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Michigans Most Ancient Industry is Americas
Excavation in an Ancient Pit Showing Numerous Stone Sledges
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aboriginal Allouez American ancient copper ancient miners ancient pits appear axes Aztecs bones boulders canoe Catlinite chisels clay Copper Country Copper Harbor copper implements copper mines debris deposits depth Detroit diameter discovered discovery district earth evidence excavations exploration extended fact feet fire forest French grooved Harbor Houghton hundred inches Indians indicate island Isle Royale Jesuit Keweenaw Peninsula Keweenaw Point known labor Lake Superior Lake Superior region land mass of copper mastodon mauls McCargoe Cove metal Mexico Michigan miles Minnesota Minong mound builders mound-builders native copper nearly northern Ohio Ontonagon County Ontonagon River pieces of copper Portage Lake possession pounds prehistoric present probably race relics rock rude savages says seen shore of Lake side silver Siskiwit Bay Smithsonian spear specimens stone hammers surface timber tons trees tribes tumuli Tuteloes valley veins visited weighing Wisconsin wrought