The formation of basalt, what rock basalt belongs to

Basalt belongs to magmatic rocks.

Basalt belongs to magmatic rock, the main components of basalt are silica, aluminum oxide, iron oxide, calcium oxide, magnesium oxide, of which silica contains the most, accounting for about 45 to 50 percent.

Uses of basalt.

1. Poreous basalt, also known as pumice, porous basalt, pores are hard and multi-quality, can be mixed into concrete, reduce the weight of concrete, not only strong and durable, but also has the characteristics of sound insulation and heat insulation, and is a good aggregate for light concrete of high-rise buildings.

2. Pumice stone is still a good abrasive, which can be used to grind metal and stone. Filters, dryers, catalysts, etc. can also be used industrially. It is also widely used in garden landscapes, mainly as rockeries, potted plants, etc., and also used for home decoration.

In addition, basalt tables, tea trays, etc. are also on the market.

Comparison of basalt and granite hardness

Generally speaking, basalt and granite belong to the igneous rock type, which is more hard, while sandstone and limestone belong to the sedimentary rock type, which is relatively soft.

Sandstone can be divided into many types, such as quartz sandstone, silica is very high, and it is also relatively hard, sometimes even harder than basalt. The hardness of basalt and granite is about the same, and the slightly harder granite mainly depends on the composition, and there are many types of basalt and granite, such as andesite basalt and diorite granite. But what is certain is that limestone is certainly the softest of them all.

Basalt is a kind of mafic ejecta rock, which is a dense or foamy structure rock formed by the magma ejected by volcanoes after cooling on the surface of the earth. Its rock structure is often stomatous, almond-like and porphyry, sometimes with large mineral crystals, and the unweathered basalt is mainly black and gray, but also black-brown, dark purple and gray-green.

The bulk density of basalt is very large, and its compressive strength can reach 300MPa or even higher if it has a dense structure, but if it has crystal impurities and pores, the strength will be reduced.

Basalt has high durability and many joints, and the joint planes are mostly hexagonal (in basalt lava flows, the vertical condensation surface of the rock often develops into regular hexagonal columnar joints).And brittle, because of the leakage banquet and not easy to mine large stones, because of the pores and almond structure is common, although the basalt surface is widely distributed, but can be used as a facing stone is not much.

Basalt is a rock with a dense or foamy structure formed by the cooling and solidification of magma from volcanic eruptions.

It belongs to magmatic rocks in the classification of rocks in geology.

Magmatic rocks are divided into two types: intrusive rocks and ejective rocks, among which intrusive rocks are underground magma invading the upper part of the earth's crust under the action of internal forces, and the rock layer is cooled and solidified to form rocks. Ejecta rock is the underground magma under the action of internal force, along the weak area of the crust of the Crust to eject the surface condensation and form rock, its mineral crystalline particles are fine, some have rhyolites or stomatal structure, the representative rock is basalt.

In terms of application, basalt is produced"Cast stone"It is harder and wear-resistant than alloy steel, and more resistant to corrosion than lead and rubber. At the same time, basalt can also be pumped into glass filament, which is stronger alkali resistance than ordinary glass filament, and has good high temperature resistance.

The basalt oceanic crust is mainly composed of mafic volcanic rocks. It is the most important component of the earth's oceanic crust and the moon and the moon, and is also an important component of the earth's continental crust and the moon.

The main components of basalt are silicon dioxide, aluminum trioxide, iron oxide, calcium oxide, magnesium oxide (and a small amount of potassium oxide and sodium oxide), of which silica content is the largest, accounting for about 45 to 50 percent.

The color of basalt is mostly black, black-brown or dark green; The basalt rocks near the Tengchong volcanic group are mostly blue-gray, but there are also dark red, orange, and yellow. Because of its dense texture, its specific gravity is heavier than that of both granite and limestone.