The Hectoroceras kochi Zone (Ryazanian) in the North Sea Central Graben and remarks on the Late Cimmerian Unconformity

Tove Birkelund, Claus Koch Clausen, Henrik Nøhr Hansen, Lise Holm

    Publikation: Bidrag til bog/rapport/konferenceproceedingsBogkapitelForskning

    Resumé

    Ammonites, inoceramids and dinofl agellate cysts found in core material from the E-1 well in the Tail End Graben of the Danish part of the Central Graben are described. The core be longs to the upper, highly radioactive part of the Kimmeridge Clay Formation (unit J-4) and includes the ammonite Hecroroceras
    kochi
    indicating the basal Cretaceous, Lower Ryazani an H. kochi Zone. Dinoflagellates indicate the Cannosphaeropsis thula Subzone. Dinoflagellates from cuttings immediately below and above the boundary between the Kimmeridge Clay Formation and the overlying Valhall Formation indicate a Valanginian age for the boundary (Spiniferites ramosus Zone). No hiatus between the two formations is discernible in the din oflagellates. The "Late Cimmeri an unconformity" is discussed in the light of the new stratigraphic data from the well.
    OriginalsprogEngelsk
    TitelDGU Årbog 1982
    RedaktørerBent Aaby
    ForlagDGU
    Sider53-72
    Antal sider20
    ISBN (Trykt)87-421-0735-0
    DOI
    StatusUdgivet - 30 nov. 1983

    Publikationsserier

    NavnDGU Årbog
    Vol/bind1982
    ISSN0105-063X

    Emneord

    • Denmark

    Programområde

    • Programområde 3: Energiressourcer

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