In vertical direction, the existence of isolated barrier bed may result in the formation of multiple vertical sequence units, and the development of interlayer oxidation zone and uranium roll.

在垂向上，隔挡层的存在可以导致多个垂向序列单元、层间氧化带和铀矿卷头的发育。

youdao

Uranium mineralisation occurs in coarse sandstones between clay horizons within a braided channel system with apparent tabular and roll front deposit characteristics.

铀矿化带出现在粗粒砂岩内，其介于粘土层之间，位于网状河道体系内，具有明显的板状和卷状矿床特征。

youdao

Berman says the legislation would be only one point of pressure on Iran to roll back its uranium-enrichment program, which the United States believes is aimed at producing a nuclear weapon.

VOA: standard.2009.10.28