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One of a group of copper ores and other specimens illustrating the extraction of the metal - a sample of white limestone from Morenci quarry, Lower Carboniferous Age
One of a group of copper ores and other specimens illustrating the extraction of the metal - a sample of grey limestone from Morenci quarry, Lower Carboniferous Age
One of a group of copper ores and other specimens illustrating the extraction of the metal - a sample of limestone from Longfellow formation, Ordovician Age