Igneous Protolith To Marble

Metamorphic rock any rock that results from the alteration of preexisting rocks in response to changing conditions such as variations in temperature pressure and mechanical stress and the addition or subtraction of chemical components.

Igneous protolith to marble.

Your textbook incorrectly uses the term source rocks for the pre existing rock. The recrystallization usually obliterates all fossils. Metamorphic rocks and processes metamorphism comes from the greek words meta change morphe form metamorphic rocks form by solid state no melting transformation of preexisting rock by processes that take place beneath earth s surface. Mylonite is a high grade metamorphic rock that is characteristic of a high shear zone and usually has an igneous protolith.

In many cases we can infer the lithology of the rock that was metamorphosed the protolith to produce the metamorphic one. The primary non foliated metamorphic rocks are easily interpreted. It is composed primarily of the mineral calcite caco 3 and usually contains other minerals such as clay minerals micas quartz pyrite iron oxides and graphite under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is. Marble is metamorphosed limestone created by contact metamorphism meaning it is heated through contact by a large igneous intrusion.

Marble a limestone or dolostone made up only of calcite or dolomite will metamorphose to a marble which is made mostly recrystallized calcite or dolomite. Ultramafic protoliths are mainly peridotites and related rocks from the earth s mantle and reflect a rather simple mgo rich silicate composition. Marble is made of calcite or some other carbonate and this mineral is common in only one possible protolith. The most abundant metamorphic products are serpentinites.

All metamorphic rocks are derived by the action of heat and or pressure on pre existing igneous sedimentary or metamorphic rocks. Metamorphic rocks have protoliths and limestone or dolomite are the protoliths of marble. Marble marble is a metamorphic rock made up almost entirely of either calcite or dolomite for which the protolith was either limestone or dolostone respectively. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.

Such marble is often used as decorative stone in buildings. A protolith is the parent rock. Marbles have a variety of colors and are often complexly banded. They are commonly used as a decorative stone.

Limestone or some other carbonate rock. Marbles may have bands of different colors which were deformed into convoluted folds while the rock was ductile.