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the Hadean (MichaelBurov); Hadean Eon (MichaelBurov); Hadean (MichaelBurov) | |||
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Hadean (геологическая эра, примерно 4.6-3.8 миллиарда лет назад Rudy) | |||
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Pre-Archean (MichaelBurov) |
гадей : 9 phrases in 3 subjects |
Geochronology | 2 |
Geology | 4 |
Stratigraphy | 3 |