"Are the spear points Indian?" Probably not. There weren't any Indians here that long ago, they got here only 6,000 years ago. Must be Kennewick Man's people. (..and probably pre-Clovis like Cactus Hill and the Topper sites)
Have the copper mining sites on U.P. Michgan ever been dated ? Just wondering whether any of the people who settle this site might have had a relationship to that mystery.