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.

*

*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.


No comments:

Post a Comment