Pierre Formation
16 distinct taxa, from 18 fossil occurrences the Paleobiology Database records under this name, spanning 84–66 Mya.
South Dakota · US
16 taxa · 18 fossils · 84–66 MyaMacrostrat places this rock in the Montana Group, and dates it 84–71 Ma. Macrostrat’s own record
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3 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
- Baculites ovatus
- Acteon concinnus
- Amauropsis paludinaeformis
- Baculites compressus
- Baculites grandis
- Buccinum vinculum
- Callianassa danai
- Didymoceras nicolletii
- Fusus shumardii
- Inoceramus (Cataceramus) tenuilineatus
- Inoceramus sublaevis
- Lunatia obliquata
- Menuites portlocki complexus
- Platecarpus
- Syncyclonema hallii
- Uluciala rotundata
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.