Figure F27. Photomicrographs of grainstones from Unit 2 at high magnification in plane-polarized light. A. Field of view contains several whole benthic foraminifers (discoid; F) and one large broken fragment (B). Bioclastic debris above the prominent green glauconite pellet is replaced by epigenetic glauconite (E). There is a quartz-rich siltstone fragment (S) in upper left corner and a fragment of biotite schist (SH) at left, center. Note poor sorting and brownish muddy matrix (M) (Sample 210-1276A-8R-6, 69-71 cm). B. This image shows several planktonic (C, MA) and benthic (B) foraminifers. Foraminifers on left are filled with carbonate microspar (C), whereas the planktonic foraminifers to right are partly filled by muddy matrix (MA). Dark rounded clast at lower left (L) is micritic limestone (Sample 210-1276A-11R-CC, 14-17 cm).

Figure F27. Photomicrographs of grainstones from Unit 2 at high magnification in plane-polarized light. A. Field of view contains several whole benthic foraminifers (discoid; F) and one large broken fragment (B). Bioclastic debris above the prominent green glauconite pellet is replaced by epigenetic glauconite (E). There is a quartz-rich siltstone fragment (S) in upper left corner and a fragment of biotite schist (SH) at left, center. Note poor sorting and brownish muddy matrix (M) (Sample 210-1276A-8R-6, 69-71 cm). B. This image shows several planktonic (C, MA) and benthic (B) foraminifers. Foraminifers on left are filled with carbonate microspar (C), whereas the planktonic foraminifers to right are partly filled by muddy matrix (MA). Dark rounded clast at lower left (L) is micritic limestone (Sample 210-1276A-11R-CC, 14-17 cm).