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海蝕平臺 .
海蝕平臺形成示意圖 海蝕平臺 ,又稱浪蝕臺 、波蝕棚 、海蝕平原 (英語:Wave-cut bench ),是海邊懸崖 下或是大湖岸邊的一個狹扁的平臺。
平台形成的時間長久,過程可參見上側圖示,一開始海崖受到海浪 沖刷,在海面高低潮線的位置向岩壁侵蝕(海蝕 ),形成凹洞。之後,凹洞會漸漸形成較深的洞穴,在海水的持續沖刷下,洞穴無法承受上方海崖的重量而崩落,崩落後的石塊也因海水沖刷碎成小石塊,被海水帶走,最後才形成平臺。
海蚀平台一般向海倾斜,其宽度与波浪 作用的强度有关,波浪作用强的地方海蚀平台宽度大,其表面并不平坦,有时有海蚀留下的海蚀柱 、礁石 、浪蚀沟等。
藉由觀察古時形成的平臺,地質學 家們可得知當時的海面或湖面高度,另外再藉由科學鑑定方法或檢定海洋化石,他們能確定平臺形成的時間。英國 的地質學家就是利用此方法來估算陸地上升的速度。
海岸地理
地形 灘
Beach cusps
Beach evolution
海灘地形動力學
濱堤
海灘岩
Pocket beach
Raised beach
Recession
Shell beach
石灘
Storm beach
Wash margin
機制
吹蝕穴
海蝕崖
海岸生物地理形態學
海岸侵蝕
Concordant coastline
水流
Cuspate foreland
Discordant coastline
離水海岸
Feeder bluff
吹程
平垣海岸
Graded shoreline
Headlands and bays
Ingression coast
大規模海岸行為
沿岸流
Marine regression
Marine transgression
Raised shoreline
離岸流
Rocky shore
海蝕洞
海泡
沙洲
陡岸
下沉海岸
Surf break
Surf zone
Surge channel
沖洗
回捲
火山弧
海蝕平臺
Wave shoaling
海浪
Wrack zone
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