Pen Formation
5 distinct taxa, from 5 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
4 taxa · 4 fossils · 86–72 MyaFiled under the Terlingua Group. Members recorded: McKinney Springs Tongue.
Macrostrat places this rock in the Terlingua Group, and dates it 87–84 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
Coahuila · MX
1 taxa · 1 fossils · 84–72 MyaFiled under the Terlingua Group.
Macrostrat places this rock in the Terlingua Group, and dates it 87–84 Ma. Macrostrat’s own record
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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.