Grand Detour Formation
145 distinct taxa, from 192 fossil occurrences the Paleobiology Database records under this name, spanning 457–450 Mya.
Illinois, Iowa, Illinois, Iowa, Wisconsin, Iowa/Wisconsin, illinois · US
145 taxa · 192 fossils · 457–450 MyaFiled under the Platteville Group. Members recorded: Wallgreen, Forreston.
Macrostrat places this rock in the Platteville Group. Macrostrat’s own record
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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
- Beloitoceras
- Zittelloceras
- Richardsonoceras
- Actinoceras
- Ceraurinella
- Porocrinus
- Abludoglyptocrinus charltoni
- Allumettoceras
- Amphilichas
- Basilicus (Basiliella)
- Bathyurus (Raymondites) longispinus
- Bumastus (Bumastoides) milleri
- Cameroceras
- Cremacrinus
- Diestoceras
- Gabriceraurus
- Gonioceras
- Helicotoma planulata
- Illaenus
- Isotelus simplex
- Metaspyroceras
- Michelinoceras
- Plectoceras
- Reteocrinus
- Rhaphanocrinus
- Sceptaspis lincolnensis
- Thaleops ovata
- Tripteroceras
- Acanthocrania
- Acanthocrania setigera
- Alaskadiscus subacutus
- Ambonychiopsis
- Anapliomera
- Antiplectoceras
- Anulocrinus
- Archinacella deleta
- Beloitoceras huronense
- Beloitoceras pandion
- Beloitoceras plebeium
- Bothriocidaris
The 40 most often recorded, of 145.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.