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Home
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Rocks
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Igneous Rocks
» Peridotite
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:
The specimen shown is about two inches (five centimeters) across.
Igneous Rocks
Metamorphic Rocks
Sedimentary Rocks
Sliding Rocks of Racetrack Playa
Spectacular Yosemite Rockfall
Free Guide to Rock Tumbling
Coal Through a Microscope
Uses of Granite
Petroglyphs
and
Pictographs
Rocks and Minerals
The rock photos above were taken by Ann Bryant and are copyright by Geology.com.
Igneous Rocks
Andesite
Basalt
Diorite
Gabbro
Granite
Obsidian
Pegmatite
Peridotite
Pumice
Rhyolite
Scoria
Tuff
Rock Tumblers:
Step-by-step guide to
tumble-polishing rocks
into
gemstones
. And an article:
How to select a tumbler
.
Igneous Rock Photo Gallery:
A collection of igneous rock pictures and short descriptions.
Photos of Kilauea Lava:
Spectacular USGS photos of lava flows pouring into the Pacific.
Volcanoes!
A page that links to all of our volcano articles and to the best volcano information that we could find.
Sliding Rocks - Racetrack Playa:
How these rocks slide across a dry lake bed is a mystery. Photo © iStockphoto / Stephan Hoerold.
Mount Vesuvius:
An interesting article with photos and maps that describes the volcano's eruption history, geologic hazards, plate tectonics and more.
Metamorphic Rocks:
Photos and facts about foliated and non-foliated metamorphic rocks.
Sedimentary Rocks
: Photos and facts about clastic, chemical and organic sedimentary rocks.
