Mifflin Formation
152 distinct taxa, from 181 fossil occurrences the Paleobiology Database records under this name, spanning 457–450 Mya.
Illinois, Iowa, Illinois, Iowa, Wisconsin, Iowa/Wisconsin, Iowa, Wisconsin, Illinois · US
152 taxa · 181 fossils · 457–450 MyaFiled under the Platteville Group.
Macrostrat places this rock in the Platteville Group, and dates it 457 Ma. Macrostrat’s own record
Loading coastlines…
5 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Actinoceras
- Zittelloceras
- Beloitoceras
- Ceraurinella
- Basilicus (Basiliella)
- Bathyurus (Raymondites) longispinus
- Bumastus (Bumastoides) milleri
- Centrocyrtoceras
- Ceraurinella scofieldi
- Ectomaria prisca
- Gabriceraurus
- Illaenus
- Isotelus simplex
- Kentlandoceras
- Metaspyroceras
- Michelinoceras
- Plectoceras
- Reteocrinus
- Sceptaspis lincolnensis
- Spyroceras
- Tripteroceras
- Whitfieldoceras
- Abludoglyptocrinus charltoni
- Acanthocrania
- Acanthocrania setigera
- Alaskadiscus subacutus
- Allumettoceras
- Ambonychiopsis
- Amphilichas
- Amplexopora
- Antiplectoceras
- Beloitoceras huronense
- Beloitoceras pandion
- Bothriocidaris
- Bucania halli
- Bucania sublata
- Calyptaulax
- Campylorthis deflecta
- Cataschisma convexum
- Chidleyenoceras
The 40 most often recorded, of 152.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.