Pliocene of eastern England dated by North Atlantic dinoflagellate cyst stratigraphy

Author(s): Head, Martin J.; Norris, Geoffrey
Author Affiliation(s): Primary:
University of Cambridge, Department of Geography, Cambridge, United Kingdom
University of Toronto, Canada
Volume Title: Geological Society of America, 2000 annual meeting
Source: Abstracts with Programs - Geological Society of America, 32(7), p.414-415; Geological Society of America, 2000 annual meeting, Reno, NV, Nov. 9-18, 2000. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7592 CODEN: GAAPBC
Note: In English
Summary: To test the potential of dinoflagellate cysts and acritarchs for long distance correlation, DSDP Hole 603C situated on the lower continental rise off New Jersey, DSDP Hole 610A in the Rockall Trough, eastern Atlantic, and ODP Hole 646B in the Labrador Sea (de Vernal and Mudie, 1989) have been compared. Some biostratigraphic events are clearly diachronous when compared with other regions, such as the first appearance of Ataxiodinium confusum (5.1 Ma in the Mediterranean, 4.2 Ma in DSDP Hole 603C), but others have emerged which might be applicable for interregional correlation.Shallow marine, imprecisely-dated Pliocene deposits in eastern England have already been analyzed for dinoflagellates, most of which have relatively long ranges within the Pliocene. However, the oldest deposit, assigned to the Coralline Crag Formation, contains abundant Operculodinium tegillatum which has a highest common occurrence in the latest early Pliocene (ca. 3.7 Ma) in both DSDP Hole 603C and ODP Hole 646B (as O. crassum in de Vernal and Mudie, 1989). Furthermore, Algal cyst type 2 of Head (1997) which is restricted in DSDP Hole 603C to a narrow interval (4.4-3.8 Ma) within the upper lower Pliocene where it occurs abundantly, is present in the lower part of the Coralline Crag Formation. These and other datums suggest that the Coralline Crag Formation can be placed within the late early Pliocene or earliest late Pliocene. The Walton Crag of eastern England, which succeeds the Coralline Crag, has been dated by pollen analysis at between 3.0 and 2.6 Ma. Dinoflagellates of the Walton Crag are fairly diverse (more than 21 taxa) but are mostly long ranging. Impagidinium multiplexum has not been reported from the Walton Crag, yet is present/common in later Plio-Pleistocene deposits of eastern England and the southern North Sea and has a well-defined first appearance at 2.8 Ma in the western North Atlantic. Since the Walton Crag represents paleoenvironments probably favorable to this species, its absence invites speculation that these deposits predate 2.8 Ma.
Year of Publication: 2000
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; Atlantic Ocean; Biostratigraphy; Cenozoic; Coralline Crag Formation; Correlation; DSDP Site 603; DSDP Site 610; Deep Sea Drilling Project; Dinoflagellata; Eastern England; England; Europe; First occurrence; Great Britain; IPOD; Labrador Sea; Leg 105; Leg 93; Leg 94; Leg 95; Marine environment; Microfossils; Neogene; North Atlantic; North Sea; ODP Site 646; Ocean Drilling Program; Palynomorphs; Pleistocene; Pliocene; Quaternary; Range; Rockall Trough; Shallow-water environment; Tertiary; United Kingdom; Walton Crag Formation; Western Europe
Coordinates: N352939 N352940 W0700142 W0700143
N531318 N531329 W0185312 W0185342
N352939 N384432 W0700142 W0723633
N352900 N384930 W0700100 W0724700
N581236 N581236 W0482206 W0482206
Record ID: 2004012980
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