Definition of boulder clay in English:

boulder clay

Line breaks: boul|der clay

noun

[mass noun]
  • Clay containing many large stones and boulders, formed by deposition from melting glaciers and ice sheets.
    More example sentences
    • It's a deep, steep-sided ravine formed in Magnesian Limestone and boulder clay.
    • Erosion at Filey Bay is due to the sea and the rain attacking the cliffs, which are made of boulder clay - a mixture of sand, stones, and soil - which becomes soft when wet.
    • A rough stone capping has already been laid on the underlying boulder clay on a 1.5 kilometre section.

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