Plate 3. Photomicrographs. 1. Planar-wavy lamina with clastic texture (lower part of picture) is overlain by dark, matrix-rich lamina with detrital gypsum. Lenticular crystals are present in both laminae. Section 161-975B-33X-CC, 15-19 cm. Scale bar is 0.

Plate 3. Photomicrographs. 2. Coarse, interlocking crystals of gypsum in lower half of picture are the uppermost part of a planar-cumulus lamina overlain by a dark, matrix lamina with detrital gypsum. Section 975B-33X-CC, 22-27 cm. Scale bar is 0.1 mm.