Glacial River Warren, also known as River Warren, was a prehistoric river that drained Lake Agassiz in central North America between about 13,500 and 10,650 BP calibrated (11,700 and 9,400 14C uncalibrated) years ago.[1] A part of the uppermost portion of the former river channel was designated a National Natural Landmark in 1966.[2]
- ^ Fisher, River Warren Boulders, pp. 348, 350.
- ^ "National Natural Landmarks – National Natural Landmarks (U.S. National Park Service)". www.nps.gov. Retrieved 2019-03-27.
Year designated: 1966
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