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. 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. The hardness of gneiss is 7 and that of marble is 3 4. Most gneiss has very a similar composition to granite.

Gneiss does not have any particular mineral composition and the term refers only to the banded texture. Marble is a non foliated metamorphic rock which is composed of recrystallized carbonate which is formed when limestone is exposed to high temperatures and pressures over a long time gneiss is a common and widely distributed type of rock formed by high grade regional metamorphic processes from pre existing formations that were originally either. 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.

Properties of rock is another aspect for gneiss vs marble. The common mineral components are quartz feldspar micas and silicates.