The comparative form of 'cherty'; more resembling or containing more chert than something else.
From 'cherty' (adjective form of chert) plus the comparative suffix '-er'. The base word 'chert' plus '-y' creates the adjective, then '-er' creates the comparative degree.
Geological descriptions like 'chertier' showcase how scientists create comparative language for rock properties—a sample might be 'chertier' than another if it has higher percentages of silica mineral composition.
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