What does the word shale mean?

Usage examples for shale

  1. At the summit she waited for the horse to clamber up the shale after her. – Brand Blotters by William MacLeod Raine
  2. One generation after another of tall trees grew with their roots in mud, and their leaves and prostrate trunks formed layers of vegetable matter, which was afterwards covered with mud since turned to shale. – The Student's Elements of Geology by Sir Charles Lyell
  3. " Down at Little Shale, you mean. – The Obstacle Race by Ethel M. Dell
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