Fort Crittenden Formation
32 distinct taxa, from 59 fossil occurrences the Paleobiology Database records under this name, spanning 84–72 Mya.
Arizona · US
32 taxa · 59 fossils · 84–72 MyaMembers recorded: "shale".
Macrostrat places this rock in the Sonoita Group. Macrostrat’s own record
Loading coastlines…
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
- Viviparus
- Hadrosauridae
- Physa
- Plastomenus
- Trionychinae
- Unio
- Adocus
- Amiidae
- Carnosauria
- Crittendenceratops krzyzanowskii
- Elliptio (Plesielliptio)
- Elopidae
- Gastropoda
- Melvius
- Protelliptio
- Pycnodontidae
- Trionychidae
- Tyrannosauridae
- Aclistochara bransoni
- Alligatoridae
- Alligatoroidea
- Crocodylia
- Culicidae
- Cypridopsis
- Gyraulus
- Insecta
- Lepidotes
- Lepisosteidae
- Lepisosteus
- Lepisosteus occidentalis
- Pachyrhizodus
- Palaeolabrus
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.