Alluvialsediments are frequently used in Quaternary pollen studies.
冲积物是第四纪孢粉分析经常遇到的研究对象。
2
Pluvial alluvialsediments also have magnetite and hematite, but magnetite is comparatively more.
冲洪积物以磁铁矿和赤铁矿为主，磁铁矿相对较多。
3
Alluvial fan, fluvial, lake, fan delta, braid river delta and meandering river delta facies sediments are widely developed in Jurassic in Turpan-Hami basin.