Mason River Formation
38 distinct taxa, from 1,443 fossil occurrences the Paleobiology Database records under this name, spanning 84–66 Mya.
Northwest Territories · CA
38 taxa · 1,443 fossils · 84–66 MyaMacrostrat places this rock in the Amundsen Gulf Group, and dates it 75–66 Ma. Macrostrat’s own record
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2 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
- Hemiaulus
- Stephanopyxis
- Trinacria
- Pterotheca
- Costopyxis
- Actinoptychus
- Bacillariophyceae
- Goniothecium
- Paralia sulcata
- Aulacodiscus septus
- Stephanopyxis turris
- Stellarima
- Trochosiropsis
- Odontotropis
- Pseudopyxilla
- Sceptroneis
- Thalassiosiropsis
- Hemiaulus polymorphus
- Corinna
- Stephanopyxis simonseni
- Sheshukovia
- Anaulus
- Proboscia
- Triceratium
- Eunotogramma
- Pseudopodosira
- Raphoneis
- Strelnikovia
- Aulacodiscus
- Paralia
- Basilicostephanus
- Coscinodiscus
- Melosira
- Biddulphia
- Chatangiella
- Fromea fragilis
- Hesperornis
- Laciniadinium
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.