Ojinaga Formation
The Ojinaga Formation is a Mesozoic geologic formation. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.
Vertebrate paleofauna
- ''Tylosaurus cf. (kansasensis) nepaeolicus''
Invertebrate paleofauna
- Inoceramus sp.
- Globochaete alpina
- Favusella iltermanne
- Hedbergella sp.
- Sacoccoma sp.
- Rotalipora sp.
- Heterohelix sp.
- Leoblichaella cf. bentonensis
- Clavihedbergella sp.
- Mammites nodosides
- Collignomiceras chispaense
- Pryonocycloceras gabrielensis
- Texanites stangeri
- Texanites densicostatus
- Submortoniceras tequesquitense
- Inoceramus undulatuplicatus
- Placenticeras planum
- Eutrephoceras dekayi
- Eutrephoceras alcesense
- Baculites sp.
- Exogyra poderosa
- ''Exogyra erraticostata''