Why is marble an important metamorphic rock?

Answer 1

First, you need to understand what Metamorphic means. Metamorphic rocks are rocks that have been placed under extreme pressure and temperature changes; intense enough to change the chemistry and crystal structure of the original rock, but not intense enough to melt them completely. What pressure and what temperature it takes to metamorphose a rock depends on the minerals in the rock. Gneiss and Marble have both undergone intense heat and pressure to convert them from their parent rocks into something different. Gneiss can come from different types of rocks being metamorphosed. Granite is common...the white minerals will separate from the black creating a striped rock. There are also green and black, or pink and black gneisses. Marble comes from limestone being put under intense heat and pressure.

Answer 2

Gneiss and Marble were both originally sedimentary rock. They have been subject to heat and/or pressure, which alters their form (physicality).

Marble was originally limestone. (Calcium carbonate ; CaCO3)

Gneiss was originally an igneous rock of varying composition.

Answer 3

It is used in many houshold items, and is an extremely strong material.