RocksGroup1

What are rocks? **Rocks are alot of minerals mixed together they can ether be big or small.** What makes rocks different? **Igneous rocks are formed when magma crystallizes and cools into a solid form. There are of 2 types of igneous rocks.**
 * Igneous rocks form when lava or magma cools and minerals crystallize**

Metamorphic rocks are **formed when preexisting rocks are exposed to increases in tempature and pressure to hydrothermal solutions. **Foliated  metamorphic rocks are formed within the Earth's interior under extremely high pressures that are unequal, occurring when the pressure is greater in one direction than in the others (directed pressure). This causes the minerals in the original rock reorient themselves with the long and flat minerals aligning perpendicular to the greatest pressure direction. This reduces the overall pressure on the rock and gives it a stripped look. **Nonfoliated** **metamorphic rocks are formed around igneous intrusions where the temperatures are high but the pressures are relatively low and equal in all directions (confining pressure). The original minerals within the rock recrystallize into larger sizes and the atoms become more tightly packed together, increasing the density of the rock.** Quartzite || || [|05-metamorphic rock names in P-T space.jpg], [|05-metamorphic facies names in P-T space.jpg]
 * [[image:http://www.nssgeography.com/canada9%20web/Unit%20Physical/The%20Rock%20Cycle_files/image033.jpg width="106" height="96"]]

How does one distinguish rocks? **One can distinguish a rock by referring to the rocks Texture.**

Sedimentary rocks are **small pieces of rock that are moved and deposited by water, wind, glaciers, and gravity. The formation of sedimentary rocks is caused by weathering and erosion. Lithification, the physical and chemical process that transform sediments into sedimentary rocks. Cementation occurs when dissolved materials precipate out of ground water and either a new mineral grows between the sediment grains or the same mineral grows between and over the grains. ** Conglomerate || Breccia || Sandstone || Shale ||
 * [[image:http://www.nssgeography.com/canada9%20web/Unit%20Physical/The%20Rock%20Cycle_files/image023.jpg width="129" height="96"]]


 * __Rock Cycle__**