A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin

Ulrik Gregersen; Olaf Michelsen

doi:10.34194/seriec.v12.7114

A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin

Ulrik Gregersen
, Olaf Michelsen

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › peer-review

Abstract

Six sequences are identified in the Upper Jurassic and lowermost Cretaceous Flyvbjerg-, Børglum- and Frederikshavn Formations of the Danish Subbasin. Sequence boundaries and maximum flooding surfaces are interpreted on the basis of log analysis, biostratigraphy and lithology of core samples. Parasequences and parasequence sets are mainly recognized in shallow marine sediments. The gamma ray and SP logs of the sequences have an overall cyclic character, indicating the presence of upward fining deposits overlain by upward coarsening deposits. A blocky log pattern or an upward decreasing trend lowermost in the sequence represents sanddominated sediments, and it is interpreted as lowstand deposits caused by forced regression. The overlying interval with upward fining deposits comprise transgressive deposits. The interval between maximum flooding surface and the upper sequence boundary has an upward coarsening trend, and it probably includes the highstand deposits.

Original language	English
Title of host publication	Proceedings of the 2nd Symposium on Marine Geology
Subtitle of host publication	Geology of the North Sea and Skagerrak, Aarhus University, 1993
Editors	Olaf Michelsen
Publisher	Danmarks Geologiske Undersøgelse
Pages	125-136
Number of pages	11
DOIs	https://doi.org/10.34194/seriec.v12.7114
Publication status	Published - 1995
Externally published	Yes
Event	2nd Symposium on Marine Geology: Geology of the North Sea and Skagerrak - Aarhus Universitet, Aarhus, Denmark Duration: 7 Oct 1993 → 8 Oct 1993 Conference number: 2

Publication series

Series	Danmarks Geologiske Undersøgelse, Serie C
Volume	12

Other

Other	2nd Symposium on Marine Geology
Country/Territory	Denmark
City	Aarhus
Period	7/10/93 → 8/10/93

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 14 Life Below Water

Programme Area

Programme Area 3: Energy Resources

Access to Document

10.34194/seriec.v12.7114Licence: CC BY

Cite this

Gregersen, Ulrik ; Michelsen, Olaf. / A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin. Proceedings of the 2nd Symposium on Marine Geology: Geology of the North Sea and Skagerrak, Aarhus University, 1993. editor / Olaf Michelsen. Danmarks Geologiske Undersøgelse, 1995. pp. 125-136 (Danmarks Geologiske Undersøgelse, Serie C, Vol. 12).

@inproceedings{7eec3851e81c43729540a6330505f7cf,

title = "A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin",

abstract = "Six sequences are identified in the Upper Jurassic and lowermost Cretaceous Flyvbjerg-, B{\o}rglum- and Frederikshavn Formations of the Danish Subbasin. Sequence boundaries and maximum flooding surfaces are interpreted on the basis of log analysis, biostratigraphy and lithology of core samples. Parasequences and parasequence sets are mainly recognized in shallow marine sediments. The gamma ray and SP logs of the sequences have an overall cyclic character, indicating the presence of upward fining deposits overlain by upward coarsening deposits. A blocky log pattern or an upward decreasing trend lowermost in the sequence represents sanddominated sediments, and it is interpreted as lowstand deposits caused by forced regression. The overlying interval with upward fining deposits comprise transgressive deposits. The interval between maximum flooding surface and the upper sequence boundary has an upward coarsening trend, and it probably includes the highstand deposits.",

author = "Ulrik Gregersen and Olaf Michelsen",

note = "Gregersen, U., \& Michelsen, O. (1995). A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin. Danmarks Geologiske Unders{\o}gelse Serie C, 12, 125–136. https://doi.org/10.34194/seriec.v12.7114; 2nd Symposium on Marine Geology : Geology of the North Sea and Skagerrak ; Conference date: 07-10-1993 Through 08-10-1993",

