Brainard Shale Formation
31 distinct taxa, from 43 fossil occurrences the Paleobiology Database records under this name, spanning 450–446 Mya.
Illinois, Iowa, Iowa, Illinois, Iowa, Wisconsin · US
31 taxa · 43 fossils · 450–446 MyaFiled under the Maquoketa Group.
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3 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
- Aechmina
- Dendrocrinus
- Cupulocrinus angustatus
- Eridoconcha
- Euprimitia
- Kiesowia
- Leperditella
- Tetradella
- Americoncha
- Anartiocystis
- Astrocystites
- Beloitoceras
- Bollia
- Bothriocidaris
- Carabocrinus
- Ceratopsis
- Cupulocrinus
- Cyclocystoides
- Deiroceras
- Diamphidiocystis
- Iowacystis sagittaria
- Laccoprimitia
- Plicodendrocrinus casei
- Porocrinus
- Quasibollia ridicula
- Rhenopyrgus
- Schmidtella
- Sygcaulocrinus typus
- Trichinocrinus
- Xenocrinus
- Zygobolboides
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.