Physics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.2421h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Dec. 1990, p. 2421-2424.
Physics
1
Earth Crust, Geodynamics, Newtonian Fluids, Orography, Plates (Tectonics), Carpathian Mountains (Europe), Topography
Scientific paper
Pinned oroclines, a type of curved orogen which results from lateral pinning of a growing fold-thrust belt, tend to resemble parabolic Newtonian curvature modified by different degrees of flattening at the flow front. It is proposed that such curves can be generated by Newtonian crustal flow driven by topographic variations. In this model, regional topographic differences create a regional flow which produces a parabolic flow front on interaction with lateral bounding obstacles. Local topographic variations modify the parabolic curves and yield more flat-crested, non-Newtonian-type curvatures. A finite-difference thin-skin tectonic simulation demonstrates that both Newtonian and non-Newtonian curved orogens can be produced within a Newtonian crust.
Hsui Albert T.
Marshak Stephen
Wilkerson Scott M.
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