Point shapefile of quadrangle 6 station locations in Stellwagen Bank National Marine Sanctuary offshore of Boston, Massachusetts where video, photographs and sediment samples were collected by the U.S. Geological Survey from 1993-2004 - includes sediment sample analyses and interpreted geologic sub

The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration's National Marine Sanctuary Program, has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary region since 1993. The area is approximately 3,700 square kilometers (km2) and is subdivided into 18 quadrangles. Seven maps, at a scale of 1:25,000, of quadrangle 6 (211 km2) depict seabed topography, backscatter, ruggedness, geology, substrate mobility, mud content, and areas dominated by fine-grained or coarse-grained sand. Interpretations of bathymetric and seabed backscatter imagery, photographs, video, and grain-size analyses were used to create the geology-based maps. In all, data from 420 stations were analyzed, including sediment samples from 325 locations. The seabed geology map shows the distribution of 10 substrate types ranging from boulder ridges to immobile, muddy sand to mobile, rippled sand. Substrate types are defined on the basis of sediment grain-size composition, surficial morphology, sediment layering, and the mobility or immobility of substrate surfaces. This map series is intended to portray the major geological elements (substrates, features, processes) of environments within quadrangle 6. Additionally, these maps will be the basis for the study of the ecological requirements of invertebrate and vertebrate species that utilize these substrates and guide seabed management in the region.

美国地质调查局（U.S. Geological Survey, USGS）与美国国家海洋和大气管理局国家海洋保护区项目组合作，自1993年起便在斯特尔瓦根班克国家海洋保护区区域开展海底测绘及相关研究。该区域总面积约3700平方千米，被划分为18个四边形测区。针对6号测区（面积211平方千米），科研团队制作了7幅比例尺为1:25000的专题图件，内容涵盖海底地形、海底声呐反向散射数据、地形粗糙度、地质特征、底质活动性、泥质含量，以及以细粒砂或粗粒砂为主的海底区域。
研究人员通过对水深测量影像、海底反向散射影像、照片、视频数据的解译，结合沉积物粒度分析，完成了这套基于地质特征的图件编制。本次研究共分析了420个测站的相关数据，其中包含325个点位的沉积物样品。
海底地质图展示了10种底质类型的空间分布，覆盖从砾石脊、稳定泥质砂到活动波纹砂等多种类型。底质类型的界定依据为沉积物粒度组成、表层形貌、沉积层理结构，以及底质表面的活动性（稳定/不稳定）。
本系列图件旨在呈现6号测区海洋环境内的主要地质要素（包括底质类型、地貌特征与地质过程）。此外，该套图件将作为研究依托此类底质生境的无脊椎动物与脊椎动物物种生态需求的基础数据，同时可为该区域的海底管理提供科学指导。