Late Paleogene (Oligocene) and Neogene Planktonic Foraminiferal Biostratigraphy of the Atlantic Ocean (Lat. 30 Degrees N to Lat. 30 Degrees S).
WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS
Pagination or Media Count:
Approximately 120 planktonic foraminiferal species are recorded from late Paleogene Oligogene Oligocene and Neogene sediments recovered by the Deep Sea Drilling Project Legs 1-4 between lat. 30 degrees N and lat. 30 degrees S in the Atlantic Ocean. Particularly good oligocene and lower Miocene biostratigraphic sequences were recovered in the South Atlantic Leg 3 and a nearly complete composite succession of Neogene sediments has been examined from the tropical Atlantic Caribbean, Legs 4 and 15 Gulf of Mexico, Leg 1. South Atlantic late Paleogene and early Neogene planktonic foraminiferal assemblages exhibit a marked similarity with those from the Australasian region New Zealand, SW Pacific. South Atlantic early Neogene assemblages are characterized by globigerinids, globoquadrinids and non-keeled globorotaliids. Late Neogene tropical assemblages are dominated by keeled globorotaliids. Within the Pliocene the sequential extinction of several taxa make a refinement of current planktonic foraminiferal zonation zonation possible and a six-fold zonation Zones p11-6 is applied. Author
- Geology, Geochemistry and Mineralogy