Traversing back to Mt. Rea from The Billboard, a magnificent chunk of Late Cretaceous Byrd Coast Granite at western end of Sarnoff Mountains. It has shear walls except for ramp in centre of picture. Right is Arthur Glacier & left is Boyd Glacier. Sulzberger Ice Shelf in background. The summit slopes of Billboard are a very old erosion surface. W.Antarctica.: Louis Sass: Arctic & Antarctic photographs, pictures & images from Bryan & Cherry Alexander Photography.