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Geologist Tools
Geologist Tools - Visit our store for a large selection of field and laboratory tools.
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Shale
Shale - The rock that has quickly transformed the oil and gas industry.
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Opals
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
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Basalt
Basalt - Most of the ocean basin and part of the continents are underlain by basalt.
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Minerals
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
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Granite
Granite - The intrusive igneous rock that underlies continents and countertops.
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Volcanoes in Space
Extraterrestrial Volcanoes - Earth is not the only solar system body with volcanic activity.
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The Brewery Rock ?
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
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Rocks
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
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Geology.com News
Geology.com News is updated several times each week. Read it here or receive email updates.
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Gemstones
Gemstones - Colorful images and articles about diamonds and colored stones.
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Land Below Sea Level
Land Below Sea Level - Did you know that dozens of land locations are below sea level?
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Diamonds
Diamonds - Learn about the properties of diamond, its many uses and diamond discoveries.
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Pavlof Volcano
Pavlof Volcano is one of the most active volcanoes in North America and a threat to air traffic.
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Plate Tectonics
Plate Tectonics - Articles, maps, information about plate tectonics and the interior of Earth.
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Homeowners Insurance
Homeowners Insurance usually does not cover the most common geologic hazards.
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What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
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Mount Vesuvius
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
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Ammolite
Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.
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Troglobites
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
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Oil and Gas
Oil and Gas - Articles about oil and natural gas in the US and around the world.
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Uses of Gold
The Many Uses of Gold - Unique properties make gold one of the most useful metals.
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Sliding Rocks
Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
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Find Minerals & Gems
Find Minerals and Gems - Dozens of sites where you can dig and keep what you find.
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Asteroid Impact Map
Asteroid Impact Map - Explore fifty of the most obvious asteroid impact craters on Earth.
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Lunar Rift System
Lunar Rift System? Gravity maps revise the geologic history of the near side of the moon.
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Misconception
Diamond Misconception - Lots of people think that diamonds form from coal. Not True!
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Fluorescent Minerals
Fluorescent Minerals glow with spectacular colors under ultraviolet light.
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Peridotite
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
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Volcanoes
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
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Rock Art
Rock Art - People have been marking on rocks for thousands of years.
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Bear Attacks
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
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Obsidian
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
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Fossils
Fossils - Learn about fossils and fossil discoveries around the world.
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Novarupta
Most Powerful Eruption of the 20th Century - One hour later, the blast was heard in Juneau.
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Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
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Teacher Resources
Teacher Resources - K-12 resources for teaching about earth science.
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100+ Gemstones
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
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Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
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Sea Level Rise Map
Sea Level Rise Map - A Google map that shows where flooding will occur as sea level rises.
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Tallest Tsunami
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
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What is LNG?
What is LNG? The use of LNG as an energy source is growing rapidly. Learn more about LNG.
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What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
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Astronomy
Astronomy - Fantastic images and articles about solar system and deep-space astronomy.
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Gems from Space
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
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Labradorite
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-colors
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Emerald
Emerald is the most popular green gemstone in the United States and most of the world.
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Facts About Copper
Facts About Copper - Information about copper uses, production, resources and more.
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US Diamond Mines
US Diamond Mines - Did you know that diamonds have been found in the United States?
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Volcanic Explosivity
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
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Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
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Meteorites
Meteorites - Rocks that were once parts of planets or large asteroids.
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Turquoise
Turquoise - A blue to bluish-green gem material that has been used for over 6000 years.
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Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
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Iolite
Iolite is the gem variety of the mineral cordierite. An alternative to sapphire and tanzanite.
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Pumice
Pumice is a rock formed during explosive volcanic eruptions. It has a wide variety of uses.
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San Andreas Fault
The San Andreas Fault - A feature that separates the Pacific and North American Plates.
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Soapstone
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
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Organic Gems
Organic Gems are gems formed from or by plants or animals. They might also be fossils.
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What is Geology?
What is Geology? - The study of Earth materials, structures, processes and life over time.
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Tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
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Largest Earthquake
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
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Horizontal Drilling
Horizontal Drilling has opened new resources and significantly improved productivity.
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Mount Etna
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
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Petrified Wood
Petrified Wood is a fossil that forms when dissolved material preciptates and replaces wood.
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Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
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Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
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Dowsing
Dowsing is a method used to find underground water that is rejected by most geologists.
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Salt Glaciers
Salt Glaciers are masses of salt that flow downslope under their own weight.
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Sand
Sand is a diverse material. This gallery includes photos of sand from around the world.
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Metals
Metals are important mineral products used in manufacturing and construction projects.
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Fire Opal
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
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Types Of Eruptions
Types of Volcanic Eruptions - A description of the most common eruption types.
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Geologic Time Scale
Divisions of Geologic Time - USGS time scale with unit names and age estimates.
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Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
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Ametrine
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
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USA Landslide Map
Landslide Incidence Map - A USGS map showing landslide incidence in the United States.
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Sunstone
Sunstone is a gem feldspar with aventurescence caused by light reflecting from platy inclusions.
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Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
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Scoria
Scoria is a dark-colored, extrusive igneous rock with abundant vesicles.
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Garnet
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
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Chatoyant Gems
Chatoyant Gems look like the eye of a cat. They have a line of light that moves across the stone.
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Methane Hydrate
Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.
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Hydraulic Fracturing
Hydraulic Fracturing - Increases well yield by fracturing the reservoir rock with fluid injection.
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Frac Sand
Frac Sand - The amount of frac sand produced in the USA is up by over 300% since 2009.
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Dangerous Mines
Abandoned Mine Accidents kill 20 to 30 per year. Many can be prevented with education.
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Oil Sands
Oil Sands contain oil in the form of bitumen. A major oil resource that can be difficult to produce.
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Largest Desert
Largest Desert - The Sahara is huge but two polar deserts are larger.
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Coal Close Up
Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.
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The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
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Earthquake Maps
California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
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Tallest Mountain
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
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What is a Geyser?
Photos of Geysers from around the world with information about height, eruption interval, more.
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Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
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Olivine
Olivine is a rock-forming mineral found in the crust, the mantle, and in some meteorites.
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Marble
Marble - The rock that forms from the metamorphism of limestone and has a diversity of uses.
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Rocks on Mars
Rocks on Mars - Many of the rocks found on Mars are not very different from Earth rocks.
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Eagle Ford Shale
Eagle Ford Shale - One of the most prolific producers of oil and gas in the United States.
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Dallol Volcano
Strange Volcanic Landscape! Photos of Dallol Volcano - an explosion crater in Ethiopia.
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Salt Domes
Salt Domes - Columns of salt that move upwards because of their low specific gravity.
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