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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Canadian Journal of ...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Canadian Journal of Earth Sciences
Article . 1986 . Peer-reviewed
License: CSP TDM
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Folds and folding in the Beardmore–Geraldton fold belt

Authors: M. M. Kehlenbeck;

Folds and folding in the Beardmore–Geraldton fold belt

Abstract

The Beardmore–Geraldton fold belt forms a transitional crustal segment between the Quetico and Wabigoon subprovinces of the Canadian Shield.Bedding surfaces (So) and a bedding-plane schistosity (S1) were folded into asymmetrical to recumbent early folds. These folds were refolded by a later F2 folding episode. The F2 folds possess a penetrative axial-planar schistosity (S2) that is subvertical and generally strikes east–west. F2 hinge lines coincide closely with the axial direction of the early folds.The "structural facing direction (sensu Borradaile)" of F2 folds is either east or west. Folds with consistent facing directions are confined to distinct panels. Panels containing F2 folds with opposing facing directions are in sharp contact with each other. In several panels F2 folds face upward through sideways to downward.Modification of F2 buckle folds by homogeneous compressive strain components produced flattened flexure folds that closely approach folds of the similar fold model class.Further modification of fold shapes occurred in response to shear discontinuities that pervade the fold belt. Sheared F2 fold limbs commonly bind segments containing displaced F2 hinge zones of formerly adjacent folds. Zones of intense shearing show evidence of transposition of earlier fabric elements into the S2 schistosity. These zones of intense shear also form the boundaries of juxtaposed panels in which folds of variable orientation occur.The Beardmore–Geraldton fold belt is a terrain in which displacements along pervasive shear discontinuities of refolded folds and transposition of earlier fabric elements into the S2 schistosity have resulted in a pseudostratigraphy composed of disrupted and rotated segments of a pre-existing sequence of layered rocks.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
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