Formation of Rocks

FORMATION OF THE ROCKS

The origin of the rocks is very diverse, as are both of them, as different as their forms, composition, colors and features, it is surprising the origin of the different rocks that can be divided into three groups: igneous, metamorphic and sedimentary.

- Igneous rocks, its name indicates its origin, are rocks that come from the fire, are rocks that come from volcanoes that erupt when they throw the magma to the surface, the magma is liquid rock that is inside of the earth rises and when cooled, form the different rocks, this will depend on the location and the cooling rate (granite, diorite etc.).

- The metamorphic rocks, as the name suggests, are rocks that come from other rocks are rocks were igneous or sedimentary and when folded in the crust, have been subjected to pressures and high temperatures, which have transformed into other rocks (marble, quartzite etc.).

- Sedimentary rocks are formed by atmospheric elements that erode the mountains and the rest of the rocks, then depositing them in the lowlands, the forms of erosionarlas are wind, rain, ice, water currents, changes in etc. temperature. They are then washed away by water currents, which deposited in lakes, seas, estuaries and marshes, allowing them to be deposited in a large number of fossils, the very clay and sand, through pressure and heat that this generates, are made of concrete and rock, as (slate, plaster etc.).

These three main groups of rocks are formed by a large number of rocks, which have their particular characteristics, all the rocks in turn are composed of minerals, a rock, always consists of several minerals, we must consider that a mineral composition is uniform, our planet has about three thousand different minerals, which are composed of a mixture of pure elements 103, each mineral can be composed of a single element or combination of elements, the minerals can be classified into 8 categories.

Crystals are minerals that have had the time and conditions necessary to acquire a particular organization in their molecules, each mineral has a chance

to order the molecules that compose a single crystalline form, a crystal can be formed while the magma is still liquid and others at the time of cooling, crystals can take thousands of years to form, but were formed millions of years; others only take minutes to form, as with common salt, CLNA.

“The rock cycle”: We could say that the rocks are continuously formed and destroyed, settle, sink into the ground, pressed, heated and come to merge, then re-form, but the same molecules, each time in a rock, form a different rock, not only in form but also in their structure and properties, can be crystals or not.

The crust is a thin layer floating on the magma, is the only hard area of the planet, the crust is 0.4% of the planet’s mass is composed of oxygen, silicon, aluminum, magnesium, calcium, sodium, potassium, iron, are the 8 elements that make up 99% of the earth’s crust, on the continents, the crust is about 35 km thick and the seabed, about 7 km, obviously this is not uniform, but maintains a thickness similar throughout the planet’s surface, with obvious oscillations, which occur both on the surface and inside, in the magma, which in some areas is much closer to the surface, even to go outside, looking for cracks or areas weaknesses.