Williams Fork Formation
75 distinct taxa, from 85 fossil occurrences the Paleobiology Database records under this name, spanning 84–66 Mya.
Colorado · US
75 taxa · 85 fossils · 84–66 MyaFiled under the Mesaverde Group.
Macrostrat places this rock in the Mesaverde Group, and dates it 101–66 Ma. Macrostrat’s own record
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5 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
- Lepisosteidae
- Teleostei
- Hadrosauridae
- Melvius
- Paralbula casei
- Richardoestesia
- Theropoda
- Tyrannosauridae
- Acanthomorphata
- Acipenseridae
- Actinopterygii
- Adocus
- Albanerpeton
- Albanerpetontidae
- Alligatoroidea
- Amiidae
- Amphibia
- Anguidae
- Anura
- Atractosteus
- Baenidae
- Basilemys
- Belonostomus
- Brachychampsa
- Cantioscyllium
- Caudata
- Ceratopsidae
- Chelydridae
- Chiloscyllium
- Cimolodon nitidus
- Coriops
- Cristomylus
- Crocodylia
- Cyclurus
- Denazinemys
- Dipnoi
- Dromaeosauridae
- Estesesox foxi
- Glasbius piceanus
- Helodermatidae
The 40 most often recorded, of 75.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.