Figure F86. Photomicrograph of a grainstone in which calcareous grains are primarily smaller planktonic foraminifers (f) and reworked radiolarians (R), some with spines. The former are filled by colorless microspar, and the latter are filled and locally coated by darker micrite. Fine micrite (m) to microspar (S) between grains is likely siderite, according to XRD analyses of nearby sediments from this section (Subunit 5B: Sample 210-1276A-41R-2, 88-91 cm).

Figure F86. Photomicrograph of a grainstone in which calcareous grains are primarily smaller planktonic foraminifers (f) and reworked radiolarians (R), some with spines. The former are filled by colorless microspar, and the latter are filled and locally coated by darker micrite. Fine micrite (m) to microspar (S) between grains is likely siderite, according to XRD analyses of nearby sediments from this section (Subunit 5B: Sample 210-1276A-41R-2, 88-91 cm).