Description of Marble
According to its definition in the main Britannica, marble, granular limestone or dolomite, that is, rock particles consisting of calcium-magnesium carbonate; They are rock fragments that recrystallize under the influence of heat, pressure and aqueous solutions.
Its main ingredient is calcite; secondary minerals are minerals such as quartz, hematite, pyrite and chlorite. Their colors are usually white and gray. Depending on the type of secondary mineral, the color can be red, purple, pink, yellow, black, green. (Encyclopædia, Britannica, Marble, https://www.britannica.com/science/marble-rock. 15 February 2018)
Petrographically, marbles are huge rather than thin-bedded, and under the microscope, a rare calcite grain that does not show a crystalline trace consists of a mosaic. These pass through small cracks that match the rhombohedral division of the calcite (threshold forms intersecting with the plane of refraction). In heavily deformed rocks, the grains show lines and can be stretched or crushed in a certain direction.
Marbles often mix with metamorphic rocks such as mica schists, phyllites, gneisses and granulites, and appear in the older layers of the earth’s crust buried deep in excessively folded and magmatic attack areas. The transition from fossil rich limestones to true marbles in such metamorphic areas is a common phenomenon. Recrystallization of the rock material, as in Afyon, Denizli and Burdur regions, has not completely destroyed or changed organic structures.