English San Rafael Group Cited by user Kent G. Budge on 21 Mar 2022 The San Rafael Group is a geologic group or collection of related rock formations that is spread across the U.S.
English Glen Canyon Group Cited by user Kent G. Budge on 28 Oct 2021 The Glen Canyon Group is a geologic group of formations that is spread across the U.S.
English Carmel Formation Cited by user Kent G. Budge on 25 Oct 2021 The Carmel Formation is a geologic formation in the San Rafael Group that is spread across the U.S.