Planktonic foraminifer biostratigraphy of Campanian-Maestrichtian sediments from Sites 698 and 700, southern South Atlantic

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doi: 10.2973/odp.proc.sr.114.181.1991
Author(s): Huber, Brian T.
Author Affiliation(s): Primary:
North. Ill. Univ., Dep. Geol., DeKalb, IL, United States
Other:
Univ. Bergen, Norway
Ocean Drill. Program, United States
Stanford Univ., United States
Univ. Pau, France
Br. Pet. Co., United Kingdom
Christian-Albrechts Univ. Kiel, Federal Republic of Germany
Lamont-Doherty Geol. Obs., United States
Univ. Southampton, United Kingdom
North. Ill. Univ., United States
Woods Hole Oceanogr. Inst., United States
Geol. Inst., Switzerland
Geol. Surv. Can., Canada
Univ. Waterloo, Canada
Univ. Perugia, Italy
Calif. State Univ. at Hayward, United States
Alfred Wegener Inst. Polar und Meeresforschung, Federal Republic of Germany
Volume Title: Subantarctic South Atlantic; covering Leg 114 of the cruises of the drilling vessel JOIDES Resolution, East Cove, Falkland Islands, to Port Louis, Mauritius, Sites 698-704, 11 March 1987-13 May 1987
Volume Author(s): Ciesielski, Paul F.; Kristoffersen, Yngve; Clement, Bradford M.; Blangy, Jean-Pierre; Bourrouilh, Robert; Crux, Jason A.; Fenner, Juliane M.; Froelich, Philip N.; Hailwood, Ernest A.; Hodell, David A.; Katz, Miriam E.; Ling, Hsin Yi; Mienert, Jürgen; Müller, Daniel W.; Mwenifumbo, C. Jonathan; Nobes, David C.; Nocchi, Marisa; Warnke, Detlef A.; Westall, Frances
Source: Subantarctic South Atlantic; covering Leg 114 of the cruises of the drilling vessel JOIDES Resolution, East Cove, Falkland Islands, to Port Louis, Mauritius, Sites 698-704, 11 March 1987-13 May 1987, Paul F. Ciesielski, Yngve Kristoffersen, Bradford M. Clement, Jean-Pierre Blangy, Robert Bourrouilh, Jason A. Crux, Juliane M. Fenner, Philip N. Froelich, Ernest A. Hailwood, David A. Hodell, Miriam E. Katz, Hsin Yi Ling, Jürgen Mienert, Daniel W. Müller, C. Jonathan Mwenifumbo, David C. Nobes, Marisa Nocchi, Detlef A. Warnke and Frances Westall. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.114, p.281-297. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 32 refs.; illus. incl. 3 plates, 4 tables, sketch map
Summary: Site 698 penetrated 72.5 m of Campanian-Maestrichtian chalk and limestone with only 18.2% recovery, whereas Site 700 recovered 66.8% of a 152.7 m section of Coniacian-Maestrichtian limestone. Preservation of planktonic foraminifers from both sites is moderate in Maestrichtian samples, but worsens with increasing depth in the Campanian. The Northeast Georgia Rise planktonic foraminifers are typical of Late Cretaceous Austral Province faunas described from other southern high-latitude sites; species diversity is low and the assemblages are dominated by species of Heterohelix, Globigerinelloides, Hedbergella, and Archaeoglobigerina. Five species are considered to be endemic to the Austral Province. Formation of a cool temperate water mass in the circum-antarctic region, resulting from the final breakup of the Gondwana continents, may have led to increased provincialism of the Austral Province planktonic foraminifers during Campanian-Maestrichtian time. Magnetobiostratigraphic correlation of eight planktonic foraminifer datum events at Hole 700B with ages determined for datums at ODP Leg 113 Holes 689B and 690C (Maud Rise, 65S) demonstrates regional synchroneity of first and last occurrences within the Austral Province. As was observed at the Maud Rise, several keeled and nonkeeled species previously thought to have been restricted to warmer low-latitude regions first occur later at the Northeast Georgia Rise than at the low-latitude sites. The causes for high-latitude diachroneity among these immigrant species are not clear. (Auth. mod.)
Year of Publication: 1991
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Biostratigraphy; Campanian; Cretaceous; Foraminifera; Georgia Rise; Invertebrata; Leg 114; Maestrichtian; Marine geology; Mesozoic; Microfossils; ODP Site 698; ODP Site 700; Ocean Drilling Program; Oceanography; Planktonic taxa; Protista; Senonian; South Atlantic; Stratigraphy; Upper Cretaceous
Coordinates: S512731 S512731 W0330558 W0330558
S513200 S513200 W0301642 W0301642
Record ID: 1991017151
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