What type of rock is an igneous rock?

Answer 1

Igneous rocks are usually classified first by their color index. The color index is separated into four categories. Felsic rocks are the lightest and are composed of mostly quartz and potassium feldspar. Intermediate rocks are the second lightest and are made up of mostly plagioclase feldspar, pyroxene, amphibole, and biotite. Mafic rocks are made up of plagioclase feldspar, pyroxene, and amphibole. Ultramafic is made up of mostly olivine, with pyroxene and amphibole.

Answer 2

Igneous Rocks are formed when hot molten magma cools and crystals form. Igneous rocks can be formed in two ways, under the ground (intrusive igneous rocks) or on the Earth's surface, above the ground (extrusive igneous rocks).

Intrusive igneous rocks are formed when hot molten magma beneath the Earth's surface, gets trapped in pockets of the Earth's crust and slowly cools.

Extrusive igneous rocks are formed when a volcano erupts and hot molten magma

Answer 3

Igneous rocks are crystalline solids which form directly from the cooling of magma. This is an exothermic process (it loses heat) and involves a phase change from the liquid to the solid state. The earth is made of igneous rock - at least at the surface where our planet is exposed to the coldness of space. Igneous rocks are given names based upon two things: composition (what they are made of) and texture (how big the crystals are).

Answer 4

As soon as magma or lava hardens, it would be classified as an igneous rock.

Answer 5

Examples of igneous rock are pumice, basalt, rhyolite, and granite.

Answer 6

Four examples of igneous rocks are pumice, granite, basalt, and obsidian.

Answer 7

granite is a type of igneous rock.

Answer 8

Basalt, granite, rhyolite, and pumice.