Richmond Formation
21 distinct taxa, from 25 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.
Michigan, Illinois · US
18 taxa · 21 fossils · 450–443 MyaLoading coastlines…
6 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
- Aulacera
- Sceptropora facula
- Tetradella
- Bythocypris cylindrica
- Calapoecia huronensis
- Calymene
- Catenipora gracilis
- Columnaria alveolata
- Helicelasma rusticum
- Leptobolus insignis
- Lyopora goldfussi
- Orthograptus quadrimucronatus
- Palaeophyllum
- Paleofavosites
- Primitiella
- Rhynchotrema perlamellosum
- Streptelasma divaricans
- Zygospira modesta
St. Mary Parish · JM
3 taxa · 4 fossils · 56–38 MyaMacrostrat dates this rock 68–53 Ma. 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
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.