silt fraction

基本解釋

When the silt mass fraction is below the critical value, sand transport rate increases with silt mass fraction.
在低于此臨界值時(shí)，輸沙率隨粉粒的質(zhì)量分?jǐn)?shù)的增大而增大；
The contents of clay fraction and fine silt fraction decreased along the dolomite profile which developed poorly.
通過分析得出剖面特征為：發(fā)育淺薄的白云巖剖面粘粒組和細(xì)粉粒組隨剖面加深而逐漸減少；
And the sand ripples on the surface arise obviously with the increasing silt mass fraction and wind speed, but disappear as silt mass fraction exceeds 15%.
實(shí)驗(yàn)中沙波紋的高度和波長(zhǎng)隨風(fēng)速及粉粒的質(zhì)量分?jǐn)?shù)的增大而增大，而當(dāng)粉粒的質(zhì)量分?jǐn)?shù)超過15%時(shí)沙波紋消失。

The cassiterite makes up some fraction of the standard sand and river silt there.
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