Шаговый камень (материал

Описание и отзывы

Характеристики

Sizes Available:

 

80 - 200 mm

200 - 350 mm

 

 

 

Schist is a medium-grade metamorphic rock^[ with medium to large, flat, sheet-like grains in a preferred orientation (nearby grains are roughly parallel). It is defined by having more than 50% platy and elongated minerals, often finely interleaved with quartz and feldspar.These lamellar (flat, planar) minerals include micas, chlorite, talc, hornblende, graphite, and others. Quartz often occurs in drawn-out grains to such an extent that a particular form called quartz schist is produced. Schist is often garnetiferous. Schist forms at a higher temperature and has larger grains than phyllite.Geological foliation (metamorphic arrangement in layers) with medium to large grained flakes in a preferred sheetlike orientation is called schistosity.

 

Ref:  http://en.wikipedia.org/wiki/Schist