(a) showing unudulating Contact between L and F1 (brown arrows), with F1 embaying L.
. See text for discussion.
Inset (black rectangle) shows marginal graben on F1.
Sinuous ridges interpreted as inverted channels 
(example: white arrow) superpose sheet of yardang-bearing material.

(b) showing topographic relationships near L-F1 contact (brown line). 
White arrows highlight points along the contact where
F1 locally overlies L.Color range is -2250m (red) to -2470m (white).