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The South Swedish Dome: a key structure for identification of peneplains and conclusions on Phanerozoic tectonics of an ancient shield
Stockholm University, Faculty of Science, Department of Physical Geography.
Number of Authors: 32017 (English)In: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 139, no 4, p. 244-259Article in journal (Refereed) Published
Abstract [en]

The relationships between different denudation surfaces/peneplains formed across crystalline basement rocks give valuable information to the tectonic development of ancient shields. The denudation surfaces can be identified by the aid of their landforms, tilt and remnant weathering mantles in relation to cover rocks. Three types of denudation surfaces are identified across south Sweden (1) a tilted flat plain, (2) a tilted hilly surface with relative relief below 150 m and (3) stepped horizontal plains with residual hills. All three types of denudation surfaces are peneplains, denudation surfaces graded to specific base levels. The re-exposed parts of the inclined flat sub-Cambrian peneplain (SCP) extend as a landscape feature from below cover rocks in the north and east and reaches up on the highest summits of the South Swedish Uplands. The SCP (the exact unconformity) is encountered again below Cambrian covers outside the west coast. Thus south Sweden is a geological dome, the South Swedish Dome (SSD), in relation to the Cambrian cover. The southern and western low flanks of the exposed part of the dome are instead characterized by a hilly peneplain, the inclined sub-Cretaceous denudation surface, with remnants of thick, kaolinitic, clayey saprolites. This sub-Cretaceous peneplain is cut off at a distinct level in the south and west by the almost horizontal South Smaland Peneplain, a never covered, epigene, peneplain. The uplift history of the SSD aids to the understanding on the development of late Tertiary drainage systems of the Baltic Basin by the Eridano River.

Place, publisher, year, edition, pages
2017. Vol. 139, no 4, p. 244-259
Keywords [en]
Denudation surface, peneplain, relief differentiation, saprolite, remnants of cover rocks, uplift, tectonics
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-151047DOI: 10.1080/11035897.2017.1364293ISI: 000416892400002OAI: oai:DiVA.org:su-151047DiVA, id: diva2:1172079
Available from: 2018-01-09 Created: 2018-01-09 Last updated: 2018-01-09Bibliographically approved

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