Chemical weathering was beginning to attack the unweathered bedrock.
化学侵蚀作用开始攻击还未侵蚀的岩床。
The zircon samples were fresh and unweathered. The rock is coarse-grained biotite monzogranite.
所测锆石样品新鲜、未风化，岩性为粗粒黑云母二长花岗岩。
Horizon C is relatively unweathered parent material form which the mineral components of the above layers are derived.
C 水平层是相对未风化的母质土，其它层的矿物都源于此。
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