What are 4 common igneous rocks?

Igneous rocks can be divided into four categories based on their chemical composition: felsic, intermediate, mafic, and ultramafic.

Which of the following is an example of an igneous rock?

Granite, Gabbro, Pegmatite, Basalt, Volcanic, Breccia, and Tuff are examples of igneous rocks. Granite is a light-colored igneous rock with grains large enough for the unaided eye to be visible. It emerges from the gradual crystallization of magma below the surface of the Earth.

Is pumice igneous rock?

Pumice is pyroclastic igneous rock that was almost completely liquid at the moment of effusion and was so rapidly cooled that there was no time for it to crystallize. When it solidified, the vapours dissolved in it were suddenly released, the whole mass swelling up into a froth that immediately consolidated.

What igneous rocks are used in everyday life?

One of the most common igneous rocks is granite (Figure below). Many mountain ranges are made of granite. People use granite for countertops, buildings, monuments and statues. Pumice is also an igneous rock.

Is limestone an igneous rock?

Limestone is not an igneous rock; it is a sedimentary rock.

What are the 5 textures of igneous rocks?

Igneous Rock Textures Igneous textures are used by geologists in determining the mode of origin of igneous rocks and are used in rock classification. There are six main types of textures; phaneritic, aphanitic, porphyritic, glassy, pyroclastic and pegmatitic.

What are some igneous rock types?

Pictures and brief descriptions of some common igneous rock types are shown on this page. Dacite is a fine-grained, extrusive igneous rock that is usually light in color. It has a composition that is intermediate between rhyolite and andesite. The specimen shown is about four inches (ten centimeters) across.

What is an example of extrusive igneous rock?

One example of extrusive igneous rock – igneous rock that cools above the surface of the ground rather than beneath – is obsidian. Obsidian is smooth like glass and usually jet black, although it can be seen in a variety of colors. While it is rather fragile, obsidian breaks with a conchoidal fracture and has very sharp edges.

What are some examples of igneous rocks made of silica?

Rhyolite is another silica-heavy example of igneous rock, prone to explosion in eruptions. Its composition also contains large portions of quartz and feldspar. Eruptions of rhyolite often create the igneous rocks obsidian and pumice. Rhyolite is used to manufacture stone tools but is too soft to be an effective stone tool itself.

What are igneous rocks used for?

This is one of the most abundantly found igneous rocks. Almost the entire basins of the oceans are made up of basalt rocks. It is used for road constructions, and also as a concrete aggregate. It also comes in handy for building veneers, stone objects and monuments. This is an intermediate rock between andesite and rhyolite.