Synopsis
In the Lewisian rocks north-west of Loch Tollie corresponding deformation during three successive phases of the Laxfordian orogeny is shown in meta-sediments, hornblende-schists, amphibolites and acid gneisses. Isoclinal folds, some drag folds and open folds and associated axial planar schistosity/foliation and mineral and intersection lineations were developed during the
main phase
of deformation. Asymmetrical folds, of which the Tollie anticline is the most prominent, refold the isoclinal folds and the associated main phase structures. Antiforms predominate, the synforms being largely represented by shear-belts. This
mid phase
deformation produced the dominant N.W.-S.E. trend of the lithological layers and the main phase foliation and the pattern of alternating belts of south-easterly and north-westerly plunging main phase lineation. After the emplacement of acidic veins and sheets,
late phase
deformation resulted in the development of steeply-plunging brittle folds and shear-belts with pseudo-tachylite.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.