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 · H₂O; S. Hovorka, pers. comm., 1996). Scale bar is 0.1 mm.