Research paper
The thyra Ø flora: Toward an understanding of the climate and vegetation during the early tertiary in the high arctic

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Abstract

The Late Paleocene-Early Eocene Thyra Ø flora from eastern North Greenland is represented by a collection of 30–31 fossil plant types of which 22–23 are angiosperm leaf types. The flora records warm temperate climatic conditions with the absence of frost and is based mostly on comparison of the nearest living relatives to genera in the Thyra Ø flora. Climatic conditions implied by this method is in contrast to the cool temperate conditions indicated by this method is in contrast to the cool temperate conditions indicated by leaf physiognomy. Unpublished Early Tertiary leaf collections from Spitsbergen also record cool temperate conditions based on leaf margin data even though many taxa representing warmer climatic conditions are present. It is suggested here that the response to the low Arctic light levels was a main factor in shaping the character of the Early Tertiary Arctic vegetation, including leaf physiognomy and species composition. This has implications toward the use of leaf physiognomy for determining past climates in the Arctic.

References (82)

  • B. Bartholomew et al.

    Metasequoia glyptostroboides — its present status in central China

    J. Arnold Arbor. Harv. Univ.

    (1983)
  • J.F. Basinger

    Seed cones of Metasequoia milleri from the Middle Eocene of southern British Columbia

    Can. J. Bot.

    (1984)
  • J.F. Basinger

    Our “tropical”

    Arctic. Can. Geogr.

    (1986)
  • E.W. Berry

    The past climate of the North Polar region

    Smithson. Misc. Collect.

    (1930)
  • Boyd, A., Stemmerik, L. and Håkansson, E., in prep. Early Tertiary plant fossils from the Thyra Ø Formation, Wandel Sea...
  • B. Buchardt

    Oxygen isotope paleotemperatures from the Tertiary period in the North Sea area

    Nature

    (1978)
  • B.F. Chabot et al.

    The ecology of leaf life spans

    Annu. Rev. Ecol. Syst.

    (1982)
  • A. Chandrasekharam

    Megafossil flora from the Genesee locality, Alberta, Canada

    Palaeontographica B

    (1974)
  • R.W. Chaney

    The succession and distribution of Cenozoic floras around the Pacific Northern Basin

  • R.W. Chaney

    Pliocene floras of California and Oregon

    Carnegie Inst. Washington Publ.

    (1944)
  • K.L. Chu et al.

    An ecological reconnaissance in the native home of Metasequoia glyptostroboides

    Ecology

    (1950)
  • D.L. Clark

    Late Mesozoic and early Cenozoic sediment cores from the Arctic Ocean

    Geology

    (1974)
  • G.T. Creber et al.

    Tree growth in the Mesozoic and Early Tertiary and the reconstruction of paleoclimates

    Palaeogeogr. Palaeoclimatol. Palaeoecol.

    (1985)
  • R.M.T. Dahlgren et al.

    The families of the Monocotyledens: Structure, Evolution, and Taxonomy

  • M.B. Davies

    Pleistocene biogeography of temperate deciduous forests

    Geosci. Man

    (1976)
  • P.R. Dawes

    Precambrian to Tertiary of northern Greenland

  • P.R. Dawes et al.

    The case against major displacement along the Nares Strait

  • G.E. Dolph

    Variation in leaf size and margin type with respect to climate

    Cour. Forsch.-Inst. Senckenberg

    (1978)
  • G.E. Dolph et al.

    Foliar physiognomy as an aid in determining paleoclimate

    Palaentographica B

    (1979)
  • Eldholm, O., Skogseid, J., Sundvor, E., Myhre, A.M.,in press,Grantz, A., Johnson, L., Sweeney, J.F., The...
  • R. Florin

    The distribution of conifer and taxad genera in time and space

    Acta Horti Bergiana

    (1963)
  • T. Givnish

    On the adaptive significance of leaf form

  • H.R. Goeppert

    Die Tertiärflora auf der Insel Java

    Akad. Wet.

    (1854)
  • G.C. Green et al.

    Growth of the banana plant in relation to winter air temperature fluctuations

    Agroplantae

    (1969)
  • N. Hald et al.

    Lithostratigraphy of the Early Tertiary volcanic rocks of central West Greenland

    Grønl. Geol. Unders. Rapp.

    (1975)
  • T.M. Harris

    Two neglected aspects of fossil conifers

    Am. J. Bot.

    (1975)
  • O. Heer

    Miocene Flora von Nordgrönland

    Flora Fossilis Arct.

    (1868)
  • O. Heer

    Die miocene Flora und Fauna Spitzbergens

    K. Sven. Vet. Akad. Handl.

    (1870)
  • O. Heer

    Beitrage zur fossilen Flora Spitzbergens

    K. Sven. Vet. Akad. Handl.

    (1876)
  • O. Heer

    Die Tertiäre Flora von Grönland: Die fossile Flora Gronlands

    Flora Fossilis Arct.

    (1883)
  • L.J. Hickey

    Stratigraphy and paleobotany of the Golden Valley Formation (early Tertiary) of western North Dakota

    Geol. Soc. Am. Mem.

    (1977)
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