millions of years ago and representative formation

Datatype: text
Allowed values:
352 lower Pierson 0
351 upper Pierson 0
350 lower Reeds Spring 0
349 upper Reeds Spring 0
348-347 lower Elsey 0
346 upper Elsey 0
345 Keokuk 0
Created by: ozarkpoppy ozarkpoppy
Values:

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