Vol. 42 | 2018

Biostratigraphy of the Hareelv Formation (Upper Jurassic) in the Blokelv-1 core, Jameson Land, central East Greenland

RESEARCH ARTICLE
Published December 28, 2018
Peter Alsen
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Stefan Piasecki
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RESEARCH ARTICLE
Published December 28, 2018
Photos of fossils in black and white
Abstract
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Keywords

Jameson Land Basin, East Greenland, ammonites, dinoflagellate cysts, biostratigraphy, chronostratigraphy, Oxfordian, Kimmeridgian, Volgian

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Copyright (c) 2018 Peter Alsen, Stefan Piasecki

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

GEUS Bulletin is an open-access, peer-reviewed journal published by the Geological Survey of Denmark and Greenland (GEUS). This article is distributed under a CC-BY 4.0 licence, permitting free redistribution and reproduction for any purpose, even commercial, provided proper citation of the original work. Author(s) retain copyright over the article contents. Read the full open access policy.

Abstract

The Hareelv Formation in the Blokelv-1 core is biostratigraphically subdivided by means of ammonite and dinoflagellate cyst stratigraphy. The succession ranges from the Oxfordian C. densiplicatum Chronozone to the Volgian P. elegans Chronozone. The mudstones of the Blokelv-1 core are characterised by large amounts of amorphous organic matter. This hampers the preparation and identification of dinoflagellate cysts, which are also commonly degraded and corroded. Ammonites, on the other hand, are common and well-preserved in the core, contrasting with that observed in the equivalent facies and stratigraphic interval at outcrop. Integration of the ammonite and dinoflagellate cyst biostratigraphical data yields a robust chronostratigraphic subdivision of the middle Oxfordian – lowermost Volgian cored section.

Keywords

Jameson Land Basin, East Greenland, ammonites, dinoflagellate cysts, biostratigraphy, chronostratigraphy, Oxfordian, Kimmeridgian, Volgian

License

Copyright (c) 2018 Peter Alsen, Stefan Piasecki

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

GEUS Bulletin is an open-access, peer-reviewed journal published by the Geological Survey of Denmark and Greenland (GEUS). This article is distributed under a CC-BY 4.0 licence, permitting free redistribution and reproduction for any purpose, even commercial, provided proper citation of the original work. Author(s) retain copyright over the article contents. Read the full open access policy.

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Editors: Jon R. Ineson and Jørgen A. Bojesen-Koefoed

The exposed Jurassic succession in East and North-East Greenland has long been presented as an analogue for equivalent deeply buried strata on the Norwegian conjugate shelf and offshore North-East Greenland. In particular, the Upper Jurassic marine mudstone succession is often ascribed source-rock potential as [...]