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boulder clay
noun
- a glacial deposit consisting chiefly of unstratified clay with embedded boulders.
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Word History and Origins
Origin of boulder clay1
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Example Sentences
The U-shaped character of the valleys was very pronounced, while boulder-clay obtruded itself everywhere on our notice.
That there might be several deposits of the boulder-clay with intervening strata, does not appear to have been suggested.
(B) The ‘sub-boulder-clay’ skeleton, discovered near Ipswich in 1911, was in an extraordinarily contracted attitude.
The boulder clay of Germany is supposed to have accumulated underneath this vast "mer de glace," as he calls it.
The deposits immediately preceding the Forest-Bed would also be contemporaneous with the lower continental boulder clay.
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