year = "1995",

doi = "10.34194/seriec.v12.7114",

language = "English",

series = "Danmarks Geologiske Unders{\o}gelse, Serie C",

publisher = "Danmarks Geologiske Unders{\o}gelse",

pages = "125--136",

editor = "Olaf Michelsen",

booktitle = "Proceedings of the 2nd Symposium on Marine Geology",

}

Gregersen, U & Michelsen, O 1995, A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin. in O Michelsen (ed.), Proceedings of the 2nd Symposium on Marine Geology: Geology of the North Sea and Skagerrak, Aarhus University, 1993. Danmarks Geologiske Undersøgelse, Danmarks Geologiske Undersøgelse, Serie C, vol. 12, pp. 125-136, 2nd Symposium on Marine Geology, Aarhus, Denmark, 7/10/93. https://doi.org/10.34194/seriec.v12.7114

A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin. / Gregersen, Ulrik; Michelsen, Olaf.
Proceedings of the 2nd Symposium on Marine Geology: Geology of the North Sea and Skagerrak, Aarhus University, 1993. ed. / Olaf Michelsen. Danmarks Geologiske Undersøgelse, 1995. p. 125-136 (Danmarks Geologiske Undersøgelse, Serie C, Vol. 12).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › peer-review

TY - GEN

T1 - A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin

AU - Gregersen, Ulrik

AU - Michelsen, Olaf

N1 - Conference code: 2

PY - 1995

Y1 - 1995

N2 - Six sequences are identified in the Upper Jurassic and lowermost Cretaceous Flyvbjerg-, Børglum- and Frederikshavn Formations of the Danish Subbasin. Sequence boundaries and maximum flooding surfaces are interpreted on the basis of log analysis, biostratigraphy and lithology of core samples. Parasequences and parasequence sets are mainly recognized in shallow marine sediments. The gamma ray and SP logs of the sequences have an overall cyclic character, indicating the presence of upward fining deposits overlain by upward coarsening deposits. A blocky log pattern or an upward decreasing trend lowermost in the sequence represents sanddominated sediments, and it is interpreted as lowstand deposits caused by forced regression. The overlying interval with upward fining deposits comprise transgressive deposits. The interval between maximum flooding surface and the upper sequence boundary has an upward coarsening trend, and it probably includes the highstand deposits.

AB - Six sequences are identified in the Upper Jurassic and lowermost Cretaceous Flyvbjerg-, Børglum- and Frederikshavn Formations of the Danish Subbasin. Sequence boundaries and maximum flooding surfaces are interpreted on the basis of log analysis, biostratigraphy and lithology of core samples. Parasequences and parasequence sets are mainly recognized in shallow marine sediments. The gamma ray and SP logs of the sequences have an overall cyclic character, indicating the presence of upward fining deposits overlain by upward coarsening deposits. A blocky log pattern or an upward decreasing trend lowermost in the sequence represents sanddominated sediments, and it is interpreted as lowstand deposits caused by forced regression. The overlying interval with upward fining deposits comprise transgressive deposits. The interval between maximum flooding surface and the upper sequence boundary has an upward coarsening trend, and it probably includes the highstand deposits.

U2 - 10.34194/seriec.v12.7114

DO - 10.34194/seriec.v12.7114

M3 - Conference article in proceedings

T3 - Danmarks Geologiske Undersøgelse, Serie C

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BT - Proceedings of the 2nd Symposium on Marine Geology

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Gregersen U, Michelsen O. A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin. In Michelsen O, editor, Proceedings of the 2nd Symposium on Marine Geology: Geology of the North Sea and Skagerrak, Aarhus University, 1993. Danmarks Geologiske Undersøgelse. 1995. p. 125-136. (Danmarks Geologiske Undersøgelse, Serie C, Vol. 12). doi: 10.34194/seriec.v12.7114

A stratigraphic interpretation of the Oxfordian-Valaginian deposits in the Danish Subbasin

Abstract

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