Spechts Ferry Member
Geology
Formation: Decorah
Lithologies: claystone (1), "shale" (1)
Paleoenvironments: marine indet. (1), carbonate indet. (1)
Age range: Turinian or 457.30000 to 453.80000 Ma
Collections
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Turinian | USA (Missouri) | (175724) | |
Blackriveran - Rocklandian | USA (Illinois, Iowa) | (23454 23621 23795) | |
Blackriveran - Rocklandian | USA (Illinois, Iowa, Wisconsin) | (23761) | |
Rocklandian | USA (Iowa) | (23203) | |
Rocklandian | USA (Iowa/Wisconsin) | (23117) | |
Rocklandian | USA (Minnesota) | (23393 167573) | |
Rocklandian | USA (Minnesota, Iowa, Wisconsin, Illinois) | (23311) |