Themes and localities
About GeoSites
Status and information

Sydfynske Øhav

Theme: Holocene coastal development  

Locality: Archipelago south of Funen
Description of a Danish GeoSite

Primary identification

1. GeoSite no.:
GS - 5-2.

2. National locality no.:
NGI - 128.

3. GeoSite name:
Sydfynske Øhav.

4. Location:
Denmark; South of Funen.

5. Co-ordinates UTM:
System ED50 Zone 32, x=577312, y=6092099.

6. Type of locality:

Primary geological features

7. Main topic:
Erosional and depositional coastal forms.

8. Geo(morpho)logy:
Transgressed Weichselian glacial landscape, the tilly culmination points of which are now the cores of islands, the different exposures of which are actively swept by winds and waves. This, together with the variable sediment budget, produces ever changing coastal cliffs and islets with littoral meadows, associated beach ridges and reefs, barrier beaches, spits (straight as well as curved), tombolos, foreland ridges at right angle to the coast, and coves.
There are flooded forests (stumps) and submarine remains of human settlements the Stone Age (Maglemose culture) at 2 - 3 metres depth. From here precise dendrochronological datings and historic environmental evaluations have been achieved.

9. Frame / context:
Geomorphology and Sedimentology.

10. Chronostratigraphy:
Late Pleistocene to Holocene.

11. Primary value:
Transgressed glacial landscape.

12. Comparative evaluation:
The shallow sea South of Funen is one amongst more transgressed archipelagoes within Denmark. Other archipelagoes are located North of Funen, South of Zealand, and West of Southern Jutland (Watten Sea). The archipelago South of Funen has the greatest variability in erosional and accumulational formes in an area, which is hardly affected by tides, and indeed the greatest number of islands.

Supplementary locality: The ajoining area in Storebælt.

13. Comparable GeoSites:
In Denmark: Other archipelagoes are located West of Southern Jutland (Watten Sea, GS - 5-3). Similar areas exist North of Funen, and South of Zealand.

Supplementary data in support of the locality

14. Delineation on a map:

15. Higth of the GeoSite:

16. Area of the GeoSite:
~500 km2.

17. Subordinate geological interests:
Climatic evolution.

18. "Non"-geo interests:
Raw materials, Archeological sites, Biological studies, and cultural history, which are all in an interplay with geological processes and landscapes.

19. References:
Crumlin-Pedersen, O., Porsmose, E. og Thrane, H., 1996: Atlas over Fyns kyst i Jernalder, Vikingetid og Middelalder. Odense Universitetsforlag.
Larsen, G. og GeologiskNyt, 1997: Øhavets Geologi. Fyns Amt.
Larsen, G., 2002: Fyn og Øerne, Geologisk set, En beskrivelse af Nationale Geologiske Interesseområder. Fyns Amt, Geografforlaget og Skov- og Naturstyrelsen, p 78-83.
Milthers, K., 1959: Kortbladet Fåborg, Svendborg og Gulstav. Danmarks Geologiske Undersøgelse, 1. Rk., Nr. 21a.
Milthers, V., 1940: Kortbladet Vissenbjerg. Danmarks Geologiske Undersøgelse, 1. Rk., Nr. 19.
Pedersen, K.S., 1985: Det sydfynske arkipelag. Dets geologiske udvikling med særlig hensyntagen til havniveauændringer og den marine molluskfauna. I: Skaarup, J. (Red.): Yngre stenalder på øerne syd for Fyn. Langelands Museum.

20. Data sources, collections:

21. Illustrations:

22. Proposers:
Dansk Geologisk Forening & Det Kongelige Danske Geografiske Selskab.

23. Description by:
Based on the original proposal and Larsen, G. 2002 (see the references).

24. Recommandation:
Sydfynske Øhav is a GeoSite.


26. Supplementary description:

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Last modified : Onsdag 20. Dec., 2006
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