Map of "Geology of the Sea Bottom in the Approaches to New York Bay." This map depicts the upper reaches of Hudson Canyon and the remnants of a valley

Map of “Geology of the Sea Bottom in the Approaches to New York Bay.” This map depicts the upper reaches of Hudson Canyon and the remnants of a valley in continental shelf. This early physiographic map was published in the Coast and Geodetic Survey Annual Report for 1884, Appendix 13, p. 438. It was drawn by Adolph Lindenkohl and is the earliest published map of a submarine canyon.