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The three-age system in archaeology and physical anthropology is the periodization of human prehistory and history into three consecutive time periods, named for their respective tool-making technologies: * The Stone Age * The Bronze Age * The Iron Age ==Origin== The concept of dividing pre-historical ages into systems based on metals extends far back in European history, but the present archaeological system of the three main ages—stone, bronze and iron—originates with the Danish archaeologist Christian Jürgensen Thomsen (1788–1865), who placed the system on a more scientific basis by typological and chronological studies, at first, of tools and other artifacts present in the Museum of Northern Antiquities in Copenhagen (later the National Museum of Denmark). He later used artifacts and the excavation reports published or sent to him by Danish archaeologists who were doing controlled excavations. His position as curator of the museum gave him enough visibility to become highly influential on Danish archaeology. A well-known and well-liked figure, he explained his system in person to visitors at the museum, many of them professional archaeologists. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Three-age system」の詳細全文を読む スポンサード リンク
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