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

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 b...

Full description

Bibliographic Details
Published in:Geological Survey of Denmark and Greenland Bulletin
Main Authors: Alsen, Peter, Piasecki, Stefan
Format: Article in Journal/Newspaper
Language:English
Published: Geological Survey of Denmark and Greenland (GEUS) 2018
Subjects:
Jameson Land Basin
East Greenland
ammonites
dinoflagellate cysts
biostratigraphy
chronostratigraphy
Oxfordian
Kimmeridgian
Volgian
Greenland
Jameson Land
Hareelv
Online Access:https://geusbulletin.org/index.php/geusb/article/view/4308
https://doi.org/10.34194/geusb.v42.4308
Description
Summary: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.

Similar Items