Portuguese Formação Kirtland Cited by user DarkWerewolf on 18 Dec 2022 A Formação Kirtland (originalmente Kirtland Shale) é uma formação geológica sedimentar.
English Kirtland Formation Cited by user Kent G. Budge on 14 Sep 2021 The base of the Kirtland Formation and its lowest sub-unit, the Hunter Wash member, has been dated to 75.02 ± 0.13 Ma.