Plate 2. Photomicrographs. 1. Gypsiferous chalk with sparse, whole foraminifers, Section 161-975B-34X-2, 7-11 cm. Apparent zoning is likely an artifact of sample preparation where the gypsum is altering to bassanite (CaSO4 ·

Plate 2. Photomicrographs. 4. Clastic interval containing fragments of lenticular gypsum within crenulated gypsum zone pictured in Figure 6. Section 975B-34X-CC, 15-19 cm. Scale bar is 0.2 mm.