Figure F5. Examples of foraminifer nannofossil chalk in Unit III. A. Contact between gray nannofossil chalk of Unit II and brownish foraminifer nannofossil chalk of unit III; contact is at 92 cm. The green laminae at 99-102 and 107-109 cm are diagenetic glauconite (interval 183-1139A-40R-5, 83-115 cm). B. Lower portion of Unit III (interval 183-1139A-40R-6, 15-35 cm). C. Lower portion of Unit III (interval 183-1139A-40R-6, 73-94 cm).