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geology
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References & Edit History Quick Facts & Related Topics
Images, Videos & Interactives
faux amphibolite pahoehoe Plumb the depths of geologic time. alkalic syenite banded-iron formation (BIF) coal barges
What are glaciers? Ask a glaciologist
thermal conductivity measurement types of faulting in tectonic earthquakes crustal generation and destruction
For Students
thermal conductivity measurement
geology summary
Quizzes
Michael Faraday (L) English physicist and chemist (electromagnetism) and John Frederic Daniell (R) British chemist and meteorologist who invented the Daniell cell.
Faces of Science
Cross section of Earth showing the core, mantle, and crust
Everything Earth
Cross section of Earth showing the core, mantle, and crust
The Solid Earth Quiz
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
36 Questions from Britannica’s Most Popular Science Quizzes
Discover
Albert Einstein in Washington, D.C. c. 1921-1923. Physicist
The Solar Eclipse That Made Albert Einstein a Science Celebrity
Stylish light blue jeans on wooden background, closeup of inset pocket
Why Do Jeans Have That Tiny Pocket?
Solar Eclipse, Eclipse, Solar Flare, Outer Space, Astronomy
What Causes Lunar and Solar Eclipses?
African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.
Timeline of the American Civil Rights Movement
VAN, TURKEY - OCTOBER 25: A building and car ruined during the earthquake of Van-Ercis on October 25, 2011 in Van, Turkey. It is 604 killed and 4152 injured in Van-Ercis Earthquake.
What Is an Aftershock?
Young men throw balloons and glitter from above the mosque at the celebration Eid Al-Fitr after prayers playing with balloons outside of Al-seddeeq mosque, Al-Mansourah, Egypt. 17 July 2015.
Eid al-Fitr
solar eclipse, sun, moon, astronomy, space
How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipses?

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Videos

What are glaciers? Ask a glaciologist
Glaciologist Bethan Davies explains the science behind glaciers and how glaciers...
Video: Encyclopædia Britannica, Inc.
How volcanoes work, explained by a volcanologist
Volcanologist Janine Krippner dives into the details of how volcanoes work and the...
Video: Encyclopædia Britannica, Inc.
Investigate the role of water in erosion and in the greater geologic rock cycle
Water plays a large part in the erosion of rocks.
Video: Encyclopædia Britannica, Inc.
What new opportunities and risks come with harnessing geothermal energy?
Learn about the opportunities and risks of drilling for geothermal energy in Iceland.
Video: Contunico © ZDF Studios GmbH, Mainz
geologist
Job description of a geologist.
Video: CandidCareer.com (A Britannica Publishing Partner)

Images

faux amphibolite
A rock formation called “faux amphibolite,” from the Nuvvuagittuq greenstone belt...
Jonathan O'Neil
pahoehoe
Pahoehoe lava flow, Kilauea volcano, Hawaii, November 1985. Pahoehoe lava flows are...
J. D. Griggs, U. S. Geological Survey
alkalic syenite
Nepheline (greasy light gray), sodalite (blue), cancrinite (yellow), feldspar (white),...
Courtesy of Northwestern University Geology Department, Evanston, Illinois; photograph, Katherine H. Jensen/Encyclopædia Britannica, Inc.
banded-iron formation (BIF)
A banded-iron formation (BIF) rock recovered from the Temagami greenstone belt in...
Prof. Dr. Michael Bau/Jacobs University Bremen
coal barges
Coal barges on the Finow Canal at Eberswalde, Germany.
© Caio Garrubba/Madeline Grimoldi
thermal conductivity measurement
Professor Anne Hofmeister loading a rock sample into a laser-flash apparatus to measure...
Professor Randy Korotev in Department of Earth and Planetary Sciences, Washington U., St. Louis MO.
types of faulting in tectonic earthquakes
Types of faulting in tectonic earthquakes. In normal and reverse faulting, rock masses...
Encyclopædia Britannica, Inc.
crustal generation and destruction
Three-dimensional diagram showing crustal generation and destruction according to...
Encyclopædia Britannica, Inc.
Mayon Volcano
The 1984 eruption of Mayon Volcano, Luzon, Philippines.
C.G. Newhall/U.S. Geological Survey
Steno's four laws of stratigraphy
Encyclopædia Britannica, Inc.
geologic time
The stratigraphic chart of geologic time.
Encyclopædia Britannica, Inc. Source: International Commission on Stratigraphy (ICS)

Interactives

Plumb the depths of geologic time.
Discover how old Earth is and discover the timing of important events in Earth's...
Encyclopædia Britannica, Inc.
VIEW MORE in these related Britannica articles: