The stratigraphy of the permafrost location as revealed by borehole and GPR data.
(a~e) GPR exploring profile #1~#5, showing the coarse block distribution in the slope. (f ) Surface peat layer with a thickness around 30 cm. This layer provides a property same as a kind of thermal semi-conductor around a year, for the tested thermal conductivity in wither time is 1–2 times of that in summer time. (e) The porous coarse block layer with an maximum thickness of 11 m and the block size ranges mainly within 5–15 cm. (h) The geological sketch map of the monitored slope and also the frozen body is zoned with blue color.