Arco Hills Formation
20 distinct taxa, from 37 fossil occurrences the Paleobiology Database records under this name, spanning 330–323 Mya.
Idaho · US
20 taxa · 37 fossils · 330–323 MyaMacrostrat dates this rock 327–325 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
- Composita sigma
- Anthracospirifer arcoensis
- Anthracospirifer leidyi
- Anthracospirifer occiduus
- Composita idahoensis
- Composita subquadrata
- Orbiculoidea wyomingensis
- Schizophoria depressa
- Schizophoria resupinata
- Cleiothyridina sublamellosa
- Diaphragmus nivosus
- Eolissochonetes pseudoliratus
- Flexaria
- Inflatia
- Leiorhynchoidea
- Pugnoides quinqueplecis
- Punctospirifer transversus
- Schuchertella
- Torynifer
- Werriea australis
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.