___ Australian for Information
The minerals and organic matter are the basic bricks to form the earth's crust rocks, and the various organic materials that are composed of them. There are sporadic rocks formed from sand and gravel, other ceramics made of clay, a third limestone formed of marble and a fourth carbon formed from coal. Each species will be caused by certain factors, and we will talk about the types of rocks and the mechanism of each species to be concise in this article.
The rocks are made up of pyrotechnic rocks, which are formed by the exhaustion and frost of the magma found in the ground. The igneous rocks are considered to be the basis of the formation of all rocks. Examples are granite and basalt rock. The most important characteristics of igneous rocks are: Above each other.
The presence of fossils, ie, the remains of living organisms, including girls and animals, is absent.
They vary in size according to their quality.
They do not contain protrusions between their granules and are therefore silent rocks.
Resist the weather fluctuations of wind, rain, and heat.
It contains a large proportion of metals and therefore its color tends to darken.
Sedimentary rocks
Sedimentary rocks formed after the breakage of the old rocks due to weathering and erosion factors, and then transported by wind or rain in the form of deposits accumulated in low areas, and then obtained cohesion and hardening by the passage of years, and can be classified into four categories according to the factors leading to composition as follows: Resulting from physical mechanical pressure on it called the chalk rocks such as: conglomerates, bricia, jeraniums, sand rocks and mud rocks.
Rocks result from chemical weathering, such as limestone, dolomite.
Rocks resulting from deposition of silica material such as flint and chrysanthemum.
Organic rocks resulting from animal and plant residues such as: coal, phosphate, coke, and chalk.
The most important properties of sedimentary rocks:
It is fragile because it is made up of successive layers, and this is shown by digging and cracks in its composition. Rich in fossils. Their colors are light. Metamorphic rocks The metamorphic rocks formed as a result of extreme heat, extreme pressure, or both. They were originally rock or sedimentary rocks. They were called transient rocks because they were transformed from one type to another. Examples include marble, slate and quartzite.
The most important properties of metamorphic rocks:
Its colors are numerous. The characteristics of the rock before the transformation, whether the origin of the fire and the properties of rock igneous, or sedimentary characteristics of the same. Possibility to be found in active tectonic areas.
Post a Comment