On the western slopes of the Rocky Mountains and situated within Yoho National Park, this site contains exposures of fossiliferous rocks dating from the earliest years of the Cambrian period (530 million years ago). Fossils found here include the impressions of many soft-bodied animals such as Burgessochaeta and the bizarrely named Hallucinogenia, the arthropods Aysheaia, Marrella, Sidneya and Burgessia and the trilobite Ogygopsis.
With no hard (calcareous) body parts it is extremely rare for soft-bodied animals to be preserved as fossils. Fossils found here show a bewildering variety of animals, often bizarrely shaped by conventional standards.