Shell Currency Was Part Of An Ancient Economy In The Channel Islands - Natural Reserve System
Based on Channel Islands artifacts, archaeologist Lynn Gamble argues the Chumash people were using a shell currency 2,000 years ago.
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10000 years of economy - Cowry shells, a form of currency
Cahokia's shell bead crafters and maize producers: A re-examination of the data - ScienceDirect
Chumash Cash: The Saucers That Formed America's First Economy
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Chumash Indians Were Using Shell Bead Money 2,000 Years Ago
On This Day in History: The Chumash Revolt of 1824
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