Upper Cretaceous planktic foraminiferal biozonation for the Austral Realm

Author(s): Huber, Brian T.
Author Affiliation(s): Primary:
National Museum of Natural History, Department of Paleobiology, Washington, DC, United States
Volume Title: Marine Micropaleontology
Source: Marine Micropaleontology, 20(2), p.107-128. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-8398 CODEN: MAMIDH
Note: In English. 50 refs.; illus. incl. 2 tables, strat. cols., sketch maps
Summary: A new planktic foraminiferal zonal scheme is presented for subdivision of Upper Cretaceous pelagic carbonate sequences in the circum-antarctic region. Definition of the zones and subzones is based on study of foraminifera from 13 deep-sea sections that were poleward of 50S paleolatitude and within the Austral Biogeographic Realm during Late Cretaceous time. The proposed biostratigraphic scheme includes seven Upper Cretaceous zones, with an average stratigraphic resolution of 4.4 m.y., and six subzones, which are all within the Maastrichtian Stage, with an average stratigraphic resolution of 1.4 m.y. Diminished resolution in the pre-Maastrichtian sediments of southern high latitude sections results from (1) incomplete recovery of the middle Campanian, lower Santonian and most of the Cenomanian- lower Coniacian intervals; (2) presence of local and regional hiatuses; (3) paleobathymetric shallowing with increasing age at some sites, resulting in impoverished older planktic assemblages; and (4) poorer preservation with increasing burial depth. Cross- latitude correlation of the Campanian and older austral sequences may be improved with future drilling by recovery of sections that span existing stratigraphic gaps. Correlation of high latitude bioevents with chemostratigraphic events and their intercalibration with the magnetostratigraphy and the Geomagnetic Polarity Time Scale are needed for better chronostratigraphic resolution in existing high latitude sequences.
Year of Publication: 1992
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; Antarctic Ocean; Atlantic Ocean; Biostratigraphy; Cretaceous; DSDP Site 208; DSDP Site 257; DSDP Site 258; DSDP Site 264; DSDP Site 327; DSDP Site 511; Deep Sea Drilling Project; Foraminifera; IPOD; Indian Ocean; Invertebrata; Kerguelen Plateau; Leg 113; Leg 114; Leg 119; Leg 120; Leg 21; Leg 26; Leg 28; Leg 36; Leg 71; Lithostratigraphy; Lord Howe Rise; Magnetostratigraphy; Maud Rise; Mesozoic; Microfossils; Naturaliste Plateau; ODP Site 689; ODP Site 690; ODP Site 698; ODP Site 700; ODP Site 738; ODP Site 747; ODP Site 748; ODP Site 750; Ocean Drilling Program; Pacific Ocean; Paleogeography; Planktonic taxa; Protista; South American Atlantic; South Atlantic; South Pacific; Southern Ocean; Southwest Pacific; Upper Cretaceous; Weddell Sea; West Pacific; Wharton Basin
Coordinates: S704954 S614837 E0030559 W0432706
S515905 S465245 E0075341 W0330558
S684114 S492407 E0855147 E0713936
S584302 S544838 E0811426 E0762427
S570000 S370000 W0360000 W0660000
S511000 S460000 W0243000 W0470000
Record ID: 1993000188
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States