Rocks

Limestone is a sedimentary rock that is composed of at least 50% calcium carbonate (CaCO3) in the form of calcite, its main origin is biochemical-organic in a shallow marine environment, but it can also be formed by precipitation. chemistry. in evaporitic continental environments. The main components of the limestone They are calcite (more than 50%), […]

Slate is a very fine-grained (less than 0.5 millimeter) foliated rock composed of tiny flakes of mica that are too small to be visible. It belongs to the group of metamorphic rocks. Therefore, it generally appears opaque and closely resembles shale and siltstone. The board it is most frequently generated by low-grade metamorphism (zeolite to

The texture of an igneous rock is a very important characteristic that serves above all for the identification of that rock. This characteristic refers to the description of the constituent parts, the sizes, arrangement and shapes that mineral grains have in igneous rocks. This article will deal with the different textures of igneous rocks based

The term gravel refers to pieces of rock and minerals that measure more than 2 millimeters in diameter or length. In addition, the term covers debris or rock clasts that are the size of grains, pebbles and blocks. The gravel has several implications according to the application that it is going to be given, for

Flagstone is one of the most interesting varieties of stone used in construction and architecture, even for thousands of years. All this is due to its unique physical and visual properties, as well as its relative abundance in nature. Its importance lies in the fact that it has a wide variety of applications in modern

Marble is a metamorphic rock with a homogeneous appearance (it does not present foliation) that is formed when limestone is subjected to the heat and pressure of metamorphism. It is mainly composed of calcium carbonate CaCO3 (calcite) and dolomite CaMg(CO3)2 and which has many unique properties that make it a valuable rock in different industries.

Coal is a fossil fuel found in sedimentary rocks and is currently one of the most dominant commercial energy sources in the world. Coal is quite different from other sedimentary rocks. Unlike limestone and chert, which are rich in calcite or silica, coal is made primarily of organic matter. Close examination of a lump of

Schist is a medium to coarse grained metamorphic rock in which laminated or micaceous minerals predominate. Components of micas commonly include (muscovite and biotite), which show a planar alignment that gives the rock its foliated texture (metamorphic rock textures). In addition, the shales they contain smaller amounts of other minerals, often quartz and feldspar. They

In this article you will find the meaning, formation, deposits, characteristics and all the important properties of black obsidian, one of the most used stones in the world. Black obsidian is the most abundant type of obsidian that occurs on the earth’s crust. By definition it is a volcanic rock that has been formed by