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Peridotite



What is Peridotite?

Peridotite is a coarse-grained intrusive igneous rock that is composed almost entirely of olivine. It may contain small amounts of amphibole, feldspar, quartz or pyroxene.

peridotite
Peridotite: The specimen shown is about two inches (five centimeters) across.


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The rock photos above were taken by Ann Bryant and are copyright by Geology.com.
 
Igneous Rocks
Andesite
Andesite		   Basalt
Basalt

Quartz Diorite
Diorite		   Gabbro
Gabbro

Granite
Granite		   Obsidian
Obsidian

Pegmatite
Pegmatite		   Peridotite
Peridotite

Pumice
Pumice		   Rhyolite
Rhyolite

Scoria
Scoria		   Welded Tuff
Tuff




A Guide to Rock Tumbling
Rock Tumblers: Step-by-step guide to tumble-polishing rocks into gemstones. And an article: How to select a tumbler.

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Igneous Rock Photo Gallery: A collection of igneous rock pictures and short descriptions.

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Volcanoes! A page that links to all of our volcano articles and to the best volcano information that we could find.

Racetrack Playa
Sliding Rocks - Racetrack Playa: How these rocks slide across a dry lake bed is a mystery. Photo © iStockphoto / Stephan Hoerold.

Mount Vesuvius images and information
Mount Vesuvius: An interesting article with photos and maps that describes the volcano's eruption history, geologic hazards, plate tectonics and more.

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