1. Bedrock topography of western Cape Cod, Massachusetts, based on bedrock altitudes from geological borings and analysis of ambient seismic noise by the horizontal-to-vertical spectral-ratio method Yale Public content 2013. 2013-06-11T18:00:07Z. 2013-07-29T14:36:17Z. Fairchild, Gillian M., cartographer. U.S. Department of the Interior, U.S. Geological Survey. English. cartographic image. Public. Massachusetts, Cape Cod, and Cape Cod.