Figure F68. Close-up of a whole-core photograph including very finely laminated marlstones (black shales) correlated with OAE 2. Black shales occur at 19-60 cm (i.e., extending above the interval shown) and at 74-104 cm. The interbedded sediments are greenish and grayish fine-grained calcareous sandstones and calcareous mudstones (Subunit 5A: interval 210-1276A-31R-3, 40-106 cm).