experimental
Entry: Base of Middle Ordovician
URI: https://data.geoscience.fr/ncl/GeolTsBound/1047
no description supplied
Definition
alt label |
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category |
geology
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has tRS |
Million d'années
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in scheme |
Chronostratigraphical / geochronological boundaries
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label |
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nature |
Référent
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numeric position |
470
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pref label |
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source |
ICS2020-01
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spatial |
Monde
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type |
Concept
| geochronologic boundary
| era boundary
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