[2] It named for Roche à Perdrix in Jasper National Park, Alberta, by P.E.

[3] The Perdrix Formation was deposited in a marine basin and consists primarily of black, bituminous shales.

The upper portion includes nodules and thin nodular beds of argillaceous limestone that increase in frequency upwards and laterally toward the reefs of the Cairn Formation.

[3] The Perdrix Formation is present as outcrops in the front and main ranges of the Canadian Rockies from the Kakwa Lakes area in northeastern British Columbia to the Ram River area of Alberta.

[3] Tentaculids are common throughout the Perdrix Formation, and brachiopods and pelecypods are present in the more limestone-rich portions.