Glenwood Formation
81 distinct taxa, from 127 fossil occurrences the Paleobiology Database records under this name, spanning 457–450 Mya.
Minnesota, Illinois, Iowa, Illinois, Iowa, Wisconsin · US
81 taxa · 127 fossils · 457–450 MyaMacrostrat places this rock in the Ancell Group. Macrostrat’s own record
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6 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
- Ectomaria prisca
- Actinoceras
- Zittelloceras
- Ambonychiopsis
- Cameroceras
- Campylorthis deflecta
- Cataschisma convexum
- Centrocyrtoceras
- Clathrospira subconica
- Cyclonema percarinata
- Cyrtodonta
- Doleroides
- Endoceras proteiforme
- Eotomaria dryope
- Eotomaria vicina
- Fusispira spicula
- Gyronema pulchellum
- Gyronema semicarinatum
- Helcionopsis wisconsinensis
- Hormotoma gracilis
- Hormotoma gracilis angustatus
- Liospira angustata
- Liospira obtusa
- Manespira nicolleti
- Metaspyroceras
- Paraliospira abrupta
- Paraliospira supracingulata
- Plectoceras
- Reedsoceras
- Rostricellula minnesotensis
- Subulites conradi
- Subulites dixonenesis
- Subulites regularis
- Tripteroceras
- Trochonema beachi
- Trochonema beloitense
- Trochonema rugosa
- Trochonema umbilicata
- Trochonema vagrans
- Whitfieldoceras
The 40 most often recorded, of 81.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.