Stratotype Point Base of Callovian
http://resource.geosciml.org/classifier/ics/ischart/BaseCallovianSP
| label | Stratotype Point Base of Callovian | |||||||
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| ratified GSSP |  |
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| comment | candidates are Pfeffingen (Swabian Alb, SW Germany) and in Russia | |||||||
| correlation event | Ammonite FAD of the genus Kepplerites (Kosmoceratidae) (defines Base of Macrocephalites herveyi Zone in sub-Boreal province of Great Britain to southwest Germany) |
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| type |
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| represents boundary |
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| see also | index.html original | |||||||