Figure 2.

(a) Sketch of a hypothetical area on Europa with typical cross‐cutting tectonic features, created as an example to illustrate the details of plate definition and reconstruction. See text for discussion of lettered features. (b) Plates that would be defined based on this set of features. During any particular time step, the moving plate consists of one or more of these plates acting together. Only features W, X, and Y offset pre‐existing features, and so they define the edges of the moving plates, colored in purple. Feature Z is ignored for further analysis because it does not offset any features and postdates all plate boundaries.