Morphological comparison of blocks in chaos terrains on Pluto, Europa, and Mars

Chaos terrains are characterized by disruption of preexisting surfaces into irregularly arranged mountain blocks with a chaotic appearance. Several models for chaos formation have been proposed, but the and evolution this enigmatic terrain type has not yet fully constrained. We provide extensive mapping individual that make up different landscapes, present morphological comparison found on Pluto, Jupiter's moon Europa, Mars, using measurements diameter, height, axial ratio blocks. Additionally, we compare in fretted Mars. find positive linear relationship between size height Pluto whereas Europa exhibit flat trend as block does generally increase increasing size. Block heights used to estimate root depths if they were floating icebergs. infer total thickness icy layer from which formed. Finally, Mars compared potential thicknesses near-surface material. propose can be information about crustal lithology surface thickness.