Assessing the accuracy of fossil datum levels; Globorotalia margaritae Foraminiferida, a Pliocene test case

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doi: 10.1144/jm.9.2.225
Author(s): Weaver, P. P. E.; Bergsten, H.
Author Affiliation(s): Primary:
Institute of Oceanographic Sciences, Godalming, United Kingdom
Other:
University of Goteborg, Sweden
Volume Title: Journal of Micropalaeontology
Source: Journal of Micropalaeontology, 9(2), p.225-231. Publisher: British Micropalaeontological Society, London, United Kingdom. ISSN: 0262-821X
Note: In English. 33 refs.; illus., incl. 1 table, sketch map
Summary: The stratigraphic distribution of the planktonic foraminiferal species Globorotalia margaritae has been determined in 34 DSDP, ODP and piston core sites from throughout the world's oceans and from one land section. All these sites have good palaeomagnetic records, and thus the age of the first and last appearance of G. margaritae can be determined in each case. The results show strong diachronism and indicate that this is not a good species to use for correlation. There appears to be no simple explanation for this diachronism, dissolution is probably a contributing factor in the deeper sites, and the edges of the geographical range of the species show shorter stratigraphic ranges but these factors do not explain all the data. We suggest that diachronism in planktonic foraminifera may be common, but without global arrays of palaeomagnetically dated cores it will be very difficult to distinguish reliable species from unreliable ones.
Year of Publication: 1991
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; Atlantic Ocean; Biostratigraphy; Cape Verde Basin; Cape Verde Rise; Caribbean Sea; Cenozoic; Chatham Rise; DSDP Site 132; DSDP Site 296; DSDP Site 310; DSDP Site 397; DSDP Site 502; DSDP Site 516; DSDP Site 519; DSDP Site 587; DSDP Site 588; DSDP Site 590; DSDP Site 591; DSDP Site 592; DSDP Site 594; DSDP Site 603; DSDP Site 606; DSDP Site 607; DSDP Site 609; DSDP Site 610; DSDP Site 611; Deep Sea Drilling Project; Equatorial Atlantic; Extinction; First occurrence; Foraminifera; Globigerinacea; Globorotalia; Globorotalia margarita; Globorotaliidae; Hess Rise; IPOD; Invertebrata; Kyushu-Palau Ridge; Labrador Sea; Leg 105; Leg 107; Leg 108; Leg 13; Leg 31; Leg 32; Leg 47; Leg 68; Leg 72; Leg 73; Leg 90; Leg 94; Lord Howe Rise; Magnetostratigraphy; Mediterranean Sea; Microfossils; Mid-Atlantic Ridge; Neogene; North Atlantic; North Pacific; Northeast Atlantic; Northwest Pacific; ODP Site 646; ODP Site 652; ODP Site 654; ODP Site 657; ODP Site 658; ODP Site 659; ODP Site 660; ODP Site 661; ODP Site 662; ODP Site 664; ODP Site 667; Ocean Drilling Program; Pacific Ocean; Paleomagnetism; Philippine Sea; Planktonic taxa; Pliocene; Protista; Range; Rio Grande Rise; Rockall Trough; Rotaliina; Sierra Leone Rise; South Atlantic; South Pacific; Southwest Pacific; Tertiary; Tyrrhenian Basin; Tyrrhenian Sea; West Mediterranean; West Pacific
Coordinates: S453129 S211153 E1745653 E1611336
N371724 N534600 W0180000 W0351154
S012325 N211954 W0114421 W0231630
N401500 N403500 E0120900 E0104100
Record ID: 2015015478
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom