Mabee, S. B. Brittle Structure Database of the Gloucester and Rockport quadrangles, Massachusetts. Open-File Report (2007).

W., D. & M., F. [Digital Conversion] Bedrock geologic map of the Gloucester and Rockport quadrangles, Massachusetts. Digital Conversion (2007).

Hein, C. J., Fitzgerald, D.M,, Barnhardt, W. A. & Stone, B. D. Onshore-Offshore Surficial Geologic Map of the Newburyport East and Northern Half of the Ipswich Quadrangles, Massachusetts. Geologic Map (2010).