Decorah Formation
122 distinct taxa, from 159 fossil occurrences the Paleobiology Database records under this name, spanning 457–450 Mya.
Minnesota, Missouri, Iowa, Wisconsin · US
122 taxa · 159 fossils · 457–450 MyaFiled under the Galena Group. Members recorded: Spechts Ferry, Ion, Guttenberg, Rhinidictya bed, Rhinidictya Beds.
Macrostrat places this rock in the Galena Group. Macrostrat’s own record
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11 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
- Carinaropsis cymbula
- Archinacella deleta
- Ctenodonta
- Dinorthis sweeneyi
- Glyptorthis bellarugosa
- Hesperorthis tricenaria
- Phragmolites obliquus
- Sinuites pervoluta
- Anazyga recurvirostra
- Archinacella cingulata
- Cyclonema textilis
- Cyrtolites retrorsus
- Lichenaria typa
- Modiolopsis
- Oepikina inquassa
- Pachydictya
- Paucicrura rogata
- Paupospira oweni
- Primitia
- Punctaparchites rugosus
- Rhynchotrema
- Schmidtella
- Steusloffia
- Streptelasma corniculum
- Strophomena filitexta
- Tetradella
- Amecystis woodi
- Archinacella
- Archinacella patelliformis
- Aristerella nitidula
- Arthroclema
- Bathyurus (Raymondites) spiniger
- Batostoma winchelli
- Bollia
- Bucania halli
- Bumastus trentonensis
- Bythocypris
- Carinaropsis minima
- Cataschisma latiangularis
- Cataschisma typa
The 40 most often recorded, of 122.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.