lag gravel 中文意思是什麼
lag gravel
解釋
殘積礫石-
Gold and other heavy mineral placers are notable examples of lag deposits, but gravel and boulder bars are more common.
金和其它重礦沙雖是蝕余沉積物中值得注意的例子，然而卵石和頑石沙洲都是比較普遍的。 -
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。
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