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Use "unweathered" in a sentence
"The fossil bone was almost the same color as the stone, though I recall the unweathered parts being purplish and the more weathered surfaces being almost white."
"But the area where they were found does not feature on an army map of designated training areas and the canisters appeared new and unweathered."
"And shattering the rocks exposes "fresh, unweathered surfaces, thus releasing mineral nutrients held within the rock.""