These large triangular projectile points from Site 22-31 were made around 800 years ago during the Late Woodland period. Although most of the Late Woodland tools found at the District's sites were made from local stones like quartz and quartzite, some like the one shown in the upper left of this picture were made from stone carried several hundred miles from its source. Information about where stone comes from is important for archaeologists, not just because it tells us how people were getting the materials they used in everyday life,but also about how local groups were linked to other people in the broader region.