Environmental Science
8 years ago

Bedrock type determines size of river meanders, impacting landscape diversity.

Earth Surface Processes and Landforms
Lithologic control of bedrock meander dimensions in the Appalachian Valley and Ridge province
Duane D Braun

Paper Summary

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Bedrock meanders in the Appalachian Valley and Ridge province vary in size due to differences in the type of rock they are formed in. Meanders in shaly rocks are larger than those in non-shaly rocks. Other factors don't explain these size differences. Meanders in shaly rocks are about twice as long and have wider valley floors compared to meanders in non-shaly rocks. In plateau regions, meander shapes can change as erosion happens, leading to unusual relationships between meander size and rock type.