Twin Mountains Formation
56 distinct taxa, from 64 fossil occurrences the Paleobiology Database records under this name.
The Paleobiology Database files this name in 2 countries. That can be one body of rock crossing a border, or two rocks that happen to share a name. The database does not say which, so nothing below is added across them.
Texas · US
49 taxa · 57 fossils · 120–113 MyaFiled under the Trinity Group.
Macrostrat places this rock in the Trinity Group. Macrostrat’s own record
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8 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
- Dinosauria
- Dromaeosauridae
- Lepidotes
- Parvodus parvidens
- Testudines
- Theropoda
- Acrocanthosaurus atokensis
- Amiiformes
- Anguidae
- Anura
- Astroconodon denisoni
- Bernissartia
- Brontopodus birdi
- Ceratodus
- Coelodus
- Convolosaurus marri
- Crocodylia
- Crocodyliformes
- Discoglossidae
- Dromaeosaurinae
- Enchodus
- Frenelopsis ramosissima
- Gobiates
- Grallatoridae
- Iguanodontidae
- Lacertilia
- Lonchidion anitae
- Macrepistius
- Melvius
- Mesoeucrocodylia
- Naomichelys
- Ophiopsis
- Osteichthyes
- Ostreidae
- Palaeobalistum
- Palaeobalistum geiseri
- Paluxysuchus newmani
- Paramicrodon estesi
- Pholidosauridae
- Proscinetes
The 40 most often recorded, of 49.
Alberta · CA
7 taxa · 7 fossils · 72–66 MyaLoading 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
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.