Figure F21. Photomicrograph of the remarkably good preservation of lower Miocene planktonic foraminifers at Site U1405 revealing semiglassy taphonomy and even the presence of relict spines within the umbilici. The first appearance of Paragloborotalia kugleri marks the base of Subzone M1a, ~70 k.y. after the Oligocene/Miocene boundary (Samples 342-U1405A-13H-6, 100–102 cm; 15H-2, 100–102 cm; 15H-CC; and 16H-CC).
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