Hepburn's Mesa Formation
28 distinct taxa, from 48 fossil occurrences the Paleobiology Database records under this name, spanning 23–5.3 Mya.
Montana · US
28 taxa · 48 fossils · 23–5.3 MyaMembers recorded: Unit 16, Unit 23, Unit 4, Unit 11.
Macrostrat dates this rock 23–5.3 Ma. Macrostrat’s own record
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1 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
- Mioheteromyinae
- Archaeolaginae
- Blastomerycinae
- Copemys
- Cupidinimus
- Equinae
- Geomyoidea
- Lignimus
- Marmotini
- Mojavemys
- Mylagaulidae
- Oreolagus
- Perognathinae
- Petauristodon
- Pseudotheridomys
- Spermophilus
- Tardontia
- Zapodidae
- Ansomys hepburnensis
- Camelidae
- Dromomeryx
- Equidae
- Hypohippus
- Leptodontomys
- Merycodontinae
- Mesogaulus
- Mesoscalops
- Scalopoides
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.