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TitleUpper Cambrian and Lower Ordovician conodont biostratigraphy and revised lithostratigraphy, Boothia Peninsula, Nunavut
 
AuthorZhang, S
SourceCanadian Journal of Earth Sciences vol. 57, no. 9, 2020 p. 1030-1047, https://doi.org/10.1139/cjes-2020-0006
Image
Year2020
Alt SeriesNatural Resources Canada, Contribution Series 20190339
PublisherNational Research Council of Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf; html
ProvinceNunavut
AreaBoothia Peninsula; Canada
Lat/Long WENS -99.0000 -86.0000 74.6667 69.0000
SubjectsScience and Technology; stratigraphy; Cambrian; Ordovician
Illustrationslocation maps; diagrams; satellite images; photographs
ProgramCanada-Nunavut Geoscience Office, Funding Program
Released2020 08 06
AbstractThe strata exposed along Lord Lindsay River on southern Boothia Peninsula were previously named the Netsilik Formation, and then recognized as the Turner Cliffs Formation; the interpretation about their ages and correlations were largely based on limited data. New detailed field investigation at 23 localities along the section resulted in the discovery of over 640 identifiable conodont specimens, with 33 species representing 16 genera, among which a new species, Rossodus boothiaensis n. sp., is recognized. Five North American standard conodont zone/subzone-equivalent faunas are documented from the section, namely the Hirsutodontus hirsutus Subzone-equivalent, Cordylodus angulatus, Rossodus manitouensis, Acodus deltatus/Oneotodus costatus and Oepikodus communis zones-equivalent faunas. These faunas enable a new understanding of the age and stratigraphic position of the Netsilik/Turner Cliffs Formation on southern Boothia Peninsula. The Netsilik Formation can be correlated to the lower member (except for the lowest part) and upper member of the Turner Cliffs Formation; the previously unmeasured upper part of the section can be associated with the lower Ship Point Formation. Based on the new conodont data, these three units are dated as early Age 10, Late Cambrian to middle Tremadocian, Early Ordovician; late Tremadocian, Early Ordovician; and early Floian, Early Ordovician, respectively. This study fills a gap in Upper Cambrian and Lower Ordovician biostratigraphy on Boothia Peninsula, and links the regional biostratigraphy to that of the Laurentia.
Summary(Plain Language Summary, not published)
New detailed field investigation at 23 localities along the Lord Lindsay River section, Boothia Peninsula, Nunavut, resulted in a discovery of 33 conodont species representing 16 genera among over 640 specimens. A new species, Rossodus boothiaensis, is recognized. Five North American standard conodont zone/subzone-equivalent faunas are identified from the section. These faunas enable a new understanding of the age and stratigraphic position of the Lord Lindsay River section on Boothia Peninsula: 1) the section is formed by the lower and upper members of the Turner Cliffs Formation and the lower Ship Point Formation; 2) these three units are dated as early Age 10 (Late Cambrian)-Smiddle Tremadocian (Early Ordovician), late Tremadocian (Early Ordovician), and early Floian (Early Ordovician), respectively. This study fills a gap in Upper Cambrian and Lower Ordovician biostratigraphy on Boothia Peninsula, and links the regional biostratigraphy to that of the North American continent.
GEOSCAN ID321430

 
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