Rockdale Run Formation
36 distinct taxa, from 46 fossil occurrences the Paleobiology Database records under this name, spanning 487–457 Mya.
Maryland, Virginia · US
36 taxa · 46 fossils · 487–457 MyaMembers recorded: lower.
Macrostrat places this rock in the Beekmantown Group, and dates it 480–463 Ma. Macrostrat’s own record
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3 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
- Campbelloceras virginianus
- Ceratopea
- Clitendoceras
- Diparelasma
- Escharendoceras
- Euchasma blumenbachi
- Finkelnburgia
- Mcqueenoceras
- Platysiphon
- Proterocameroceras
- Archaeoscyphia
- Centrotarphyceras macdonaldi
- Coreanoceras
- Crinoidea
- Diaphelasma
- Doloresella
- Ecculiomphalus
- Hystricurus
- Lecanospira compacta
- Lesueurilla
- Lichenaria
- Lobosiphon
- Macluritella marylandica
- Mysticoceras
- Ophileta
- Orospira
- Phragmosiphon
- Pliendoceras
- Polytoechia
- Retroclitendoceras
- Rioceras
- Stenosiphon
- Stichotrophia
- Syntrophinella
- Tritoechia
- Xenelasma
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.