This item is a set of 3 Pre-Columbian Neolithic stone tools found on the shore of a large island in Gatun Lake near the south end of the Gatun Locks. The Zonians called this island Navy Island, but the official name is Guarapo Island. Before the Panama Canal was constructed, this island was a tall hill on the edge of the Chagres River. All of these artifacts are surface finds. As a teen living in the town of Gatun, I visited Navy Island often to fish and camp. The wave action from the ships leaving Gatun Locks would wash against the steep hillside and erode the red clay soil to expose lithic artifacts. I collected these between 1966 and 1968. All of the artifacts were collected in the American Canal Zone prior to when the territory was ceded back to Panama in 1999.

All three artifacts were made out of a dense coarse stone. I think that all 3 are pestles for grinding foods. The largest artifact is polished from use on the heavy end.. The approximate dimensions are as follows