Bolboforma Daniels and Spiegler, from Eocene and lower Oligocene sediments, Maud Rise, Antarctica

Online Access: Get full text
doi: 10.2973/odp.proc.sr.113.208.1990
Author(s): Kennett, Diana M.; Kennett, James P.
Author Affiliation(s): Primary:
Univ. Calif. at Santa Barbara, Mar. Sci. Inst., Santa Barbara, CA, United States
Other:
Univ. R.I. at Narragansett, United States
Ocean Drilling Program, United States
Tex. A&M Univ., United States
Lamont-Doherty Geol. Obs., United States
Univ. Oslo, Norway
Alfred Wegener Inst. Polar and Ocean Res., Federal Republic of Germany
Univ. Southampton, United Kingdom
Univ. Tex. at Austin, United States
Woods Hole Oceanogr. Inst., United States
Fed. Inst. Tech., Switzerland
Univ. Tokyo, Japan
Mem. Univ. Newfoundland, Canada
CNRS-Luminy, France
R. Ont. Mus., Canada
Univ. Bremen, Federal Republic of Germany
Wesleyan Univ., United States
Fla. State Univ., United States
Volume Title: Proceedings of the Ocean Drilling Program, Weddell Sea, Antarctica, covering Leg 113 of the cruises of the Drilling Vessel JOIDES Resolution, Valparaiso, Chile, to East Cove, Falkland Islands, sites 689-697, 25 December 1986-11 March 1987
Volume Author(s): Barker, Peter F.; Kennett, James P.; O'Connell, Suzanne B.; Berkowitz, Stephen; Bryant, William R.; Burckle, Lloyd H.; Egeberg, Per Kristian; Fütterer, Dieter Karl; Gersonde, Rainer Erich; Golovchenko, Xenia; Hamilton, Norman; Lawver, Lawrence; Lazarus, David B.; Lonsdale, Malcolm J.; Mohr, Barbara A. R.; Nagao, Toshiyasu; Pereira, Christopher P. G.; Pudsey, Carol J.; Robert, Christian M.; Schandl, Eva S.; Spiess, Volkhard; Stott, Lowell D.; Thomas, Ellen; Thompson, Keith F. M.; Wise, Sherwood W., Jr.; Kennett, Diana M.; Masterson, Amanda; Stewart, Norman J.
Source: Proceedings of the Ocean Drilling Program, Weddell Sea, Antarctica, covering Leg 113 of the cruises of the Drilling Vessel JOIDES Resolution, Valparaiso, Chile, to East Cove, Falkland Islands, sites 689-697, 25 December 1986-11 March 1987, Peter F. Barker, James P. Kennett, Suzanne B. O'Connell, Stephen Berkowitz, William R. Bryant, Lloyd H. Burckle, Per Kristian Egeberg, Dieter Karl Fütterer, Rainer Erich Gersonde, Xenia Golovchenko, Norman Hamilton, Lawrence Lawver, David B. Lazarus, Malcolm J. Lonsdale, Barbara A. R. Mohr, Toshiyasu Nagao, Christopher P. G. Pereira, Carol J. Pudsey, Christian M. Robert, Eva S. Schandl, Volkhard Spiess, Lowell D. Stott, Ellen Thomas, Keith F. M. Thompson, Sherwood W. Wise, Jr., Diana M. Kennett, Amanda Masterson and Norman J. Stewart. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.113, p.667-673. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 17 refs.; illus. incl. 2 tables, 1 plate, sketch map
Summary: Five species of Bolboforma have been found in middle Eocene to lower Oligocene sediments from Maud Rise, the first reported Bolboforma from the antarctic Paleogene. Highest species diversity of Bolboforma in the Weddell Sea occurred during the late Eocene, after which all but one important species disappeared before the Eocene/Oligocene boundary (36.5 Ma). The remaining species, B. irregularis, disappeared soon after, during the earliest Oligocene. The disappearance of Bolboforma in the region of Antarctica coincided with significant climatic cooling that occurred at the end of the Eocene and during the earliest Oligocene, when subpolar replaced temperate conditions. Bolboforma is not known from younger sediments in the Antarctic except for a brief interval during the late early Miocene, an interval of Neogene climatic warmth. The presence of Bolboforma in Eocene to lower Oligocene sequences in the Weddell Sea is therefore consistent with this taxon's previously recognized association with temperate water masses. Bolboforma is of limited biostratigraphic value at present, because of relatively long stratigraphic ranges and diachronous extinctions. A new species Bolboforma antarctica, is described, exhibiting a stratigraphic range from middle middle Eocene to the upper Eocene (approximately 44 to 39 Ma). (Auth. mod.)
Year of Publication: 1990
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Antarctic Ocean; Biostratigraphy; Bolboforma; Cenozoic; Eocene; Hole 689B; Hole 690B; Leg 113; Lower Oligocene; Maud Rise; Microfossils; New taxa; ODP Site 689; ODP Site 690; Ocean Drilling Program; Oligocene; Paleoclimatology; Paleogene; Problematic fossils; Problematic microfossils; Southern Ocean; Stratigraphy; Tertiary; Weddell Sea
Coordinates: S643100 S643100 E0030600 E0030600
Record ID: 1991051180
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States