The Bastion Formation is a geologic formation in Greenland. It preserves fossils dating back to the Cambrian period.

• List of fossiliferous stratigraphic units in Greenland

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.

• Mollusc fauna of the Early Cambrian Bastion Formation