INFORMATION ABOUT:

• Maine Geological Survey
• Explore!
• Using geologic maps
• Maps, publications, data
  • Online Maps
    • Beach and dune geology
    • Bedrock geology
    • Bedrock ground water
    • Coastal bluffs
    • Coastal landslides
    • Earthquakes
    • Inner continental shelf
    • Lakes
    • Sand and gravel aquifers
    • Surficial geology
    • Surficial materials
• Educational materials
• Related links

Online Bedrock Geology Maps

You will need the free Adobe Reader to view these maps. If you need assistance, view our PDF Help page or contact us at mgs@maine.gov.

Regional Maps

• Simplified Bedrock Geologic Map of Maine (1.0 Mb PDF file) An 11" x 17" color map showing the simplified bedrock geology of Maine. Inset maps show regional metamorphic zones and generalized Northern Appalachian geology. The map also includes a generalized geologic cross section. A table and text on the reverse describe the geologic history of Maine and how it relates to plate tectonics.
  
  
• Bedrock Geology of Mount Desert Island (2.4 Mb PDF file) 1988, 23" x 29" color map. Includes locations of sites of geologic interest.
  • The Geology of Mount Desert Island - A Visitor's Guide to the Geology of Acadia National Park, Bulletin 38. Popular guide to park geology.
  
  
• Bedrock Geology of North Haven and Vinalhaven Islands (14.5 Mb PDF file) 2001, 36" x 48" color map. Map discusses geologic history and structural geology of the region. Includes photos and cross sections.
  
  
• Bedrock Geology of the Bath 1:100,000 Quadrangle (4.9 Mb PDF file) 2002, 36" x 44" color map. Includes radiometric age dates and photos describing rock types.
  • Bedrock geology of the Bath 1:100,000 map sheet, coastal Maine, Bulletin 42. Describes stratified rock sequences, intrusive rocks, structural geology, and metamorphism of the Bath 1:100,000 map sheet.
  
  
• Bedrock Geology of the Portland 1:100,000 Quadrangle (4.3 Mb PDF file) 1998, 36" x 36" color map.
  
  
• Bedrock Geology of the Calais 1:100,000 Quadrangle (13.2 Mb PDF file) 2003, 36" x 44" color map. Includes photos of rock types and regional correlation chart.
  
  

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Quadrangle Maps

• Related links:
  • Description of bedrock geology map series
  • Tips for reading bedrock geology maps

The quadrangle names in the following list link to PDF files of Bedrock Geology maps. Each PDF file is approximately 2 MB in size. PDF files of sidebars specific to individual maps are listed below the respective quadrangle names.

Bar Mills Bowdoinham sidebar Dill Hill Fletcher Peak Gray Limington sidebar Milton Naples Newbury Neck sidebar North Windham sidebar North Whitefield Old Orchard Beach sidebar Portland East sidebar Portland West sidebar Prouts Neck sidebar Purgatory sidebar Raymond Razorville Salsbury Cove sidebar Standish Washington Waterboro Weeks Mills sidebar

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Last updated on October 31, 2007

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