岩溶残余堆积物后期又经历红土化作用，造就了红粘土的基本特征。
The later period of karst corrosion deposit experienced lateritization, had accomplished the red clay basic characteristic.
与第三纪时期准平原化相伴的红土化、类红土化作用，使基岩中的微量金富集到具有经济价值的程度。
The lateritization and other similar agents accompanied by Tertiary peneplanation enrich the trace amount of gold in basement rocks to a commercially significant extent.
湘南地区红土化作用强烈，土状锰铁矿分布广，蕴藏量巨大，矿石易采难选，长期被当作地下“黑土”。
Because of red soil process strongly, earthy manganese-iron deposits widely distribute, resources are huge, ores are easily exploited and difficultly beneficiated, regarded as black soil long term.
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