buried soil meaning in English

古土壤
埋藏土壤

We sampled the palaeosol or buried soil of this section formed during the middle stage of last glacial at the interval of 10cm and totally we got 40 samples for spore - pollen analysis . we adopted the analytic procedure that is developed by mingjian wei ( personal communication ) to treat the spore - pollen samples
以10厘米为间距，在末次冰期中期发育的古土壤中采集孢粉样品40个，用魏明建等改进的孢粉分析方法进行样品的实验室分析，通过外加标志花粉的方法计算花粉浓度。