Four Corners Rock Units

Groups:

• San Rafael Group
• Glen Canyon Group

Formations

• Mancos Shale
• Dakota Sandstone
• Morrison Formation
• Bluff Sandstone
• Summerville Formation
• Wanakah Formation
• Todilto Formation
• Entrada Sandstone
• Carmel Formation
• Page Sandstone
• Navajo Sandstone
• Kayenta Formation
• Wingate Sandstone
• Moenave Formation
• Zuni Sandstone
• Cow Springs Sandstone
• Chinle Formation
• Moenkopi Formation
• Kaibab Limestone
• Cutler Formation
• White Rim Sandstone
• DeChelly Sandstone
• Organ Rock Shale
• Cedar Mesa Sandstone
• Hagaito Shale
• Elephant Canyon Formation
• Rico Formation
• Hermosa Formation