A LITHIC CAST of a stone tool from the site of Rimrock Draw Rockshelter (35HA3855) in Harney County, Eastern Oregon. This site is one of the most important in the Americas, with some of the oldest possible dates for human occupation going back as far as 18,300 years ago. It has been under excavation and study by Patrick O'Grady, and the Bureau of Land Management since 2011,  and has become one of the most scientifically important in North America, due to some of the oldest dates for human occupation in the continent. In 2012 the archaeological field team discovered flake tools under a layer of volcanic ash from Mount St. Helens, dating to 15,300 to 15,600 years ago. Further excavations found Camelops tooth enamel dating to over 18,300 years ago, and this tool was found 10cm beneath that find in situ. This is leading scientists to the conclusion that this could be one of the oldest known stone tools in North America, as found in layers dating over 18,000 years ago.  This tool still had bison residue adhered to it, and is a multi-tool with several unique functions.  It has two different unifacial scraper edges, one straight and one slightly convex.  Another edge is bifacial and polished, while yet another edge terminates in an unworked flake edge which is still very sharp.  It was made in an orange Chalcedony, and measures 70mm across each longest measurement, and max width of 9mm.This amazing archaeological example was sent to Occpaleo for molding and casting in 2025 by the Burns, Bureau of Land Management/Rimrock Draw Fieldschool/Patrick O'Grady. (Copyright Occpaleo 2025)