Figure 4: Comparison of high resolution (32 m/pixel) imaging within the RegMap02 region (left side), and the same location at 235 m/pixel. Even areas that appear simply as smooth depressions at 235m resolution prove to chaos regions when imaged more closely. Thus mapping (Fig. 3) is conservative in the sense that there is even more chaotic terrain on Europa that we have not shown in our map, because it has too smooth a matrix or is too small for matrix texture to be recognizable at this resolution.