Maine Geological Survey: Bedrock Geologic Map of Maine Bedrock geologic map of Maine” by Philip H. Osberg, Arthur M Maine Geological Survey: Surficial Geologic Map of Maine Simplified bedrock geologic map of Maine” by Marc Loiselle Maine geologic map data Simplified surficial geologic map of Maine” by Marc Loiselle Maine Geological Survey: Metallic Mineral Deposits Geologic Maps of the 50 United States | Map, Map art, Geology Maine Geological Survey: Bedrock Geologic History of Maine Figure 1
