Willwood Formation
576 distinct taxa, from 7,346 fossil occurrences the Paleobiology Database records under this name, spanning 59–46 Mya.
Wyoming · US
576 taxa · 7,346 fossils · 59–46 MyaMembers recorded: Sand Creek Facies, Wa-1 Zone, Sand Coulee beds, "Gray Bull" beds.
Macrostrat dates this rock 54–49 Ma. Macrostrat’s own record
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58 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
- Sifrhippus grangeri
- Diacodexis metsiacus
- Dicotyledoneae
- Homogalax protapirinus
- Hyopsodus loomisi
- Esthonyx bisulcatus
- Arenahippus aemulor
- Haplomylus speirianus
- Arenahippus pernix
- Ectocion osbornianus
- Viverravus acutus
- Phenacodus vortmani
- Coryphodon
- Cantius mckennai
- Phenacodus intermedius
- Didymictis protenus
- Coryphodon eocaenus
- Hyopsodus
- Cantius abditus
- Allognathosuchus
- Cardiolophus radinskyi
- Crocodylia
- Thryptacodon antiquus
- Rodentia
- Paramys copei
- Arfia shoshoniensis
- Bunophorus etsagicus
- Lepisosteus
- Esthonyx spatularius
- Diacodexis
- Hyopsodus simplex
- Vulpavus australis
- Apheliscus chydaeus
- Haplomylus scottianus
- Alnus
- Tetonius matthewi
- Lacertilia
- Didymictis leptomylus
- Testudines
- Glyptostrobus europaeus
The 40 most often recorded, of 576.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.