phyllonite

phyllonite

[′fil·ə‚nīt]
(petrology)
A metamorphic rock occupying an intermediate position between phyllite and mylonite.
References in periodicals archive ?
Similar rocks also occur north of Guet Point on southern Isle Madame, but most of the Cap Auguet-Guet Point area consists of muscovite-biotite schist and lower grade muscovite-biotite phyllonite.
Despite the shallow crustal level at which deformation occurred, early ductile shearing in the Waite zone generated phyllonite from Fredericton belt pelite and psammite (Ludman 1998) and converted the massive Deblois and Bottle Lake granites to strongly foliated granite, s-c mylonite, and interlayered mylonite and ultramylonite (Wang and Ludman 1999; Wang et al.
The northwestern margin of the Waite composite fault zone is typically a gradational contact between underformed Fredericton belt metasedimentary rocks and their ductile deformed products -- generally phyllonite and sheared metasandstone characterized by penetrative pressure solution cleavage in which clasts are strongly elongated.
In both locations, the early-stage phyllonite is juxtaposed against post-Acadian redbeds or metasedimentary rocks of the Fredericton belt that exhibit little evidence of ductile strain.
The Velke Vrbno unit consists of various types of gneisses, mica schists and phyllonites containing numerous interlayers of amphibolites, acid metavolcanics, crystalline limestones and dolomites.
It consists of phyllites, phyllonites, graphitic phyllites, quartzites, greenschists and line-grained biotite granites.
Moreover, intercalations of phyllites and phyllonites occur, whereas tectonic blocks and slices of sandstones, conglomerates and marbles are less common (Fig.
The most abundant metasediments in the melange are black or dark-blue phyllonites.
It belongs to a tectonic block of orthogneisses included between phyllonites in the lower melange subunit (Fig.
The extensive Orlice-Snieznik Complex is built by orthogneisses, metagranites and migmatites with mica schists, paragneisses and phyllonites of the Stronie Group of the Lower Paleozoic and Upper Proterozoic age.
The 100-130-m-high fault scarp is built up of mica shists, phyllonites and gneisses of the Stronie Unit.
5 km long and oriented N38[degrees]W, cuts alternately gneisses of the footwall, and mica shists and phyllonites of the hanging wall.