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Rocks: Igneous, Metamorphic and Sedimentary
Rocks hold the history of the earth and the materials that will be used to build its future.
Sliding Rocks - Racetrack Playa
How these rocks slide across a dry lake bed is a mystery. Photo © iStockphoto / Stephan Hoerold
Coal Through a Microscope
: Coal is more than a black rock. It's THE most interesting rock.
Step-by-step guide to tumble-polishing rocks into gemstones.
Uses of Granite:
The rock used everywhere from the kitchen to the facing stone of skyscrapers.
"A Grain of Sand"
: A gallery of sand grains photographed through a microscope by Dr. Gary Greenberg.
"My students come to class thinking that dirt is dirt and sand is sand...".
NASA at Racetrack Playa:
Visit Racetrack Playa to solve the mystery of the sliding rocks.
Spectacular Yosemite Rockfall:
A photo sequence of rockfall and debris avalanche by Herb Dunn.
"We learn geology the morning after the earthquake."
Ralph Waldo Emerson
: Photos and facts about intrusive and extrusive igneous rocks.
: People have been producing rock art for thousands of years. A world-wide collection.
Carbonatite Lava Flows at Oldoinyo Lengai:
These CO2-rich lavas flow like motor oil.
Excavation in Syria reveals an obsidian trade and copper metallurgy at 4000 BC.
Elementary students find lots of rocks that you will not be able to identify.
Rock characteristics reveal Native American travel routes.
Mineral Show Photos:
From the 2010 Tucson Gem, Mineral & Fossil Show.
"Oil is found in the minds of men."
: Photos and facts about foliated and non-foliated metamorphic rocks.
is a talc-rich rock with properties that make it suitable for a variety of projects.
Get a collection of sedimentary, metamorphic and igneous rocks.
Where Rocks are Made of Ice:
Rocks on Saturn's moon Titan are likely made of water ice.
Mars Mystery Rock:
What are these coatings on rocks at a young crater?
Great Bahama Bank:
A spectacular image of the Bank, islands and surrounding ocean.
"The present is the key to the past."
: Photos and facts about clastic, chemical and organic sedimentary rocks.
The rock that is quickly transforming the energy industry by yielding natural gas.
is a diverse material. This gallery includes photos of sand from around the world.
A versatile rock used in cement, food, paint, paper, drugs, concrete & more!
Banded Iron Formations:
A new model is proposed for the origin of BIFs.
Rocks on Mars
: Many of the rocks found on Mars are not very different from Earth rocks.
"The best geologist is the one who has seen the most rocks."
Herbert Harold Read
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