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TitleCretaceous and Cenozoic dinoflagellate cysts and other palynomorphs from the western and eastern margins of the Labrador-Baffin Seaway
AuthorFensome, R A; Nohr-Hansen, H; William, G L
SourceGeological Survey of Denmark and Greenland Bulletin 36, 1, 2016 p. 1-143
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20150412
ProvinceNewfoundland and Labrador; Offshore region; Nunavut
AreaBaffin Seaway
Lat/Long WENS -80.0000 -40.0000 80.0000 60.0000
Subjectsmarine geology; paleontology; palynological analyses; palynological analysis; palynology; palynomorphs; palynostratigraphy; biostratigraphy; transgressions; marine sediments; paleoenvironment; sea floor spreading
Illustrationslocation maps; geological sketch maps; cross-sections; cross-sections, stratigraphic; schematic diagrams; geological time charts; tables
ProgramBaffin Petroleum Systems, GEM2: Geo-mapping for Energy and Minerals
AbstractNew palynological analyses of material from 11 offshore wells on the Canadian Margin and six on the West Greenland Margin has led to a new event-biostratigraphic framework for Cretaceous'Cenozoic strata of the Labrador Sea-Davis Strait-Baffin Bay (Labrador-Baffin Seaway) region. This framework is based on about xx dinoflagellate cyst taxa and smaller numbers of acritarch, algal and fungal and plant microfossils, almost all miospores. In the systematics we include two new genera of dinocysts (Scalenodinium and Taurodinium), 15 new species of dinocysts (Chiropteridium gilbertii, Chytroeisphaeridia hadra, Cleistosphaeridium elegantulum, Cleistosphaeridium palmatum, Dapsilidinium pseudoinsertum, Deflandrea borealis, Evittosphaerula? foraminosa, Ginginodinium? flexidentatum, Hystrichosphaeridium quadratum, Hystrichostrogylon digitus, Impletosphaeridium apodastum, Surculosphaeridium convocatum, Talladinium pellis, Taurodinium granulatum and Trithyrodinium conservatum), three emendations of dinocyst genera (Chiropteridium, Isabelidinium and Surculosphaeridium), five new combinations for dinocyst species (Alterbidinium biaperturum, Deflandrea majae, Kleithriasphaeridium mantellii, Sepispinula? insolita and Spongodinium grossum), one new species of acritarchs (Fromea quadrangularis), one new species of miospores (Baculatisporites crenulatus) and one new combination for miospores (Tiliaepollenites crassipites). Most of the taxa included provide age information, almost exclusively last appearance datums ('tops' or extinction events), but some are useful mainly for environmental interpretations. Collectively, they provide a powerful tool for helping to establish the geological history of the Labrador-Baffin Seaway.
Summary(Plain Language Summary, not published)
Using fossils to determine ages of strata and past environments requires an understanding of how to identify species and a communication of species concepts; in other words taxonomy. Without an effective taxonomic understanding of fossil assemblages, applied interpretations are devalued and may be misleading. This paper deals with the taxonomy of fossils dinoflagellate cysts, spores and pollen used in our companion paper on the stratigraphy, sedimentary basin evolution, and petroleum systems of Cretaceous-Tertiary rocks in the Labrador-Baffin Seaway. It includes several species that are new to science but potentially useful in correlating strata in the GEM Baffin region and across the Arctic.