6-m resolution gray-scale image of multibeam backscatter intensity in western Massachusetts Bay map Quadrangle 2 (Q2_BACKGS.TIF)

The U.S. Geological Survey has conducted geologic mapping to characterize the sea floor offshore of Massachusetts. The mapping was carried out using a Simrad Subsea...美国地质调查局（U.S. Geological Survey）已开展地质测绘工作，以表征马萨诸塞州近海海底的地质特征。本次测绘采用Simrad Subsea……