Shell Rock Formation
57 distinct taxa, from 195 fossil occurrences the Paleobiology Database records under this name, spanning 382–372 Mya.
Iowa · US
57 taxa · 195 fossils · 382–372 MyaFiled under the Cedar Valley Group. Members recorded: Mason City, Nora, Rock Grove.
Macrostrat places this rock in the Cedar Valley Group. Macrostrat’s own record
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12 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
- Productella
- Strophomena (Strophodonta)
- Cranaena
- Spinocyrtia
- Pseudoatrypa devoniana
- Paracyclas elliptica
- Schizophoria
- Athyris
- Strophodonta (Strophodonta)
- Pachyphyllum
- Paracyclas dubia
- Allanella
- Cyrtina
- Douvillina
- Floweria
- Petrocrania famelica
- Platyrachella
- Schuchertella
- Spinatrypina
- Syringostroma
- Tenticospirifer shellrockensis
- Actinostroma
- Atelodictyon
- Atribonium nora
- Cariniferella
- Disphyllum conjugans
- Douvillina arcuata
- Gypidula
- Hypothyridina
- Lorangerella
- Nantanella mapingensis
- Nervostrophia
- Stictostroma
- Strophalosia
- Tabulophyllum
- Tylothyris
- Amphipora
- Clathrocoilona
- Disphyllum
- Disphyllum iowensis
The 40 most often recorded, of 57.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.