One of the mysteries of the English language finally explained.
A sedimentary rock that does not split easily, formed from consolidated clay.
- ‘The Nelson mineral belt was rich in argillite, a dark stone which made fine tools.’
- ‘Low water levels reveal carved layers of green and red argillite.’
- ‘Bear images were carved into blocks of argillite, claystone, and wood or sculpted from clay, with the creative three-dimensional transformations displaying a remarkably naturalistic style.’
Late 18th century: from Latin argilla ‘clay’ + -ite.
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