U.S. Geological Survey Open-File Report 2010-1035
Geophysical Data Collected from the St. Clair River between Michigan and Ontario, Canada (2008-016-FA)
Figure 2. Illustration of the geophysical systems used to define the geologic framework. Sidescan-sonar, swath-bathymetric and seismic-reflection systems were used to define the surficial sediment distribution, depth, and underlying geology. Sampling systems were used to collect direct samples of the river-bed sediment. Differential Global Positioning System (DGPS) was used to navigate the instrumentation.