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

    Abstrakt

    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 stratigraph ic data from the well.
    OriginalsprogEngelsk
    TitelÅrbog 1982
    RedaktørerBent Aaby
    ForlagDanmarks Geologiske Undersøgelse
    Sider53-72
    Antal sider20
    ISBN (Trykt)87-421-0735-0
    StatusUdgivet - 30 nov. 1983

    Publikationsserier

    NavnDanmarks Geologiske Undersøgelse Årbog
    ForlagDanmarks Geologiske Undersøgelse
    Vol/bind1982
    ISSN (Trykt)0105-063X

    Programområde

    • Programområde 3: Energiressourcer

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