boulder clay

/ˌboʊldər ˈkleɪ/
IPA guide

Other forms: boulder clays

Definitions of boulder clay
  1. noun
    unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together
    synonyms: till
    see moresee less
    type of:
    dirt, soil
    the part of the earth's surface consisting of humus and disintegrated rock
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