Cummingsville Formation
228 distinct taxa, from 293 fossil occurrences the Paleobiology Database records under this name, spanning 471–450 Mya.
Minnesota, Minnesota, Iowa, Iowa · US
228 taxa · 293 fossils · 471–450 MyaFiled under the Galena Group.
Macrostrat places this rock in the Galena Group, and dates it 457–456 Ma. Macrostrat’s own record
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7 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
- Eurychilina
- Aparchites
- Dicranella
- Saccelatia
- Byrsolopsina
- Carabocrinus
- Euprimitia
- Glyptocrinus
- Hallatia
- Leperditella
- Maratia
- Michelinoceras
- Parabolbina
- Prasopora
- Winchellatia
- Batostoma
- Ceratopsis
- Clathrospira conica
- Cryptophyllus
- Fusispira inflata
- Globonema niota
- Hormotoma gracilis
- Krausella
- Lophospira perangulata
- Opikatia
- Parenthatia
- Pleurocystites squamosus
- Primitiella
- Schmidtella
- Strophomena trilobata
- Tarphophragma
- Tetradella
- Trochonema umbilicata
- Whitfieldoceras
- Aechmina
- Alaskadiscus subacutus
- Ambonychiopsis
- Anazyga recurvirostra
- Archinacella deleta
- Aristerella
The 40 most often recorded, of 228.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.