However, progress is also being made in extending the record down below the loess of the CLP into the so|called Red Clay, so that the aeolian record can now be carried back beyond 7Ma.

• 而近年来对黄土古土壤序列之下的红粘土的进一步研究显示风成堆积的开始比原先认为的要早的多 ,至少可追溯到约 7Ma。