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shale

/ʃeɪl/
/ʃeɪl/
IPA guide

Other forms: shales

Definitions of shale
  1. noun
    a sedimentary rock formed by the deposition of successive layers of clay
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    types:
    humic shale
    shale that is rich in humic acids
    oil shale
    shale from which oil can be obtained by heating
    type of:
    sedimentary rock
    rock formed from consolidated clay sediments
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