GLGY 308 Lecture Notes - Lecture 6: Wild Rice, Lake Superior, Arsenical Bronze
28 Dec 2019
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Document Summary
Indigenous people arrived in this area about 10 000 years ago. They dug thousands of copper quarry pits. Copper tools from lake superior have been identified as faraway as florida and even into. Copper was malleable so it could be used in a variety of ways. Native americans have been working with copper for nearly 10 000 years. Used repeated steps of pounding, heating and crafting to create jewelry, tools and weapons. There are mining sites that are as old as 10 000 years old in the great lakes area and. Ancient copper work shop at cahokia was used between 800 ad to 1400 ad. Artifacts of silver, gold, alloys and arsenic bronze have been found in or near the ancient mounds of the eastern united states, the former home of the mississippian culture. When cu-bearing rocks are exposed at the surface, conifer trees can concentrate cu in their tissues (up to 700 ppm) above background soil (70 ppm)
