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清水斷層

清水斷層是台灣的一條斷層,根據經濟部中央地質調查所2000年的資料,將清水斷層列為存疑性活動斷層,該斷層屬於逆移斷層盲斷層),位於臺中市甲南經清水沙鹿,東北走向,沙鹿以南為北北東,龍井以南呈北北西,東北走向斷層跡略為弧形,長約22km[1][2]。清水斷層向北延伸接后里台地西緣之大甲斷層,向南延伸則沿八卦台地西緣的彰化斷層。沿此斷層跡有豐富而良質之泉水湧出。依震測結果推測大肚台地西緣有兩段呈雁行排列之正斷層。

由清水東南方的鹿峰到沙鹿南方3公里的鷺山之間,有明顯的斷層小崖,其餘地區多呈引曳崖,在鹿峰國小附近出露明顯之拖曳構造;本斷層切過一些全新世所形成的地形面,如鹿峰沖積扇及南勢沖積扇,造成崖高2公尺餘之斷層小崖,為大肚台地西緣的主斷層;由依其附生的斷層地形和拖曳構造研判,為東側隆起的逆斷層。 未在清水斷層沿線發現斷層露,本斷層可能為盲斷層

大肚台地北段西緣與清水隆起海岸平原的交界線形極為明顯,區內水系均一致向西南西流;然而在台地的中部及南部,水系大抵向西呈現放射狀水系,台地沖積層的交界較不明顯,也無明顯的線形特徵。

經濟部中央地質調查所於2010年版的「2萬5千分之一活動斷層圖」出版時將清水斷層併入大甲斷層[3]

參考資料

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  1. ^ 沙鹿區-地質. 台中市沙鹿區公所. [2018-02-07]. (原始内容存档于2018-02-08) (中文(臺灣)). 
  2. ^ 大肚台地. 中華民國文化部《台灣大百科》. [2018-02-07]. (原始内容存档于2020-10-28) (中文(臺灣)). 
  3. ^ 經濟部中央地質調查所 活動斷層分類準則[永久失效連結]

外部連結

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清水斷層
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