Question

What is a non foliated rock

Answer 1

Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure. Non-foliatedmetamorphic rocks such as hornfels, marble, quartzite, and novaculite do not have a layered or banded appearance

Answer 2

Nonfoliated Metamorphic Rocks

Nonfoliated metamorphic rocks are formed around igneous intrusions where the temperatures are high but the pressures are relatively low and equal in all directions (confining pressure). The original minerals within the rock recrystallize into larger sizes and the atoms become more tightly packed together, increasing the density of the rock.

Nonfoliated metamorphic rocks are identified on the basis of their composition:

Quartzite = composed of the mineral quartz; metamorphosed sandstone

Marble = composed of the mineral calcite; metamorphosed limestone