Lake Floor in the Deep Water Site: The lake bottom in this area has a brush-stroke appearance that might be glacial scrapings and brighter lines that could be drag marks.

Numerous man-made “tracks” found in the northern half of Thunder Bay appear similar to anchor drags, but they are often 17 m (56 ft) wide. Some are raised a few meters above the lake bottom. Image courtesy of Thunder Bay 2010 Expedition, NOAA-OER.

 

Related Links

Thunder Bay 2010: Cutting Edge Technology and the Hunt for Lake Huron’s Lost Ships

Thunder Bay 2010: Mission Summary

NOAA Ocean Explorer Gallery