Figure 6. Bedrock map of the Boothbay Harbor area, with the Lincoln Sill highlighted in red (from Hussey and Pankiwskyj, 1975). Notice that the sill is part of the bedrock around Burnt Island to the west, east, and south (on Squirrel Island). Any of these places could have been the source of the Burnt Island boulders.
Last updated on October 6, 2005