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Chipped stone crescents are a unique and enigmatic artifact type found throughout the western United States at dozens of sites located in the Great Basin, the Columbia Plateau, and throughout California. Although their distribution covers a large portion of the western United States, crescents are often found in similar contexts in close proximity to water sources including playas, lakes, rivers, and mainland and island coast lines. Crescents are generally thought to be diagnostic to the terminal Pleistocene and Early Holocene (approx. 12,000-8,000 years before present [YBP]) and are representative of assemblages that include fluted and stemmed projectile points.