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The South Swedish Dome: a key structure for identification of peneplains and conclusions on Phanerozoic tectonics of an ancient shield
Stockholms universitet.
Göteborgs universitet.
Mittuniversitetet, Fakulteten för humanvetenskap, Avdelningen för turismvetenskap och geografi. Geovisiona AB, Järfälla.ORCID-id: 0000-0003-0547-0565
2017 (Engelska)Ingår i: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 139, nr 4, s. 244-259Artikel i tidskrift (Refereegranskat) 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 Småland 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.

Ort, förlag, år, upplaga, sidor
2017. Vol. 139, nr 4, s. 244-259
Nyckelord [en]
Denudation surface, peneplain, relief differentiation, saprolite, remnants of cover rocks, uplift, tectonics
Nationell ämneskategori
Övrig annan samhällsvetenskap Kulturgeografi
Identifikatorer
URN: urn:nbn:se:miun:diva-31508DOI: 10.1080/11035897.2017.1364293ISI: 000416892400002Scopus ID: 2-s2.0-85028526907OAI: oai:DiVA.org:miun-31508DiVA, id: diva2:1137501
Tillgänglig från: 2017-08-31 Skapad: 2017-08-31 Senast uppdaterad: 2018-02-22Bibliografiskt granskad

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Bonow, Johan M.

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