[2] The Doig Formation is composed of fine grained, grey argillaceous siltstone and dark calcareous shale.

[3] The formation has provided fossils of various species of conodonts; Magnigondolella alexanderi, M. cyri, M. julii, M. nebuchadnezzari, M. salomae, Neogondolella curva, N. hastata, N. panlaurentia and N. ex gr.

[4] The Doig Formation reaches a maximum thickness of 190 metres (620 ft) in the Canadian Rockies foothills it thins towards the north and east.

[6] Total organic carbon values in the "phosphate zone" at the base of the Doig are commonly greater than 4% by weight and can reach up to 11%.

[7] Oil and gas is also extracted from the Doig Formation in conventional reservoirs along the western Montney trend and in the Peace River Arch.