Twin Creek Limestone
93 distinct taxa, from 676 fossil occurrences the Paleobiology Database records under this name, spanning 175–143 Mya.
Wyoming, Utah, Idaho · US
93 taxa · 676 fossils · 175–143 MyaMembers recorded: Sliderock, Rich, Leeds Creek, Watton Canyon, Boundary Ridge, F, Giraffe Creek, B, C, E, Gypsum Spring.
Macrostrat dates this rock 195–162 Ma. Macrostrat’s own record
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78 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
- Camptonectes
- Myacites (Pleuromya) subcompressa
- Pronoella
- Gryphaea planoconvexa fraterna
- Crinoidea
- Liostrea strigilecula
- Astarte meeki
- Gastropoda
- Trigonia
- Pinna
- Eocephalites primus
- Stemmatoceras
- Grammatodon
- Gryphaea
- Eocephalites
- Trigonia montanaensis
- Megasphaeroceras rotundum
- Ctenostreon
- Plagiostoma
- Plicatula
- Vaugonia
- Quenstedtia
- Camptonectes stygius
- Modiolus
- Pholadomya
- Thracia weedi
- Astarte (Coelastarte) livingstonensis
- Echinoidea
- Gryphaea planoconvexa
- Corbula
- Goniomya
- Mactromya
- Pronoella uintahensis
- Lyosoma powelli
- Protocardia
- Cucullaea (Idonearca)
- Nerinea
- Normannites
- Pholadomya inaequiplicata
- Prorokia fontenellensis
The 40 most often recorded, of 93.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.