Franconia Formation
69 distinct taxa, from 193 fossil occurrences the Paleobiology Database records under this name, spanning 497–487 Mya.
Minnesota, Wisconsin · US
69 taxa · 193 fossils · 497–487 MyaMembers recorded: Reno, Tomah, Mill Street Conglomerate, Goodenough, Ironton, Hudson.
Macrostrat places this rock in the Elvins Group. Macrostrat’s own record
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8 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
- Idahoia serapio
- Ptychaspis granulosa
- Ptychaspis miniscaensis
- Monocheilus anatinum
- Pseudagnostus josephus
- Prosaukia misa
- Ptychaspis
- Chariocephalus whitfieldi
- Ellipsocephaloides curtus
- Idahoia wisconsensis
- Wilbernia pero
- Saratogia hamula
- Ellipsocephaloides
- Monocheilus micros
- Prosaukia ambigua
- Pseudagnostus
- Ptychaspis tuberosa
- Dikelocephalus freeburgensis
- Drumaspis texana
- Obolus
- Pelagiella
- Proplina extensum
- Saratogia
- Stigmacephalus flexifrons
- Trilobita
- Wilbernia
- Acrotreta
- Agnostida
- Berkeia typica
- Billingsella
- Brachiopoda
- Briscoia pertransversa
- Burnetiella
- Camaraspis
- Camaraspis berkeyi
- Camaraspis convexus
- Cheilocephalus
- Conaspis
- Dicellomus
- Dicellomus politus
The 40 most often recorded, of 69.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.