argillites
/ˈɑːdʒɪlʌɪt/
noun
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.
noun
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.
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