Plate 1. Photomicrographs. 1. General view of foraminiferal-nannofossil chalk. Section 161-975B-33X-2, 3-4 cm. Scale bar is 0.1 mm. 2. Black (tachylitic) microlitic and lathwork volcanic lithic fragments. Section 975B-33X-3, 143-144 cm. Scale bar is 0.1 mm. 3. Carbonate lithic fragment exhibiting pelletal to oncolitic(?) texture. Section 975B-33X-3, 143-144 cm. Scale bar is 0.1mm. 4. Carbonate lithic fragment of calcarenite with drusy rim cement. Section 975B-33X-3, 143-144 cm. Scale bar is 0.2 mm. 5. General view of matrix-supported sandy biomicrite. Section 975B-33X-CC, 3-5 cm. Scale bar is 0.1 mm. 6. Two fragments of shale/siltstone in matrix-rich area. Section 975B-33X-CC, 3-5 cm. Scale bar is 0.05 mm.

Plate 1. Photomicrographs. 1. General view of foraminiferal-nannofossil chalk. Section 161-975B-33X-2, 3-4 cm. Scale bar is 0.1 mm. 2. Black (tachylitic) microlitic and lathwork volcanic lithic fragments. Section 975B-33X-3, 143-144 cm. Scale bar is 0.1 mm. 3. Carbonate lithic fragment exhibiting pelletal to oncolitic(?) texture. Section 975B-33X-3, 143-144 cm. Scale bar is 0.1mm. 4. Carbonate lithic fragment of calcarenite with drusy rim cement. Section 975B-33X-3, 143-144 cm. Scale bar is 0.2 mm. 5. General view of matrix-supported sandy biomicrite. Section 975B-33X-CC, 3-5 cm. Scale bar is 0.1 mm. 6. Two fragments of shale/siltstone in matrix-rich area. Section 975B-33X-CC, 3-5 cm. Scale bar is 0.05 mm. Click on image for enlargement.