377.2
377.0
376.8
376.6
376.4
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