Biostratigraphy and palaeobiogeography of the Gregory Member (Campanian) of the Western Interior Basin, South Dakota

Author(s): Hadavi, Fatemeh
Author Affiliation(s): Primary:
Ferdowsi University of Mashhad, Department of Geology, Mashhad, Iran
Volume Title: Journal of Nannoplankton Research
Source: Journal of Nannoplankton Research, 24(1), p.9-13. Publisher: International Nannoplankton Association, The Hague, International. ISSN: 1210-8049
Note: In English. 18 refs.; 1 plate, 1 table, sketch map
Summary: A biostratigraphic study of calcareous nannofossils from the Gregory Member of the Western Interior Basin (South Dakota) has allowed the recognition of two calcareous nannofossil biozones of Sissingh (1977)-CC20 and CC21, equivalent to subzones UC15bTP and UC15cTP of Burnett (1998). These biozones span the Early/Late Campanian boundary interval (Sissingh, 1977). The upper part of the Gregory Member has been compared to two coeval samples from the Gulf of Mexico (DSDP Hole 538A) in order to attempt a palaeoecological analysis. The similarities in nannofossil richness and nannofloral composition indicate that there was open communication between the two sites. Differences in the patterns of nannofossil abundance observed in these two basins are shown to be related to palaeolatitude rather than preservation.
Year of Publication: 2002
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Atlantic Ocean; Basins; Biogeography; Biostratigraphy; Campanian; Cretaceous; DSDP Site 538; Deep Sea Drilling Project; Floral list; Gregory Member; Gulf of Mexico; IPOD; Leg 77; Mesozoic; Microfossils; Morphology; Nannofossils; North America; North Atlantic; Pierre Shale; Plantae; Preservation; Roberts County South Dakota; Senonian; Sisseton South Dakota; South Dakota; United States; Upper Cretaceous; Western Interior
Coordinates: N235058 N235059 W0852737 W0852738
N452000 N455500 W0963000 W0971500
Record ID: 2004059540
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.