Barnhardt, W.A., Kelley, J.T., Belknap, D.F., Dickson, S.M., and Kelley, A.R., 1996, Surficial geology of the inner continental shelf of the northwestern Gulf of Maine: Petit Manan Point to West Quoddy Head. Maine Geological Survey Geologic Map 96-6 to 96-12, 1:100,000. (an atlas of 7 1: 250,000 maps of the Maine inner shelf)