What Rocks Are Igneous?

Maya Lin-Takahashi
Maya Lin-Takahashi
• • 6 min read

These Rocks Include: Andesite, Basalt, Dacite, Obsidian, Pumice, Rhyolite, Scoria Scoria Scoria Forms When Magma Containing Abundant Dissolved Gas Flows from a...

What Rocks Are Igneous?

These rocks include: andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria

scoria
Scoria forms when magma containing abundant dissolved gas flows from a volcano or is blown out during an eruption. As the molten rock emerges from the Earth, the pressure upon it is reduced and the dissolved gas starts to escape in the form of bubbles.
, and tuff. 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.

What are the 4 types of igneous rocks?

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

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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.
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Intrusive Igneous Rocks
  • diorite.
  • gabbro.
  • granite.
  • pegmatite.
  • peridotite.
Maya Lin-Takahashi

Maya Lin-Takahashi

Consumer Tech & Gadget Reviewer
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Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.