Tuesday, February 5, 2013

Geology



*First, granite is made of large mineral grains (which is where its name came from) that fit tightly together.

*Second, granite always consists of the minerals quartz and feldspar, with or without a wide variety of other minerals (accessory minerals). 

*Third, almost all granite is igneous (it solidified from a fluid state) and plutonic (it did so in a large, deeply buried body or pluton).



*Limestone is a sedimentary rock composed primarily of calcium carbonate (CaCO3) in the form of the mineral calcite.

* It most commonly forms in clear, warm, shallow marine waters. It is usually an organic sedimentary rock that forms from the accumulation of shell, coral, algal and fecal debris

* It can also be a chemical sedimentary rock formed by the precipitation of calcium carbonate from lake or ocean water.


*Marble is a non-foliated metamorphic rock that is produced from the metamorphism of limestone. It is composed primarily of calcium carbonate. 

* It is composed primarily of calcium carbonate. Marble is commonly used for sculptures and as a building material. Marble is a rock resulting from metamorphism of sedimentary carbonate rocks also.

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*Quartz is a silicate mineral and the most common mineral of the continental crust

*It occurs as clear or cloudy crystals in a range of colors. It's also found as massive veins in igneous and metamorphic rocks.

*Quartz is the standard mineral for hardness 7 in the Mohs hardness scale.


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