青藏高原海拔4000 m区域人类活动的新证据
侯光良, 曹广超, 鄂崇毅, 任晓燕, 李凡

New evidence of human activities at an altitude of 4000 meters area of Qinghai-Tibet Plateau
Guangliang HOU, Guangchao CAO, Chongyi E, Xiaoyan REN, B Wuennemann, Fan LI
图5 灰烬层扫描电镜影像
Fig.5 The photos of ash layer in section XDW1 by scanning electron microscope (SEM)