Lower Cretaceous diatoms from ODP Leg 113 Site 693 (Weddell Sea); Part 2, Resting spores, chrysophycean cysts, an endoskeletal dinoflagellate, and notes on the origin of diatoms

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doi: 10.2973/odp.proc.sr.113.201.1990
Author(s): Harwood, David M.; Gersonde, Rainer Erich
Author Affiliation(s): Primary:
Ohio State Univ., Byrd Polar Res. Cent., Columbus, OH, 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
Alfred Wegener Inst. Polar and Mar. Res., Federal Republic of Germany
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.403-425. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 85 refs.; illus. incl. 1 table, 11 plates, sketch map
Summary: This chapter describes and illustrates Lower Cretaceous diatom resting spores, Chrysophycean cysts, and an endoskeletal dinoflagellate from Holes 693A and 693B. Six new diatom genera and 20 new species of probable diatom resting spores are presented here, in addition to 10 apparently new Chrysophycean cyst taxa and one endoskeletal dinoflagellate species. Diatom assemblages reported here and in the preceding chapter on vegetative forms (Part 1) suggest that diatoms were a complex, diverse, and widespread group by late Early Cretaceous time; that diversities are high enough to anticipate the construction of a useful biostratigraphic zonation as more data become available; that there is a considerable difference between assemblages in these Albian sediments and younger Senonoan diatomites known around the world; that both resting spore formation and the ability to form chains are ancient features of the diatoms; and that diatom distribution in the Early Cretaceous may have been restricted to continental margins and interior seas, areas where resting spore formation is most common. Because these assemblages are the oldest well-preserved diatom and Chrysophycean floras known, this chapter concludes with a brief review and discussion on the origin of the diatoms, addressing both the role of resting spores and postulated links to Chrysophycean flagellates. (Auth. mod.)
Year of Publication: 1990
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Antarctic Ocean; Chrysophyta; Cretaceous; Diatoms; Dinoflagellata; Evolution; Invertebrata; Leg 113; Mesozoic; Microfossils; New taxa; ODP Site 693; Ocean Drilling Program; Palynomorphs; Plantae; Protista; Silicoflagellata; Southern Ocean; Stratigraphy; Thallophytes; Weddell Sea
Coordinates: S704954 S704954 W0143424 W0143424
Record ID: 1991051167
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States