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Republican River, Southwest Nebraska, USA
Reference
Daniels, J.M. and Knox, J.C.  2005.  Alluvial stratigraphic evidence for channel incision during the Mediaeval Warm Period on the central Great plains, USA.  The Holocene 15: 736-747.

Description
Alluvial stratigraphic data from the upper Republican River, southwest Nebraska, USA, provided evidence for major channel incision between c. 1100 and 800 14C yr BP that correlates with a multicentennial episode of common, widespread drought, which the authors state is associated with the Medieval Warm Period, which occurred between AD 900 and 1200.