Linked from
The 26 pages that link to Cambrian, each with the reason it gives.
Burgess ShaleNarrower topic: The deposit records marine ecosystems from the middle Cambrian.
Chengjiang biotaNarrower topic: Chengjiang fossils date to the early part of this geological period.
OpabiniaNarrower topic: Opabinia lived during this period, when animal diversity expanded rapidly.
RadiodontaNarrower topic: Most known radiodont fossils come from Cambrian rocks.
WiwaxiaNarrower topic: Wiwaxia fossils occur in deposits from this interval.
CanadaspisNarrower topic: Canadaspis lived during this period's early diversification of arthropods.
OttoiaNarrower topic: Ottoia lived during this period, when its fossils entered the Burgess Shale.