Orr Formation
67 distinct taxa, from 207 fossil occurrences the Paleobiology Database records under this name, spanning 497–487 Mya.
Utah, Nevada · US
67 taxa · 207 fossils · 497–487 MyaMembers recorded: Candland Shale, John's Wash, Steamboat Pass Shale, Steamboat Shale, Big Horse Limestone, Sneakover Limestone, Sneakover limestone, Corset Spring Shale, Sneakover, Upper Shale.
Macrostrat dates this rock 501–487 Ma. Macrostrat’s own record
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10 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
- Dunderbergia
- Crepicephalus
- Kingstonia
- Tumicephalus depressus
- Blountia
- Prehousia alata
- Pseudagnostus
- Bromella
- Elburgia
- Prehousia
- Aphelaspis
- Coosella
- Iddingsia
- Strigambitus
- Tricrepicephalus
- Coosina
- Dytremacephalus
- Genevievella
- Homagnostus
- Pterocephalia
- Aphelotoxon
- Cheilocephalus
- Elburgia granulosa
- Housia
- Kindbladia
- Meteoraspis
- Parabolinoides
- Acrotretida
- Aphelaspis haguei
- Dicanthopyge convergens
- Dunderbergia bigranulosa
- Elvinia
- Erixanium
- Lingulida
- Linnarssonella
- Lonchocephalus
- Sigmocheilus
- Strigambitus utahensis
- Aphelotoxon acuminata
- Arcuolimbus
The 40 most often recorded, of 67.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.