Skip to main content

Research Repository

Advanced Search

Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust

Westaway, R.; Bridgland, D.R.

Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust Thumbnail


Authors

R. Westaway



Abstract

Reversals in vertical crustal motion, alternations between uplift and subsidence over time scales of hundreds of thousands of years or more, have been identified in Late Cenozoic fluvial sequences in many regions worldwide. They form a class of fluvial archive that is distinct from the extreme stability observed in Archaean cratons and the monotonic uplift or subsidence that is widely observed in other regions. Such alternations between uplift and subsidence are characteristic of regions of Early or Middle Proterozoic crust, where the initial crustal consolidation included the development of a thick ‘root’ of mafic material at the base of the crust; the present study focuses on localities with this crustal type in the USA and eastern Europe. It has previously been suggested on the basis of uplift modelling that this style of crustal behaviour occurs only in regions where the mobile lower-crustal layer is relatively thin. This study supports this conclusion on the basis of independent geothermal calculations, which indicate that such alternations between uplift and subsidence occur where the mobile lower-crustal layer is ≤∼7 km thick. An understanding of this phenomenon, in relation to the understanding of vertical crustal motions induced by surface processes (and thus by climate change) in general, therefore requires analysis of the properties and dynamics of the mobile lower-crustal layer; detailed analysis of fluvial sequences thus contributes unique information in this area.

Citation

Westaway, R., & Bridgland, D. (2014). Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust. Boreas: An International Journal of Quaternary Research, 43(2), 505-527. https://doi.org/10.1111/bor.12051

Journal Article Type Article
Acceptance Date Oct 17, 2013
Online Publication Date Jan 2, 2014
Publication Date Apr 1, 2014
Deposit Date Oct 9, 2014
Publicly Available Date Mar 17, 2016
Journal Boreas
Print ISSN 0300-9483
Electronic ISSN 1502-3885
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 43
Issue 2
Pages 505-527
DOI https://doi.org/10.1111/bor.12051

Files

Accepted Journal Article (3 Mb)
PDF

Copyright Statement
This is the accepted version of the following article: Westaway, R. and Bridgland, D. R. (2014), Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust. Boreas, 43(2): 505-527, which has been published in final form at http://dx.doi.org/10.1111/bor.12051. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.







You might also like



Downloadable Citations