Erratic

Alternative definitions (3), class: vernacular (0)
Term: Erratic
Definition: A rock of unspecified shape and size, transported a significant distance from its origin by a glacier or iceberg and deposited by melting of the ice. Erratics range from pebble-size to larger than a house and usually are of a different composition that the bedrock or sediment on which they are deposited.

A boulder or large block of bedrock that is being, or has been, transported away from its source by a glacier.  Swisseduc 

A large rock boulder that has been transported by glaciers away from its origin and deposited in a region of dissimilar rock.  PhysicalGeography 

 GCW 
Created 2017.06.06
Last Modified 2022.04.08
Contributed by GCW Glossary
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