Mineral composition of rocks Not Mineral Supplements
An important factor for the formation of minerals in a rock mass massive chemical composition, for a certain mineral can be formed when the necessary elements are present in the rock. Calcite is most common in limestone, since it consists mainly of calcium carbonate, quartz is common in some sandstone and volcanic rock with a high percentage of silica.
Other factors are equally important in determining the natural association or para genesis of the rock-forming minerals, particularly the method of origin of the rock and the stages it passed in the current state of implementation. Two measures of the rock composition is very similar and yet most entirely composed of different assemblages of minerals. The tendency is always for those who will form stable compounds under conditions which created the rock mass. A granite arises by the consolidation of a molten magma at high temperatures and high pressures and the constituent minerals are stable in such circumstances. Exposed to moisture, carbonic acid and other subaerial agents at the normal temperature of the surface of the earth, some of these original minerals, such as quartz and white mica are relatively stable and remain intact, others weather or decay and are replaced by new combinations. Feldspar Muscovite becomes kaolinite and quartz, and any Mafic Mineral Supplements such as pyroxenes, amphiboles or biotite have been present are often altered chlorite, epidote, rutile and other substances.
These changes are accompanied by disintegration, and grab a stone loose, crumbly mass of dust that can be regarded as a sand or earth. Materials formed in this way can be washed away and deposited as sandstone or silt. Original rock structure is now replaced by a new mineralogical constitution is profoundly changed, but most of the chemical composition is not very different. Sedimentary rocks can again undergo metamorphosis. If penetrated by igneous rocks can be crystallized or when under the pressure of the high heat and movement during mountain building, can be converted into a gneiss not very different in mineralogical composition radically different from the structure of granite which was its original state .
An important factor for the formation of minerals in a rock mass massive chemical composition, for a certain mineral can be formed when the necessary elements are present in the rock. Calcite is most common in limestone, since it consists mainly of calcium carbonate, quartz is common in some sandstone and volcanic rock with a high percentage of silica.
Other factors are equally important in determining the natural association or para genesis of the rock-forming minerals, particularly the method of origin of the rock and the stages it passed in the current state of implementation. Two measures of the rock composition is very similar and yet most entirely composed of different assemblages of minerals. The tendency is always for those who will form stable compounds under conditions which created the rock mass. A granite arises by the consolidation of a molten magma at high temperatures and high pressures and the constituent minerals are stable in such circumstances. Exposed to moisture, carbonic acid and other subaerial agents at the normal temperature of the surface of the earth, some of these original minerals, such as quartz and white mica are relatively stable and remain intact, others weather or decay and are replaced by new combinations. Feldspar Muscovite becomes kaolinite and quartz, and any Mafic Mineral Supplements such as pyroxenes, amphiboles or biotite have been present are often altered chlorite, epidote, rutile and other substances.
These changes are accompanied by disintegration, and grab a stone loose, crumbly mass of dust that can be regarded as a sand or earth. Materials formed in this way can be washed away and deposited as sandstone or silt. Original rock structure is now replaced by a new mineralogical constitution is profoundly changed, but most of the chemical composition is not very different. Sedimentary rocks can again undergo metamorphosis. If penetrated by igneous rocks can be crystallized or when under the pressure of the high heat and movement during mountain building, can be converted into a gneiss not very different in mineralogical composition radically different from the structure of granite which was its original state .
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