1. 
   sondage
   In archaeology, a deep test-pit used to investigate a site's stratigraphy (layered arrangement of deposits) before carrying out larger-scale excavation. ...
   Found op http://www.encyclo.co.uk/local/20688
   
   
2. 
   Sondage
   A small archaeological excavation. It usually takes the form of a deep pit dug within a limited area, sometimes within a larger trench.
   Found op http://www.virtualani.org/glossary/index.htm
   
   

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