Condition-related disasters or Geological Process

Here we review the processes of natural disasters is the primary geological process. Geological processes can be identified as an endogenous process (which works inside the Earth) and exogenous processes (who worked on the surface of the Earth).Endogenous process consists of:

1. Tectonic motion - causing an earthquake. Mengebabkan earthquake fault occurrence in the earth's crust. Earthquake shocks could spark Avalanche or Landslide as happened in Padang Pariaman. The fault that occurred on the seabed could trigger a tsunami (the process occurred at sea or hydrosphere), as happened when the earthquake December 26, 2004 in the Indian Ocean. Meanwhile, the landslide that occurred in the deep ocean trenches can also generate tsunami.
2. Magmatic - raises volcano - causing volcanic eruptions that cause pyroclastic flows or when there is Lava Hot participating crater lake collapsed. Then, deposition of sand on the slopes of the volcano when exposed to heavy rain (atmospheric processes) can lead to Lava flow, either hot or cold lava lava. Examples like that happened Mount Merapi Yogyakarta

Mineralogy

Mineralogy is an earth science that focuses on chemical properties, crystal structure, and physical (including optical) of minerals. This study also covers the process of mineral formation and change.
Initially, the mineralogy is more focused on the classification system of rock-forming minerals. International Mineralogical Association is an organization whose members represent organizations that mineralogical experts from each country. Its activities include the naming of minerals mengelolaan (through the Commission of New Minerals and Mineral Names), location of known minerals, etc.. Up to 2004 there have been more than 4000 species of minerals that are recognized by the IMA. Of all these, the 150 can be classified as "general", 50 others "sometimes", and the rest is "rarely" to "extremely rare"
In recent years, due to the development view of experimental techniques (such as neutron defraksi) and existing computing capabilities have enabled atomic-scale simulation of the behavior of crystals with highly accurate, this science has evolved to encompass broader more general issues in the field of inorganic

7 Based Crystal Sistem Crystaloghrapy

a. Isometric system (Cubic = Tesseral = Tessuler)
This system is also called a regular system, often known as a system of cube / cubic. Number 3 and the crystal axis perpendicular to one another. Each axis of equal length.

1. - Tritetrahedral
2. - Didodecahedral
3. - Hexatetrahedral
4. - Trioctahedral
5. - Hexoctahedral


b. Tetragonal system (Quadratic)
Same with the isometric system, this system has 3 axes of each crystal are perpendicular to each other. Axes a and b have the same unit of length. While the different c-axis, can be longer or shorter (usually longer).

1. - Tetragonal pyramidal
2. - Tetragonal trapezohedral
3. - Tetragonal bipyramidal
4. - Ditetragonal pyramidal
5. - Ditetragonal bipyramidal
6. - Tetragonal tetrahedral
7. - Tetragonal Scalenohedral