Sediments off Cape Ann to Cape Cod, MA acquired in 1973 (SCHLEE73 shapefile)

The reconnaissance maps upon which this data set is based show the areal distribution of the major bottom sediment types covering the sea floor off Massachusetts between Cape Ann and Cape Cod. The maps were intended as a guide to the future mapping of gravel, sand, silt, and clay, and, because these sediments reflect the hydraulic conditions, they are also helpful for deducing the important sediment transport mechanisms.本数据集所依托的踏勘地图，展示了马萨诸塞州安角（Cape Ann）至科德角（Cape Cod）外海域海底的主要海底沉积物类型的空间分布。该类地图旨在为砾石、砂、粉砂与黏土的后续测绘工作提供参考依据；由于这些沉积物能够反映区域水动力条件，因此也可用于推演关键的沉积物输运机制。