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Scheme: ABCD EFG Pencil.png
Collection: EFG UnitHostRock Pencil.png
The import namespace "abcd-efg" is unknown. Please ensure that OWL import details are available via MediaWiki:Smw import abcd-efg
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HostRockStratigraphy-PolarityChron (also /UnitHostRock/HostRockStratigraphy/MagnetostratigraphicDeterminations/MagnetostratigraphicDetermination/PolarityChron): Reference to numerical scheme for labelling time divisions based on magnetic anomalies and reversals

Constraints in the context of ABCD EFG: