Chronostratigraphic applications of Pliocene and lower Pleistocene dinoflagellates and acritarchs in the North Atlantic region

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doi: 10.1306/1D9BDB5F-172D-11D7-8645000102C1865D
Author(s): Head, Martin J.; Norris, Geoffrey
Author Affiliation(s): Primary:
University of Toronto, Department of Geology, Toronto, ON, Canada
Volume Title: AAPG international conference and exhibition; abstracts
Source: AAPG Bulletin, 82(10), p.1923; AAPG international conference and exhibition, Rio de Janeiro, Brazil, Nov. 8-11, 1998. Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States. ISSN: 0149-1423 CODEN: AABUD2
Note: In English
Summary: Several Deep Sea Drilling Project (DSDP) holes with excellent magneto-stratigraphic and biostratigraphic control have been analyzed for their dinoflagellate and acritarch content. Results confirm the applicability of dinoflagellates and acritarchs for high resolution biostratigraphy of the Pliocene. DSDP Hole 603C, situated on the lower continental rise off New Jersey, has an essentially complete Pliocene and lowermost Pleistocene sedimentary record. DSDP Hole 610A, in the Rockall Trough, eastern Atlantic, has an almost complete section spanning middle lower Pliocene through lower Pleistocene. Ocean Drilling Program Hole 646B in the Labrador Sea offers a third point of comparison. Biostratigraphically useful events recognized for the lower lower Pliocene include the highest occurrences (HO) of Pyxidinopsis pastilliformis and Cristadinium diminutivum; for the middle lower Pliocene include lowest occurrence Corrudinium sp. 1 of de Vernal and Mudie 1989, highest persistent occurrence (HPO) of Reticulatosphaera actino-coronata, and the HO of Cyst type 1 of de Vernal and Mudie 1989; and for the upper lower Pliocene include the HPO of the Batiacasphaera micropapillata/B. minuta complex. The lower upper Pliocene (Gauss magnetochron) is characterized by the highest occurrences of many taxa including Edwardsiella sexispinosa and Invertocysta tabulata. The upper upper Pliocene is marked by the HCO of Cymatiosphaera? invaginata. Some magnetostratigraphically-calibrated dinoflagellate events can be recognized within the Plio-Pleistocene of the southern North Sea basin where they improve the chronostratigraphy of these imprecisely-dated, restricted marine deposits.
Year of Publication: 1998
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Acritarchs; Applications; Atlantic Ocean; Batiacasphaera micropapillata; Biostratigraphy; Calibration; Cenozoic; Chronostratigraphy; Cristadinium diminutivum; Cymatisosphaera invaginata; DSDP Site 603; DSDP Site 610; Deep Sea Drilling Project; Dinoflagellata; Gauss Chron; IPOD; Leg 105; Leg 93; Leg 94; Leg 95; Lower Pleistocene; Magnetostratigraphy; Marine environment; Neogene; North Atlantic; North Sea; ODP Site 646; Ocean Drilling Program; Paleomagnetism; Palynomorphs; Pleistocene; Pliocene; Pyxidinopsis pastilliformis; Quaternary; Rockall Trough; Tertiary
Coordinates: N352939 N352940 W0700142 W0700143
N531318 N531329 W0185312 W0185342
N352939 N384432 W0700142 W0723633
N352900 N384930 W0700100 W0724700
N581236 N581236 W0482206 W0482206
Record ID: 1998064713
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States