Question: What Is An Igneous Rock?

What is another name for igneous rocks?

Igneous rocks are also known as magmatic rocks.

Igneous rocks are divided into two types: plutonic and volcanic rock.

Plutonic rock is another name….

What are the five characteristics of metamorphic rocks?

The five basic metamorphic textures with typical rock types are slaty (includes slate and phyllite; the foliation is called “slaty cleavage”), schistose (includes schist; the foliation is called “schistosity”), gneissose (gneiss; the foliation is called “gneissosity”), granoblastic (includes granulite, some marbles and …

What is igneous rock used for?

Igneous rocks have a wide variety of uses. One important use is as stone for buildings and statues. Diorite was used extensively by ancient civilizations for vases and other decorative artwork and is still used for art today (Figure 1). Granite (figure 2) is used both in building construction and for statues.

What are the 3 main types of igneous rocks?

When molten rock, or melted rock, solidifies, igneous rocks are formed. There are two types of igneous rocks: intrusive and extrusive….Extrusive Igneous Rocksandesite.basalt.dacite.obsidian.pumice.

What does igneous rocks look like?

These coarse-grained crystals make the rock look sugary as the flat crystal faces reflect the light in hundreds of little sparkles. The name of the igneous rock depends on what minerals are present. If there are lots of light-colored minerals and the rock is coarse grained, it is granite.

What is the characteristics of igneous rocks?

Igneous rocks can be easily identified with their texture, density, color, and mineral composition. Its texture depends on the shape, size, time period to cool down and solidify, and the arrangement of crystals in the rock. Interested to learn more about other types of rocks, below are the links: Sedimentary rocks.

What are the major types of igneous rocks?

The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.

How do you identify igneous rocks?

Cooling of the magma can occur beneath the surface (plutonic) or on the surface (volcanic). Igneous rocks can be identified by the determination of the composition and texture of the rock. Once these two characteristics have been identified, the Igneous Rock Identification chart is used to identify the rock name.

What are the characteristics of extrusive igneous rocks?

Igneous rocks which form by the crystallization of magma at the surface of the Earth are called extrusive rocks. They are characterized by fine-grained textures because their rapid cooling at or near the surface did not provide enough time for large crystals to grow.

Which term best describes igneous rocks?

Intrusive and Extrusive Igneous Rocks Igneous rocks are called intrusive when they cool and solidify beneath the surface. Intrusive rocks form plutons and so are also called plutonic. A pluton is an igneous intrusive rock body that has cooled in the crust. When magma cools within the Earth, the cooling proceeds slowly.

What is igneous rock and example?

Igneous rocks are formed from the solidification of molten rock material. … Examples of intrusive igneous rocks are diabase, diorite, gabbro, granite, pegmatite, and peridotite. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals.

What is mean by igneous rock?

Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. … Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies.

What are igneous rocks made of?

Igneous rocks are formed from the solidification of magma, which is a hot (600 to 1,300 °C, or 1,100 to 2,400 °F) molten or partially molten rock material. Earth is composed predominantly of a large mass of igneous rock with a very thin veneer of weathered material—namely, sedimentary rock.