sentences:  Many craters at equatorial and mid-latitudes on Mars have this form of ejecta morphology, which is thought to arise when the impacting object melts ice in the subsurface.Liquid water in the ejected material forms a muddy slurry that flows along the surface, producing the characteristic lobe shapes.The presence of a pre-existing, partially buried crater on Yuty’s southwestern rim is evidence that the ejecta is thin.