on Oct 26, 2015
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Known Information
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| Height | 5 ½" | | Diameter | 5 1/2" | | Length | 7” | | Diameter | 1 ½” | | Weight | 13.6 oz | | MORTAR & PESTLE | SHELL MOUND REGION, East Bay, San Francisco, California, 19th Century Find | | Weight | 3 lbs 8.8 oz | The mound reportedly was over 60 feet high and some 350 feet in diameter
The size of this mortar suggests it was used for moderate, circular grinding/pulverizing of plant/food-stuffs
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