Figure F17. Close-up photograph of color banding frequently observed in Subunit IB; dark olive bands are enriched in pennate diatoms. The photograph corresponds to the base of Subunit IA (interval 202-1240A-12H-4, 83-106 cm), where this banding, typical of Subunit IB, is rare.

Figure F17. Close-up photograph of color banding frequently observed in Subunit IB; dark olive bands are enriched in pennate diatoms. The photograph corresponds to the base of Subunit IA (interval 202-1240A-12H-4, 83-106 cm), where this banding, typical of Subunit IB, is rare.