gravel bar 中文意思是什麼

gravel bar 解釋
礫石壩
  • gravel : n 1 〈集合詞〉砂礫，礫石。2 【地質學；地理學】砂石，礫。 gravel bed 礫層。3 【醫學】尿砂。vt （〈...
  • bar : BAR ＝ Browning automatic rifle 白朗寧自動步槍。n 巴爾〈南斯拉夫港市〉。n 1 棒，桿，條；棒狀物。2...
  1. The sediments of the incised valleys show an upward - fining succession, and can be grouped into four sedimentary fades : gravel lag - deposit of in - channel to partly over bank sediments of a meandering river, flood plain - estuary, estuary - shallow marine, and estuary sand bar, based on lithology, paleontology, and sedimentary textures and structures

    根據巖石學、沉積結構和沉積構造特徵，本區下切河谷充填沉積物具有向上變細的沉積層序，可以劃分為4個沉積相類型：河床滯留沉積物到部分曲流河沉積體系的邊灘沉積、河漫灘河口灣沉積、河口灣淺海沉積和河口灣砂壩沉積。
  2. Indeed, the jack hills zircons ? separated by perhaps thousands of kilometers from their source ? were found embedded in a fossilized gravel bar called the jack hills conglomerate

    事實上，在傑克丘發現的鋯石，就是深埋在名為傑克丘礫巖的化石砂礫層里，而它們很可能是從幾千公里遠的地方被帶到那裡的。
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