Nachusa Formation
129 distinct taxa, from 157 fossil occurrences the Paleobiology Database records under this name, spanning 457–450 Mya.
Illinois, Iowa, Illinois, Iowa, Wisconsin · US
129 taxa · 157 fossils · 457–450 MyaMacrostrat places this rock in the Platteville Group. Macrostrat’s own record
Loading coastlines…
2 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
- Beloitoceras
- Richardsonoceras
- Actinoceras
- Tripteroceras
- Allumettoceras
- Cameroceras
- Diestoceras
- Gonioceras
- Kentlandoceras
- Metaspyroceras
- Michelinoceras
- Oncoceras
- Plectoceras
- Porocrinus
- Whitfieldoceras
- Abludoglyptocrinus charltoni
- Acanthocrania
- Acanthocrania setigera
- Alaskadiscus subacutus
- Ambonychiopsis
- Amphilichas
- Antiplectoceras
- Anulocrinus
- Archinacella deleta
- Basilicus (Basiliella)
- Bathyurus (Raymondites) longispinus
- Beloitoceras huronense
- Beloitoceras pandion
- Beloitoceras plebeium
- Bucania halli
- Bucania sublata
- Bumastus (Bumastoides) milleri
- Campylorthis deflecta
- Centrocyrtoceras
- Ceraurinella
- Ceraurinella scofieldi
- Chidleyenoceras
- Clathrospira conica
- Clathrospira subconica
- Cleionychia
The 40 most often recorded, of 129.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.