Igneous Rocks - Types, Properties, and Examples
Jan 31, 2024 · Main Types of Igneous Rocks. The main classification of igneous rocks is by their formation: Volcanic or Extrusive Igneous Rocks. These rocks form when magma erupts onto the Earth’s surface, where it is called lava, and cools rapidly. This rapid cooling often results in fine-grained textures. Examples of extrusive igneous rocks include:
Igneous rock - Wikipedia
Igneous rocks occur in a wide range of geological settings: shields, platforms, orogens, basins, large igneous provinces, extended crust and oceanic crust. Volcanic eruptions of lava are major sources of igneous rocks. (Mayon volcano in the Philippines, erupting in 2009)
Pictures and Descriptions of Igneous Rock Types - ThoughtCo
Jun 2, 2019 · Learn more about the major types of igneous rock, which includes plutonic, intrusive, and extrusive igneous rocks.
Igneous Rocks | Pictures of Intrusive and Extrusive Rock Types
We describe these two basic types: Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form. Examples of intrusive igneous rocks are: diabase, diorite, gabbro, granite, pegmatite, and peridotite.
Types of Rocks – Igneous, Sedimentary, Metamorphic
Jul 9, 2023 · The three major types are igneous, sedimentary, and metamorphic rocks. This classification is essential to geologists as it provides critical information about the history of specific regions on Earth. These rocks change forms via the rock cycle.
Igneous rock | Characteristics, Examples, Formation, & Types ...
Oct 9, 2024 · Igneous rocks constitute one of the three principal classes of rocks, the others being metamorphic and sedimentary. 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.
Igneous Rocks - Geology (U.S. National Park Service)
Nov 8, 2023 · There are two broad types of igneous rocks: Intrusive (plutonic) rocks. Extrusive (volcanic) rocks; Intrusive (Plutonic) Rocks. Intrusive igneous rocks solidify within Earth. These rocks are also known as plutonic rocks—named for Pluto, the Roman god of the underworld.
Igneous Rocks - National Geographic Society
Oct 19, 2023 · 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 …
Igneous Rocks – Definition, Types, Examples, & Pictures
Feb 17, 2023 · The igneous rocks are one of the three main types of rock found on earth; the others are sedimentary rock and metamorphic rock. They are the hardest and heaviest rock on earth. They are also called the ‘new’ rocks or magmatic rocks.
What are igneous rocks? | U.S. Geological Survey - USGS.gov
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. Great globs of molten rock rise toward the surface.