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Locality
Black Knob Ridge Section
NameBlack Knob Ridge Section
Typeoutcrop
CountryUnited States
Coordinates34.427522, -96.067717
Location remarksOklahoma kaguosas 5 km Atoka linnast põhja pool. Koordiaadid artiklist Goldman et al., 2007
RemarksThe global stratotype-section and point (GSSP) for the base of Katian Stage of the Upper Ordovician series
Date added2011-10-19
Date changed2012-06-13
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