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) : Berggren,W. A. ; Amdurer,M.

Report Date : JUN 1973

Pagination or Media Count : 106

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)

Descriptors :   (*STRATIGRAPHY, *ATLANTIC OCEAN), SEDIMENTATION, MARINE GEOLOGY, OCEAN BOTTOM

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE