http://resource.geosciml.org/classifier/ics/ischart/BaseKatianSP
ratified GSSP | ![]() |
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boundary level | 4.0m above the Base of the Bigfork Chert | |||||||
comment | Black Knob Ridge Section, Atoka, Oklahoma (USA) | |||||||
correlation event | Graptolite FAD Diplacanthograptus caudatus | |||||||
dc source | Episodes 30/4, p.258 270, 2007 | |||||||
see also |
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status | Ratified 2006 | |||||||
type |
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shape | Location of Stratotype Point Base of Katian original |