Bond Formation
44 distinct taxa, from 51 fossil occurrences the Paleobiology Database records under this name, spanning 306–304 Mya.
Illinois · US
44 taxa · 51 fossils · 306–304 MyaFiled under the McLeansboro Group. Members recorded: LaSalle Limestone.
Macrostrat places this rock in the McLeansboro Group, and dates it 305–304 Ma. Macrostrat’s own record
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2 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
- Clepsydrops collettii
- Cricotus heteroclitus
- Clepsydrops vinslovii
- Stenopecrinus
- Ulocrinus
- Allosocrinus bronaughi
- Anobasicrinus brevis
- Apographiocrinus typicalis
- Belemnospongia parmula
- Brabeocrinus christinae
- Brachydectes newberryi
- Calliasterella americana
- Chlidonocrinus
- Clathrocrinus clathratus
- Clathrocrinus clinatus
- Clepsydrops
- Contocrinus coupi
- Dichocrinus nola
- Diplocaulus salamandroides
- Elibatocrinus elegans
- Endelocrinus
- Erisocrinus typus
- Euonychocrinus simplex
- Exocrinus
- Exoriocrinus lasallensis
- Galateacrinus coacervatus
- Haeretocrinus
- Haeretocrinus wagneri
- Halogetocrinus paucus
- Isoallagecrinus lasallensis
- Laudonocrinus
- Microcaracrinus conjugulus
- Moundocrinus
- Paramphicrinus oklahomaensis
- Parulocrinus pontiacensis
- Plummericrinus
- Polusocrinus
- Polygonocrinus spiniferus
- Probletocrinus curtus
- Reptilia
The 40 most often recorded, of 44.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.