Yardang is a kind of wind erosion landform,which is a long-term adaptation to the environment.Its morphological characteristics can reflect the effect of its internal and external forces.We compared and analyzed the morphological parameters of the yardang bodies in the Elysium Planitia and the Qaidam Basin in the paper.The results show:(1)The ratio of length to width of yardang bodies in the Elysium Planitia is 3.49,which is close to that(3.57)in the Qaidam Basin and theoretical value(4).The yardang bodies ...