Hadavi, Fatemeh (2002): Biostratigraphy and palaeobiogeography of the Gregory Member (Campanian) of the Western Interior Basin, South Dakota

Leg/Site/Hole:
DSDP 77
DSDP 77 538
Identifier:
2004-059540
georefid
Creator:
Hadavi, Fatemeh
Ferdowsi University of Mashhad, Department of Geology, Mashhad, Iran
author
Identification:
Biostratigraphy and palaeobiogeography of the Gregory Member (Campanian) of the Western Interior Basin, South Dakota
2002
Journal of Nannoplankton Research
International Nannoplankton Association, The Hague, International
24
1
9-13
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 UC15b (super TP) and UC15c (super TP) 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.
English
Serial
Coverage:Geographic coordinates:
North:45.5500
West:-97.1500East: -85.2737
South:23.5058
Stratigraphy; algae; Atlantic Ocean; basins; biogeography; biostratigraphy; Campanian; Cretaceous; Deep Sea Drilling Project; DSDP Site 538; 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;
.