Washington Formation
10 distinct taxa, from 12 fossil occurrences the Paleobiology Database records under this name, spanning 307–252 Mya.
Pennsylvania, Ohio, West Virginia · US
10 taxa · 12 fossils · 307–252 MyaFiled under the Dunkard Group. Members recorded: lower, Middle Washington Limestone, Upper Marietta Sandstone.
Macrostrat places this rock in the Dunkard Group, and dates it 300–286 Ma. 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
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.