Late Paleogene (Oligocene) and Neogene Planktonic Foraminiferal Biostratigraphy of the Atlantic Ocean (Lat. 30 Degrees N to Lat. 30 Degrees S).
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1973
- Accession Number
- AD0765745
Entities
People
- M. Amdurer
- W. A. Berggren
Organizations
- Woods Hole Oceanographic Institution