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Flag Fen, east of Peterborough,〔Pryor 2005. p. 9.〕 England, is a Bronze Age site developed about 3500 years ago, comprising over 60,000 timbers, arranged in five very long rows, creating a wooden causeway (around 1 km long) across the wet fenland. Part way across the structure, a small island was formed. Items associated with it have led scholars to conclude the island was a site of religious ceremonies and significance. Archaeological work began at the site, which is located 800 m (0.5 miles) east of Fengate,〔Pryor 2005. p. 13.〕 in 1982. Some areas have been reconstructed, including a typical Iron Age roundhouse dwelling. Flag Fen is part of the Greater Fens Museum Partnership. A visitors' centre has been constructed on site. ==Construction== A Neolithic trackway once ran across what archaeologists have termed as the "Flag Fen Basin", from a dryland area known as Fengate,〔 to a natural clay island called Northey〔 (now the site of Whittlesey). The basin is an embayment of low-lying land on the western margins of the Fens.〔 The level of inundation by 1300 BC led to the occupants' constructing a timber causeway along the trackway route.〔 The causeway, and center platform, were formed by driving 'thousands of posts with long pencil-like tips' through the 'accumulating peaty muds' and into the firmer ground below.〔 The resulting structure covered three and a half acres. Dendrochronological analysis, or dating of the posts by studying tree rings, led to an estimated date for the various stages of construction as between 1365–967 BC.〔 Some of the timbers, such as oak, were not natural to the local environment.〔 This means that the people who constructed this timber causeway wanted to use materials that perhaps had religious significance to their lives. They made a significant effort to transport the timbers to the site from distant sources.〔 Similarly, scholars have traced the bluestones at Stonehenge, Salisbury, as originating in the Preseli Mountains in Wales. 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「Flag Fen」の詳細全文を読む スポンサード リンク
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