argillite

argillite Definition

ar·gil·lite (är′jə līt′)

noun

a hardened mudstone showing no slatelike cleavage

Etymology: L argilla (see argillaceous) + -ite

argillite Usage Examples

Adjective modifier

weathered: The basement rocks, which tested oil, consist of fractured metaquartzites, weathered argillites and weathered granite.

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