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針山(英文:Needle Hill),又叫尖山,係香港中部一山,響新界南部。佢山頂睇嚟幾尖,海拔532米高。佢北面有草山,南面係下城門水塘,西面係城門水塘。城門隧道響佢南邊穿過。「針草帽」係麥理浩徑第7段,三條大斜路,往往決定毅行者行唔行得成。
針山山體由花崗岩構成。酸性岩漿喺白堊紀形時入侵地殼,喺城門河谷嘅西北面形成咗一個東北-西南走向嘅侵入體。岩漿冷卻後結晶成呈淡粉紅灰色、細粒同部份具斑狀岩嘅花崗岩[1]。由於較圍岩抗蝕,經剝蝕後突起成為針山[2]。山上嘅鎢礦同鉬礦隨之形成。
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