This object appears to be a preform bannerstone or atlatl weight, a prehistoric Native American stone artifact. [1, 2]Typical Purpose and FeaturesFunction: These artifacts were typically used during the Archaic period (approx. 8,000 to 1,000 B.C.) as counterweights on an atlatl (spear thrower). They improved the balance, velocity, and distance of a thrown spear.Preform State: The term "preform" implies the object was pecked and ground into its distinct shape but left incomplete. [1]The Raised Ridges: The central horizontal ridge or raised nodules visible across the middle mark the location where the maker intended to drill a hollow canal through the core. Once drilled, the bannerstone would slide directly onto the wooden shaft of the atlatl. [1, 2]Material: They were commonly carved out of local dense rocks like granite, slate, quartzite, or other igneous materials in x 2.5 in x 1.5 in

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