The spectacular science of the Great Lakes' glowing rocks
from Atlas Obscura
Look at Erik Rintamaki's rock collection under the white light of a 60-watt bulb or with sunlight streaming in the window, and you might nod politely. A lifelong rock picker, the Michigander has gathered a smattering of shapes, sizes, and colors. The rocks with rounded edges — many of them small enough to fit in your palm — tell long stories of ancient, grinding ice, and the relentless movement of waves and sand.
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