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What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
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Gold Pans
Gold Pans and Panning Kits - classifiers, snuffer bottles. Pans sized for kids to Goliath.
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June 6, 1912
June 6, 1912 - The most powerful volcanic eruption of the 20th century.
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Gems from Space
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
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Rock Tumblers
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
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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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What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
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Rocks
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
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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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Coal Close Up
Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.
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Hardness Picks
Hardness Picks - Mohs hardness testing with precise and easy-to-use hardness picks.
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Gemstones
Gemstones - Colorful images and articles about diamonds and colored stones.
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Methane Hydrate
Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.
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Crushed Stone
Crushed Stone - About four tons per person is used each year in the United States.
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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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Hematite
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
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Rock Art
Rock Art - People have been marking on rocks for thousands of years.
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Azurite
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
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Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
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Hand Lens
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
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Ant Hill Garnets
Ant Hill Garnets are tiny garnets that ants haul to the surface and discard on their anthill. Honest!
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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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What are Glaciers?
What are Glaciers? Learn how glaciers form, flow, advance, retreat, and change over time.
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San Andreas Fault Map
Google Map of the San Andreas Fault Zoom in to see the fault trace on satellite images.
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Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
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Azurite Granite
Azurite Granite ? A white granite with blue orbs of azurite. A new material from Pakistan.
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Earthquake Maps
California Earthquake Maps A collection of isoseismal maps for earthquakes in California.
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Volcanic Explosivity
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
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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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World Record Lightning
World Record Lightning - Lake Maracaibo has more lightning than any other place in the world.
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Geology of Gems
Geology of Gems - The first comprehensive book on the geology of gem deposits.
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Canadian Diamonds
Canadian Diamond Mines produce some of the largest and highest quality gems!
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Tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
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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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Hydraulic Fracturing
Hydraulic Fracturing - Increases well yield by fracturing the reservoir rock with fluid injection.
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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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Sea Level Rise Maps
Sea Level Rise Maps - See what will be flooded as sea level rises.
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Geology Tools
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
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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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What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
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Turquoise
Turquoise - A bluish-green gem material that has been used for over 6000 years.
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Facts About Copper
Facts About Copper - Information about copper uses, production, resources and more.
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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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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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Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
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Lightning Strikes Map
Lightning Strikes Map - A NASA map showing the worldwide distribution of lightning activity.
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Abandoned Mines
Abandoned Mine accidents take 20 to 30 lives per year. Many can be prevented with education.
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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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Wall Maps
Wall Maps - Wall maps of the world, continents, states and the USA.
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Great Rift Valley
The East Africa Rift System - The extensive fault system that is tearing Africa apart.
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Mount Vesuvius
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
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Misconception
Diamond Misconception - Lots of people think that diamonds form from coal. Not True!
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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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Garnet
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
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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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Dowsing
Dowsing is a method used to find underground water that is rejected by most geologists.
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Blue Flames
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
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UV Mineral Lamp
Portable UV Lamp - short / long wave for fluorescent minerals. Safety glasses included.
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Quartzite
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
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Homeowners Insurance
Homeowners Insurance usually does not cover the most common geologic hazards.
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What Is The Moho?
What Is The Moho? Learn about the Mohorovicic Discontinuity - the mantle/crust boundary.
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Mount Cleveland
Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.
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USA Landslide Map
Landslide Incidence Map - A USGS map showing landslide incidence in the United States.
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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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Lapis Lazuli
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
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Chalcopyrite
Chalcopyrite - The most important ore of copper for over five thousand years.
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Sand
Sand is a diverse material. This gallery includes photos of sand from around the world.
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Sunstone
Sunstone is a gem feldspar with aventurescence caused by light reflecting from platy inclusions.
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Arctic Seafloor Map
Arctic Ocean Seafloor Map The ridges, basins, shelves and rifts defining the Arctic seafloor.
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Teacher Resources
Teacher Resources - K-12 resources for teaching about earth science.
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Gfeller Leather
Gfeller Leather field cases, hammer holsters, lanyards, field belts, acid bottle cases, more.
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Granite
Granite - The intrusive igneous rock that underlies continents and countertops.
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Meteorites
Meteorites - Rocks that were once parts of planets or large asteroids.
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Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
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Petrified Wood
Petrified Wood is a fossil that forms when dissolved material preciptates and replaces wood.
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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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Rock Kits
Rock Kits for classroom and personal study. A great way to learn about rocks.
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Bear Map
Range of Bear Species - Where you might encounter different types of bears.
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US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
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Rock Bags
Rock Bags - Durable field bags with pockets for carrying maps, books, specimens and tools.
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Labradorite
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-colors
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Mineral Hardness
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
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The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
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Expansive Soil
Expansive Soil Causes more damage than floods, hurricanes & tornadoes combined.
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Shale
Shale - The rock that has quickly transformed the oil and gas industry.
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Huge Diamond Deposit
The Largest Diamond Deposit in the world could be under Popigai Crater in Russia.
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Rock Glaciers
Rock Glaciers - Masses of rock, ice, snow, mud and water that slowly flow down slope.
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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 Geology?
What is Geology? - The study of Earth materials, structures, processes and life over time.
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Fluorescent Minerals
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
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Antarctic Meteorites
The Richest Meteorite Field - More meteorites found here than anywhere else on Earth.
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Gem Silica
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
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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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Rocks on Mars
Rocks on Mars - Many of the rocks found on Mars are not very different from Earth rocks.
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Types Of Eruptions
Types of Volcanic Eruptions - A description of the most common eruption types.
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Red Beryl
Red Beryl is one of the rarest gems. Small amounts are mined at one locality in Utah.
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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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Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
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Salt Domes
Salt Domes - Salt structures that are often associated with oil and natural gas.
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Mineraloids
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
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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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Rhodonite
Rhodonite - a manganese silicate used as a minor ore of manganese and as a gemstone.
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Olivine Rain?
Olivine Rain? Spitzer Telescope discovered a rain of olivine crystals on protostar HOPS-68.
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Mineral Rights
Mineral Rights Who owns the minerals under your land? Who wants to buy them?
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Rhyolite
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
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Chatoyant Gems
Chatoyant Gems look like the eye of a cat. A line of light moves across the surface of the stone.
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Horizontal Drilling
Horizontal Drilling has opened new resources and significantly improved productivity.
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Oil Fields from Space
Oil Fields from Space - Night views of Earth show the distribution of oil field activity.
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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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Minerals
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
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Fossils
Fossils - Learn about fossils and discoveries around the world.
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Plate Tectonics
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
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Volcanoes
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
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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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Diamonds
Diamonds - Learn about the properties of diamond, its many uses and diamond discoveries.
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Deepest Lake
Deepest Lake in the World Lake Baikal in southern Russia is the deepest lake in the World.
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Largest Earthquake
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
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Fee Mining Sites
Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.
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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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Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
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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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Ammolite
Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.
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