Figure F48. Photomicrographs in plane-polarized light showing examples of foraminifers from Unit 3. A. Keeled planktonic foraminifer (Globotruncana orientalis) of middle to late Maastrichtian age (center top) in Paleocene grainstone. Darker area is a sedimentary lithic clast (Sample 210-1276A-17R-4, 98-99 cm). B. Grainstone with large yellow phosphatic (P) grains (fecal pellets?) surrounded by a wide variety of planktonic foraminifers and other bioclastic debris, set in a darker clay matrix. Some foraminifers are partly filled by carbonate cement and pyrite (Sample 210-1276A-18R-6, 88-99 cm).

Figure F48. Photomicrographs in plane-polarized light showing examples of foraminifers from Unit 3. A. Keeled planktonic foraminifer (Globotruncana orientalis) of middle to late Maastrichtian age (center top) in Paleocene grainstone. Darker area is a sedimentary lithic clast (Sample 210-1276A-17R-4, 98-99 cm). B. Grainstone with large yellow phosphatic (P) grains (fecal pellets?) surrounded by a wide variety of planktonic foraminifers and other bioclastic debris, set in a darker clay matrix. Some foraminifers are partly filled by carbonate cement and pyrite (Sample 210-1276A-18R-6, 88-99 cm).