Unconformity in the South Polar Layered Deposits (SPLD) - (extra-detail mgmf - natural colors; elab. Lunexit)

The layers in the upper center/right end abruptly (truncate) at a curve in the layers that extend along the left side of the image.
This type of truncation (termed "unconformity" in Geology) is usually due to erosion, wherein the layers in the lower right were eroded, followed by later deposition of the rest of the layers on top of the older layers (layer age likely increases from left to right). It is also possible that flow of these icy layers played a part in the complicated layer geometry exhibited in this extra-detail mgnf".