felsic and mafic rocks

Table of Contents

Introduction References & Edit History Quick Facts & Related Topics

Discover

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

7 Deadliest Weapons in History

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

Is Cinco de Mayo Mexico's Independence Day?

Portrait of a mountain gorilla at a short distance. gorilla close up portrait.The mountain gorilla (Gorilla beringei beringei)

Falling Stars: 10 of the Most Famous Endangered Species

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

felsic and mafic rocks: Facts & Related Content

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

Facts

Also Known As	silicic rock • felsite • acid rock

Topics

granite petuntse rhyolite dacite granodiorite quartz monzonite I-type granite pantellerite S-type granite rapakivi mafic rock pegmatite spherulite micropegmatite alkaline rock colour index dike sill laccolith crystallite

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