Figure F1. A, B. Horizontally laminated calcareous sandstone (Sample 210-1276A-21R-4, 108–117 cm); (A) digital image of split surface; (B) 2-D X-ray image. Split surface and X-ray images are taken from similar directions. C, D. Trough cross-laminated sandstone (Sample 210-1276A-44R-5, 27–36 cm); (C) digital image of split surface; (D) 2-D X-ray image. Split surface and X-ray images may be offset by 90° or more.