Sediment-Texture Units of the Sea Floor for Vineyard and western Nantucket Sounds, Massachusetts (polygon shapefile, Geographic, WGS84)

Geologic, sediment texture, and physiographic zone maps characterize the sea floor of Vineyard and western Nantucket Sounds, Massachusetts. These maps were derived from interpretations of seismic-reflection profiles, high-resolution bathymetry, acoustic-backscatter intensity, bottom photographs, and surficial sediment samples. The interpretation of the seismic stratigraphy and mapping of glacial and Holocene marine units provided a foundation on which the surficial maps were created. This mapping is a result of a collaborative effort between the U.S. Geological Survey and the Massachusetts Office of Coastal Zone Management to characterize the surface and subsurface geologic framework offshore of Massachusetts.

美国马萨诸塞州葡萄园湾（Vineyard Sound）与南塔基特湾（Nantucket Sound）西部海域的海底特征，可通过地质、沉积物纹理及地貌分区三类地图进行表征。上述地图的编制基于对地震反射剖面、高分辨率水深数据、声学背散射强度、海底照片以及表层沉积物样品的解译工作。地震地层解译以及冰期与全新世海相地层单元的填图，为表层地图的编制奠定了基础。本项填图工作是美国地质调查局（U.S. Geological Survey）与马萨诸塞州海岸带管理办公室（Massachusetts Office of Coastal Zone Management）的合作成果，旨在表征马萨诸塞州近海的表层与地下地质格架。