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Iron ores --- Copper ores. --- Gold ores --- Fer --- Cuivres --- Or --- Geology. --- Gisements --- Géologie. --- Minerais. --- Minerais --- Crinoidea, Fossil --- Paleontology --- Fossilogy --- Fossilology --- Palaeontology --- Paleontology, Zoological --- Paleozoology --- Silurian Period --- Ordovician Period --- Historical geology --- Zoology --- Fossils --- Prehistoric animals in motion pictures --- Pelmatozoa, Fossil