Marble And Gneiss Are Formed From

Gneiss gneiss is a high grade metamorphic rock meaning that it has been subjected to higher temperatures and pressures than schist it is formed by the metamorphosis of granite or sedimentary rock.

Marble and gneiss are formed from.

Gneiss forming from sedimentary rock is called paragneiss and can form from shale sandstone or basalt while gneiss forming from igneous rock is called orthogneiss and typically forms from granite gabbro or diorite. Paragneiss is gneiss derived from sedimentary rock such as sandstone. However it only forms from igneous rocks and so tends to contain minerals not found in metamorphic rocks formed from sedimentary rock such as marble. Gneiss does not have any particular mineral composition and the term refers only to the banded texture.

The common mineral components are quartz feldspar micas and silicates. Gneiss displays distinct foliation representing alternating layers composed of different minerals however unlike slate and schist gneiss does not preferentially break along planes of foliation. Appearance of gneiss is foliated and that of marble is veined and shiny. Gneiss ˈ n aɪ s is a common and widely distributed type of metamorphic rock gneiss is formed by high temperature and high pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks orthogneiss is gneiss derived from igneous rock such as granite.

Gneiss is available in black brown pink red white colors whereas marble is available in black blue brown grey pink white colors. Most gneiss has very a similar composition to granite.