n.砂巖漂礫

Bringing a sarsen stone to Stonehenge requires years of planning. 把巖石帶到巨石陣是需要常年的計(jì)劃的.

The closest source of the large sarsen stones is here at the Marlborough Downs, to the north of Stonehenge. 最近的石頭資源是在萬寶路低谷這兒，面對巨石陣北面的地方.

and the outer ring of huge sarsen stones was completed 500 years later. 而外環(huán)的砂巖石又在此后500年才完工。

sarsen stone 殘留巖體