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Bovbjerg Klint

Theme: Glacially dislocated cliffs  

Locality: Bovbjerg Klint
Description of a supplementary Danish GeoSite

Primary identification

1. GeoSite no.:
GS – 4-4.

2. National locality no.:
NGI 76.

3. Geosite name:
Bovbjerg klint.

4. Location:
Denmark; North-Western Jutland.

5. Co-ordinates UTM:
System ED50, Zone 32, x=445846, y=6263370.

6. Type of locality:
Coastal cliff.

Primary geological features

7. Main topic:
Stratigraphic succession in deposits at the main stationary line of the Weichseian NW-glacier.

8. Geo(morpho)logy:
Elster, Saale and Weichsel Deposits, glacial thrusts.
The cliff exposure (of post glacial origin) illustrates a succession of glacial deposits dating from Elster to post Weichsel, located at the main stationary glacial front position of the NW-glacier during the Weichselian. In the south layered clay of Late Elster age is overlain by a dark till with prominent white limestone inclusions (Saale till). This till was deposited by a glacier coming from SE (probalby during the Hinnerup Stage). Further northward approaching the middle section of the cliff the Saale till constitutes the base of the cliff, whereas in the middle section itself the till is thrusted and folded into steeply dipping interlayers with coarsening upwards meltwater deposits and till of Weischelian age. The northern part of the profile and the upper part over the thrusted section consists of till stemming from the Weichelian NW-glacier, which also caused the thrusting. Locally the top of the exposed section exhibits post glacial lake deposits and aeolian sand.

9. Frame / context:
Stratigraphy, Sedimentology, Climatology, Tectonics.

10. Chronostratigraphy:
Pleistocene (Quaternary).

11. Primary value:
Exposed cross section in main Weichselian stationary line.

12. Comparative evaluation:
The site exhibits the only cross section through the main stationary line during the Weichselian glaciation. The morphology is characteristic of the low degree of topographic variation across this elongate feature. Other tectonised and thrusted, as well as undisturbed, successions through Quaternary deposits are known from many localities (e.g. Odsherredsbuerne og Ristinge Klint). Often, however, prequaternary beds have been included in the deformation.

13. Comparable GeoSites:
In Denmark: None

Supplementary data in support of the locality

14. Delineation on a map:

15. Higth of the GeoSite:
Up to 35 m (from sea level).

16. Area of the GeoSite:
~6km x ~0,05km, ~0,3km2, The coast from Fjerring strand to Fjaltring.

17. Subordinate geological interests:
Hindland geomorphology.

18. "Non"-geo interests:
Holiday resort.

19. References:
Hansen, S., 1948: Landskabets geologiske Udformning. I: Mathiassen, T.: Studier over Vestjyllands Oldtidsbebyggelse. Nationalmuseets Skrifter. Ark�ologisk-Historisk R�kke, II, s14-24.
Houmark-Nielsen, M., 2003: Signature and timing of the Kattegat Ice Stream: onset of the LGM-sequence at the south western margin of the Scandinavian Ice Sheet. Boreas, Vol. 32, p227-241.
Larsen, G. and Kronborg, C., 1994; In Andersen, S. (Ed.): Geologisk set, Det mellemste Jylland, Geografforlaget, Brenderup, s209-215.
N�rregaard, E.M., 1912: Bovbjerg-Profilet. - Medd. dansk geol. Foren. 4, s47-54.
Nn�rvang, A., 1943: Profiler gennem Flydejord i Jylland. - Medd. dansk geol. Foren. 10, s307-323.
Pedersen, S.A.S., Petersen, K.S. og Rasmussen, L.A., 1988: Observations on glaciodynamic structures in the Main Stationary Line in western Jutland, Denmark. In: Croot, D.G. (Ed.): Glaciotectonics. Forms and processes, p177-183.
Ussing, N.V., 1903: Om Jyllands Hedesletter og Teorierne for deres Dannelse. -. Kgl. danske Vidensk. Selsk. Forhandlinger, 2, s1-53.
Ussing, N.V., 1907: Om Foddale og Randmor�ner i Jylland. - Kgl. danske Vidensk. Selsk. Forhandlinger, 4, s161-213.

20. Data sources, collections:
Field descriptions by S. Andersen, 1993.

21. Illustrations:

22. Proposers:
The Royal Danish Geographical Society / Claus Heilmann-Clausen & Ole Bj�rslev Nielsen.

23. Description by:
Based on Larsen, G. and Kronborg, C., 1994; In Andersen, S. (Ed.): Geologisk set, Det mellemste Jylland, Geografforlaget, Brenderup, p 258-261.

24. Recommandation: Supplementary GeoSite.


26. Supplementary description:
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List of localities
Anholt og �sterrevBoerupFroeslev PlantageGram LergravHanklitKalks�jler ved HirsholmeneKarlby klintKongens Mose Lille VildmoseL�nstrupSilstrup, Northern, Mors and Erteb�lle HovedSkagens OddeStensbaek PlantageUrh�je og Myrh�je PlantagerVadehavetFur (Stolleklint and Knudeklint)

Theme: Glacially dislocated coastal cliffs
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Last modified : Sunday 07. Jan. 2007 Erik Nygaard
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