How to translate text using browser tools
1 September 2007 Optical Dating of Dune Ridges on Rømø, a Barrier Island in the Wadden Sea, Denmark
Anni Tindahl Madsen, Andrew S. Murray, Thorbjørn Joest Andersen
Author Affiliations +

The application of optically stimulated luminescence (OSL) to the dating of recent aeolian sand ridges on Rømø, an island off the southwest coast of Denmark, is tested. These sand ridges began to form approximately 300 years ago, and estimates of the ages are available from historical records. Samples for OSL dating were taken ∼0.5 m below the crests of four different dune ridges; at least five samples were recovered from each ridge to test the internal consistency of the ages. Additional samples were recovered from the low lying areas in the swales and from the scattered dune formations in a broad hummocky area landward of the well-defined ridges. Despite low luminescence signals, we were able to obtain a mean age for the youngest ridge of 17 ± 2 years, consistent with the known age of >28 years. Optical ages of individual samples in our study ranged between 10 ± 3 years and 690 ± 50 years, and all ages were broadly consistent with those expected from historical information. The oldest aeolian surface on Rømø appears to be 370 ± 30 years. This is built on what we interpret as a marine sandbank, whose surface is ∼700 years old. The sand ridges seaward of the hummocky dune field have well-defined building phases separated by inactive periods and the first major ridge formed ∼235 years ago. This study demonstrates that optical dating can be successfully applied to these young aeolian sand deposits, and we conclude that OSL dating is a powerful chronological tool in studies of coastal change.

Anni Tindahl Madsen, Andrew S. Murray, and Thorbjørn Joest Andersen "Optical Dating of Dune Ridges on Rømø, a Barrier Island in the Wadden Sea, Denmark," Journal of Coastal Research 23(5), 1259-1269, (1 September 2007).
Received: 4 March 2005; Accepted: 6 January 2006; Published: 1 September 2007
aeolian sediments
optically stimulated luminescence
Get copyright permission
Back to Top