Accession Number:

AD0765745

Title:

Late Paleogene (Oligocene) and Neogene Planktonic Foraminiferal Biostratigraphy of the Atlantic Ocean (Lat. 30 Degrees N to Lat. 30 Degrees S).

Descriptive Note:

Technical rept.,

Corporate Author:

WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS

Personal Author(s):

Report Date:

1973-06-01

Pagination or Media Count:

106.0

Abstract:

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

Subject Categories:

  • Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE