A conspicuous submarine escarpment is revealed on the topographic map of the Great Wass Island quadrangle published by the United States Geological Survey (figure 1). This map shows some of the islands off the coast of Maine and the contour of the sea floor. Dr. Laurence La-Forge2 suggested that this escarpment may be a wave-cut cliff, and he considered also the alternative conception that it is a fault scarp, but in view of the existence of neighboring scarps having different trends and of platforms at several depths he decided that it was probably caused by marine erosion.
D. W. Johnson has given us the most complete consideration of this escarpment in his masterly treatise entitled “New England-Acadian shore lines.”3 This book not only presents an excellent analysis of coastal forms and processes but has been a pioneer in the consideration of the origin of certain types of submarine . . .