Modoc Rock Shelter, Archaeological site near Prairie du Rocher, Illinois, US.
The rock shelter sits beneath sandstone bluffs along the Mississippi River floodplain, containing 28 feet of sediment with prehistoric artifacts.
Discovered in 1951 by archaeologist Irvin Peithmann, the site revealed evidence of human habitation dating back to 9,000 years ago.
The shelter contains multiple layers of artifacts including projectile points, scrapers, hammer stones, and bone tools from different Native American periods.
Located southeast of Prairie du Rocher in Randolph County, the fenced archaeological site remains accessible to visitors without admission fees.
The excavations uncovered four separate periods of Archaic occupation, revealing changes in hunting practices and settlement patterns over millennia.
GPS coordinates: 38.06283,-90.06400
Latest update: March 8, 2025 13:29
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