向上变细的 meaning in English

upward-fining

Upward-fining channels may occur in a wide range of environments, from submarine canyon to alluvial fan .
向上变细的水道可以出现在好多种环境中，从海底峡谷到冲积扇。
The results show that there are many sedimentary facies in cretaceous of study area , such as alluvial fan with disorderly deposits , river with positive cycle , delta with middling maturity of petro composition and texture , and coastal and shallow lake sub - facies with deposits of thin multilateral mottle sand and shale
结果表明，研究区白垩系主要发育的沉积相类型有：杂乱堆积的冲积扇相；纵向上呈粒度向上变细的河流相；中等成分成熟度和结构成熟度的三角洲相；杂色砂泥岩呈薄互层沉积的滨浅湖亚相。
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
根据岩石学、沉积结构和沉积构造特征，本区下切河谷充填沉积物具有向上变细的沉积层序，可以划分为4个沉积相类型：河床滞留沉积物到部分曲流河沉积体系的边滩沉积、河漫滩河口湾沉积、河口湾浅海沉积和河口湾砂坝沉积。