DEPARTMENT OF GROUNDWATER AND QUATERNARY GEOLOGY MAPPING
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Geological mapping of Denmark |
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People
Stig Schack Pedersen, manager of mapping -
sasp@geus.dk
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Gravel pit at Birket, northern part of Lolland, southern Denmark.
The mapping concept follows the ideas of glaciodynamic stratigraphy (Pedersen 1993), which links the understanding of outwash deposits (lower part of the picture) to deposition of tills (upper part of the picture. |
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What we do!
Geological mapping of Denmark
GEUS is responsible for the geological mapping of the land surface in Denmark. Currently the mapping activity is carried out in several regions in Denmark. The mapping has been organised so that it comprehensively accommodates the need for geological maps for current community tasks. Thus the mapping focuses on areas with special raw material interest and areas with special drinking water relevance.
In Denmark 82 % of the land surface is covered by geological mapping. The systematically mapping is carried out by geologist passing the landscape on foot using a hand auger to make testing of the soil composition in one metres depth for each 100 m. The mapping is carried out on maps in scale 1:25.000. One geologist is able to map about 2 square kilometre a day. With the steady state activity it is foreseen that the mapping will be concluded in year 2015.
The products produced form the systematically mapping are three types of geological maps:
- preliminary map of the Quaternary sediments in scale 1:25,000.
- geological maps of map sheets in scale 1:50,000 with legend, description and profiles.
- Index map of the geology of Denmark in scale 1:200,000.
The maps are now prepared for digital products that can be distributed via computers. In the near future it will be possible to order a geological map of any individual square covered by the geological mapping via the GIS product managed by the department of Geological Data Centre
The geological map in scale 1:50.000 is the basic product which should always be accomplished with the geological description in the form of a text book.
SW-facing cliff at Fejø, Smålandsfarvandet, southern Denmark.
As part of the systematical mapping all accessible profiles are investigated.
The cliff section in the picture display the top of a fault block of Cretaceous chalk
superposed by a glacitectonite and and overlain till deposited in the late Weichselian.
References:
Pedersen, S.A.S. 1993: Galciodynamic Event and Glaciodynamic Sequence. In Aber, J. (ed.): Glaciotectonics and Mapping of Glacial Deposits. Proceedings of the INQUA Commission on Formation and Properties of Glacial Deposits. Canadian Plains Research Center, University of Regina, 67-85.
Pedersen, S.A.S. & Petersen, K.S. 1997: Djurslands Geologi. Danmarks og Grønlands Geologiske Undersøgelse, 96 pp. + includ. geol. map.
Maps:
Pedersen, S.A.S. & Petersen, K.S. 1995: Geologisk kort over Djursland 1:50.000. Danmarks Geologiske Undersøgelse kortserie nr. 51.
Pedersen, S.A.S. 1998: Israndslinier i Norden 1:3.000.000. Nordisk Ministerråd.
Pedersen, S.A.S. & Rasmussen, L.Aa. 2000: Geological map of Denmark, 1:50 000, Sakskøbing. Copenhagen: Geological Survey of Denmark and Greenland.
Pedersen, S.A.S. & Petersen, K.S. 2002: Geological map of Denmark, 1:50 000, Hanstholm. Copenhagen: Geological Survey of Denmark and Greenland.
See also:
Palaeo-icestream directions
A boulder with a well developed glacial striation is here seen
at the north coast of Lolland, southern Denmark.
Large part of Denmark is covered by till in which erratic from
the Scandinavian basement is embedded.
Erosion of the Quaternary succession along the coast is responsible
for the accumulation of stones and boulders along the shore.
Authorship
Stig Schack Pedersen -
sasp@geus.dk
Feel free to send e-mail for more information.
Edited by:
Niels E. Poulsen, GEUS -
nep@geus.dk
