Roberts Mountains Formation
92 distinct taxa, from 198 fossil occurrences the Paleobiology Database records under this name, spanning 427–413 Mya.
Nevada · US
92 taxa · 198 fossils · 427–413 MyaMacrostrat dates this rock 439–415 Ma. Macrostrat’s own record
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5 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
- Gypidula
- Nucleospira
- Atrypa reticularis
- Dalejina subfrequens
- Dicaelosia nitida
- Metaplasia lenzi
- Salopina
- Cyrtina
- Gypidula pelagica lux
- Howellella
- Leptaena
- Ptychopleurella
- Rhynchospirina siemiradzkii
- Salopina submurifer
- Stylopleura berthiaumi
- Tryplasma duncanae
- Atrypina prosimpsoni
- Glassia
- Protospongia
- Schizophoria
- Schizophoria paraprima
- Aenigmastrophia cooperi
- Aesopomum varistriatus
- Alaskospira
- Ancillotoechia
- Atrypa
- Atrypoidea
- Cryptatrypa angusta
- Dolerorthis
- Eoglossinotoechia cacuminata
- Gabelia
- Gabelia pedunculus
- Gracianella
- Icriodus
- Isorthis
- Lissatrypa
- Lyrielasma
- Megakozlowskiella inflectens
- Neomphyma
- Schuchertella
The 40 most often recorded, of 92.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.