سامانه (چینهشناسی)
Sign in to saveidealized composite unit of the geologic record representing the totality of rock strata laid down during a certain period of the geologic time scale
Connections
geologic time scale
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stage
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series
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Wayback Machine
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digital object identifier
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unit of measurement
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Cretaceous
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Paleozoic
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Mesozoic
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Cenozoic
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Carboniferous
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Ordovician
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Quaternary
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stratigraphy
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Proterozoic
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Phanerozoic
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Paleogene
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Neogene
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Miocene
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Eocene
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