| Title: |
Lithostratigraphy of the Portfjeld Group (Ediacaran – lowermost Cambrian) of North Greenland |
| Authors: |
Jon R. Ineson, John S. Peel, Sebastian Willman, Elias J. Rugen, Martin Sønderholm, Peter Frykman |
| Source: |
GEUS Bulletin, Vol 57, Pp 1-20 (2024) |
| Publisher Information: |
Geological Survey of Denmark and Greenland, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Geology
LCC:Geophysics. Cosmic physics |
| Subject Terms: |
neoproterozoic, slusen formation, glaciologelv formation, carbonate ramp, karst, Geology, QE1-996.5, Geophysics. Cosmic physics, QC801-809 |
| More Details: |
The Portfjeld Formation, as originally defined, is the lowermost lithostratigraphic unit of the mainly Lower Palaeozoic Franklinian Basin in southern Peary Land, central North Greenland. The unit crops out semi-continuously from Valdemar Glückstadt Land to Nordenskiöld Fjord but is also recognised locally in northern parts of Peary Land and Wulff Land (western North Greenland). Regionally, it provides a key record of the early, pre-break-up history of the basin. The type succession in southern Peary Land has thus been the focus of recent biostratigraphical, sedimentological and geochemical study. This has demonstrated the composite nature of the unit, a lower interval (c. 190 m thick) of carbonate ramp deposits of Neoproterozoic (late Ediacaran) age being overlain at a karstic unconformity by a shallow marine, mixed carbonate–siliciclastic interval (c. 100 m thick) of probable earliest Cambrian age. Lithostratigraphic revision of this succession is presented here. The Portfjeld Formation throughout North Greenland is elevated to the rank of group, and two new formations are defined in this group in southern Peary Land and immediately adjacent areas: the Ediacaran carbonate-dominated unit is referred to the Slusen Formation, the upper mixed siliciclastic–carbonate unit to the Glaciologelv Formation. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2597-2154 |
| Relation: |
https://geusbulletin.org/index.php/geusb/article/view/8375/14548; https://doaj.org/toc/2597-2154 |
| DOI: |
10.34194/geusb.v57.8375 |
| Access URL: |
https://doaj.org/article/49c9fe09185e49e08b31e1814d8b6182 |
| Accession Number: |
edsdoj.49c9fe09185e49e08b31e1814d8b6182 |
| Database: |
Directory of Open Access Journals |
