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| A large and well made Glacial Kame type slate birdstone, collected in Sangamon County, Illinois. ; image credit on full record. |
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| An opposite side view of this Glacial Kame type slate birdstone; image credit on full record. |
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| A "head" end view of this slate birdstone; image credit on full record. |
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| An underside view of this Illinois birdstone with multiple collector's annotations; image credit on full record. |
