Country:
|
USA
|
Province:
|
Iowa (undifferentiated)
|
Locality:
|
Bird Hill near Rockford
|
Layer:
|
Cerro Gordo Fm. |
Lower Boundary:
|
Givetian--Frasnian [GIV--FRS], 385.3 million years
|
Upper Boundary:
|
UD2A--UD2B:(verneuili Zone base) [07,75], 374 million years
|
Georeference:
|
|