Grand Meadow Quarry Archeological District - Credit: Wikimedia Commons
The Grand Meadow Quarry Archeological District (21MW8) in Mower County, Minnesota, United States, is an Indigenous historic district that was added to the National Register of Historic Places in 1994. The principal site within the District is the Grand Meadow Chert Quarry (GMCQ), originally a sprawling landscape of an estimated 2,000 pits dug over many centuries using handheld tools to reach a layer of high-quality gray chert (or "flint"). Even though the District is now predominantly obscured by plowed farmland and roadways, a pristine 8-acre remnant of the original 170-acre chert quarry still exists in a small woods, alongside 7 acres of restored prairie and grassland. That 15-acre portion of the quarry site, purchased by The Archaeological Conservancy (TAC) in 1994, is separately known as "The Grand Meadow Chert Quarry Archaeological and Cultural Preserve." Read more on Wikipedia
Source: en.wikipedia.org