Usa Formation
253 distinct taxa, from 1,555 fossil occurrences the Paleobiology Database records under this name, spanning 521–508 Mya.
Kemorovo, Khakasiya · RU
253 taxa · 1,555 fossils · 521–508 MyaMembers recorded: Unit XI, Unit VIII, Unit XIV, Unit XII, Unit X, Unit VI, Unit IX, Unit XIII, Unit VII, Sanashtykgol, Unit XV/2, Kameshki.
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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
- Nochoroicyathus
- Archaeolynthus
- Tumuliolynthus
- Capsulocyathus
- Rotundocyathus
- Dictyocyathus
- Cambrocyathellus
- Tumulocyathus
- Dokidocyathus
- Erismacoscinus
- Irinaecyathus
- Fransuasaecyathus
- Baikalocyathus
- Taylorcyathus
- Clathricoscinus
- Loculicyathus
- Plicocyathus
- Sibirecyathus
- Coscinocyathella
- Epiphyton
- Degeletticyathus
- Formosocyathus
- Orbicyathus
- Agyrekocyathus
- Inessocyathus
- Coscinocyathus
- Gordonicyathus
- Szecyathus
- Ladaecyathus
- Thalamocyathus
- Archaeocyathina
- Leptosocyathus
- Nochoroicyathus fragilis
- Ajacicyathida
- Alataucyathus
- Archaeocyathus
- Dokidocyathus bogradiensis
- Kaltatocyathus
- Carinacyathus
- Renalcis
The 40 most often recorded, of 253.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.