What Are 5 Facts About Igneous Rocks?

What is a fact about igneous rocks?

Igneous Rocks Facts.

Igneous comes from the Latin word ‘ignis’ which actually means fire.

“Igneous” is a word used for rocks that have formed by the cooling and hardening of molten lava or magma.

The upper section of the Earth’s crust is made up of around 95% igneous rock..

What are 5 examples of igneous rocks?

These rocks include: andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff. Pictures and brief descriptions of some common igneous rock types are shown on this page.

What are the five characteristics of igneous rocks?

Igneous rocks can be easily identified with their texture, density, colour, 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.

How old is the igneous rock?

4.6 billion yearsIgneous processes have been active since the onset of the formation of Earth some 4.6 billion years ago.

Where are igneous rocks found?

Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.

How do igneous rocks help our lives?

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 5 facts about metamorphic rocks?

The word metamorphic literally means “changed form”. Slate, a metamorphic rock, can form from shale, clay or mudstone. The Taj Mahal in India is made entirely of different types of marble, a metamorphic rock. Serpentine is a type of metamorphic rock that originates as the igneous rock periodite.

What are the 2 main types of igneous rocks?

Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies. Intrusive Igneous Rocks: Intrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth.

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 is the youngest rock?

sedimentary rockSo the fault must be the youngest formation that is seen. The intrusion (D) cuts through the three sedimentary rock layers, so it must be younger than those layers. The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top.

What do igneous rocks look like?

Extrusive, or volcanic, igneous rocks look dull and do not sparkle much because they are fine grained. … These crystals make a coarse-grained igneous rock called plutonic, or intrusive, igneous rock because the magma was intruded into cracks deep under the earth’s surface.

What are the 10 types of rocks?

Rocks: Igneous, Metamorphic and SedimentaryAndesite.Basalt.Dacite.Diabase.Diorite.Gabbro.Granite.Obsidian.More items…