extrusive rock

Table of Contents

Introduction References & Edit History Quick Facts & Related Topics

Images

Tanna Island, Vanuatu: volcanic rock

Figure 25: Cross section of a convergent plate boundary involving a collision between two continental plates near a Himalaya-type mountain chain.

Discover

Gerald R. Ford playing golf during a working vacation on Mackinac Island in Michigan, July 13, 1975. Gerald Ford.

9 U.S. Presidents with the Most Vetoes

Bakers Dozen of Donuts, or Paczki's

Why Is a Baker’s Dozen 13?

earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.

The 6 Deadliest Earthquakes Since 1950

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Bristlecone pine (Pinus Longaeva) on the slope of Mount Washington in Great Basin National Park in the Nevada desert.

How Can Some Trees Survive for Thousands of Years?

extrusive rock: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	extrusive igneous rock • volcanic rock

Photos

Tanna Island, Vanuatu: volcanic rock

Figure 25: Cross section of a convergent plate boundary involving a collision between two continental plates near a Himalaya-type mountain chain.

See All Images →

Topics

pumice basalt perlite rhyolite obsidian trachyte phonolite andesite diabase pitchstone intrusive rock felsic and mafic rocks pegmatite spherulite micropegmatite alkaline rock colour index dike sill laccolith

Quiz

Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.

(Bed) Rocks and (Flint) Stones