Please use this identifier to cite or link to this item: https://zone.biblio.laurentian.ca/handle/10219/3163
Title: Sedimentology, stratigraphy, and U-Pb detrital-zircon geochronology of the Meall Dearg Formation, Stoer Group, Torridonian succession, north-western Scotland
Authors: Lebeau, Lorraine Elizabeth
Keywords: mesoproterozoic;Stoer Group;Torridonian;rift basin;palaeoclimate;U-Pb detritalzircon geochronology;Lewisian Gneiss Complex;fluvial-aeolian
Issue Date: 12-Sep-2018
Abstract: The Meall Dearg Formation is a c.1.2 billion year old sandstone, and represents the uppermost unit of the Stoer Group (Torridonian succession, north-western Scotland). Originally described as purely fluvial, the Meall Dearg Formation is here reappraised to represent coeval fluvial-channelised, floodbasin, and aeolian erg environments by facies analysis and petrographic methods. Evidence from palaeoclimate indicators points to humid conditions at time of deposition — inferred from clastic rather than evaporitic floodbasin strata. U-Pb detrital-zircon geochronology resolved provenance from the underlying Lewisian Gneiss Complex (comprising several juxtaposed terranes). Erosion from the Assynt, Gruinard, and Gairloch terranes provided most sediment supply. A statistical comparison of ages from the fluvial and aeolian deposits revealed that both underwent sediment transfer and/or were supplied from comparable terranes. The Meall Dearg Formation, a post-rift fill, is largely comparable to the coeval, pre-Rodinian Gardar-Rift sequence of Greenland.
URI: https://zone.biblio.laurentian.ca/handle/10219/3163
Appears in Collections:Master's Theses
Master's Theses

Files in This Item:
File Description SizeFormat 
Lorraine Lebeau's final thesis September 17th.pdf60.85 MBAdobe PDFThumbnail
View/Open


Items in LU|ZONE|UL are protected by copyright, with all rights reserved, unless otherwise indicated.