Geology and Earth Science News and Information
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Gifts that Rock! Find something for the rockhound on your holiday shopping list.
Horizontal Drilling has opened new resources and significantly improved productivity.
Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Great Rift Valley
The East Africa Rift System - The extensive fault system that is tearing Africa apart.
Geology.com News contains news about geology and earth science from around the world.
Sand is a diverse material. This gallery includes photos of sand from around the world.
Sea Level Rise Maps
Sea Level Rise Maps - See what will be flooded as sea level rises.
San Andreas Fault Map
Google Map of the San Andreas Fault - Zoom in to see the fault trace on satellite images.
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Diamond Production leaders include: Botswana, Russia, Angola and Canada.
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Dowsing is a method used to find underground water that is rejected by most geologists.
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
Canada is one of the world*s leading producers of gem-quality diamonds.
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Rock Art - People have been marking on rocks for thousands of years.
Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.
Emerald is the most popular green gemstone in the United States and most of the world.
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Life on Europa?
Life on Europa could exist in a salty ocean deep below its frozen surface.
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Kyanite is a metamorphic mineral used to make porcelain, abrasive products and gems.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Gemstones - Colorful images and articles about diamonds and colored stones.
Meteorites - Rocks that were once parts of planets or large asteroids.
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Don*t Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
Tourmaline - an extremely colorful mineral and gem material.
Facts About Copper
Facts About Copper - Information about copper uses, production, resources and more.
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Land Below Sea Level
Land Below Sea Level - Did you know that dozens of land locations are below sea level?
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Frac Sand - A specialty sand used to maintain porosity in hydraulic fracturing.
Homeowners Insurance usually does not cover the most common geologic hazards.
Yosemite Rock Fall - Photo sequence of a 2006 rockfall and debris avalanche by Herb Dunn.
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
What is Geology?
What is Geology? The study of Earth materials, structures, processes and life over time.
The Brewery Rock ?
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Chalcopyrite - The most important ore of copper for over five thousand years.
Diamond Misconception - Many people think that diamonds form from coal. Not True!
Granite - The intrusive igneous rock that underlies continents and countertops.
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
What Is The Moho?
What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Shale - The rock that has quickly transformed the oil and gas industry.
Field Courses - Over 80 field courses for undergraduate geology students.
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Asteroid Impact Map
Asteroid Impact Map - Explore fifty of the most obvious asteroid impact craters on Earth.
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Wall Maps - Wall maps of the world, continents, states and the USA.
Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.
Teacher Resources - K-12 resources for teaching about earth science.
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
Sunstone - A gem feldspar with aventurescence caused by light reflecting from platy inclusions.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
World Record Lightning - this lake has more lightning than any other place in the world.
What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Types Of Eruptions
Types of Volcanic Eruptions - A description of the most common eruption types.
Hardness Picks - Mohs hardness testing with precise and easy-to-use hardness picks.
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
Rhodonite - a manganese silicate used as a minor ore of manganese and as a gemstone.
How Are Hurricanes Named? There is a plan for naming tropical storms.
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Geology Tools Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
What is LNG?
What is LNG? The use of LNG as an energy source is growing rapidly. Learn more about LNG.
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Geology Books - A variety of books for reference, field trips, reading and more.
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Oil Fields from Space
Oil Fields from Space - Night views of Earth show the distribution of oil field activity.
Azurite Granite ? A white granite with blue orbs of azurite. A new material from Pakistan.
Gems from Space
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
June 6, 1912
June 6, 1912 - The most powerful volcanic eruption of the 20th century.
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Moldavite is a gem material born about 15 million years ago when a pair of asteroids struck Europe.
Hydraulic Fracturing increases well yield by fracturing the reservoir rock with fluid injection.
The Richest Meteorite Field - More meteorites found here than anywhere else on Earth.
Coal Close Up
Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.
Uses of Gold
The Many Uses of Gold - Unique properties make gold one of the most useful metals.
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
Utica Shale is confirmed as a major source of oil, natural gas and natural gas liquids.
Range of Bear Species - Where you might encounter different types of bears.
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Crushed Stone - About four tons per person is used each year in the United States.
What are Glaciers?
What are Glaciers? Learn how glaciers form, flow, advance, retreat, and change over time.
Pavlof Volcano - one of the most active volcanoes in North America and a threat to air traffic.
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Geology of Helium
Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Eagle Ford Shale
Eagle Ford Shale - One of the most prolific oil and gas producers in the United States.
Arctic Seafloor Map
Arctic Ocean Seafloor Map - The ridges, basins, shelves and rifts defining the Arctic seafloor.
Salt Domes - Salt structures that are often associated with oil and natural gas accumulations.
Oil and Gas
Oil and Gas - Articles about oil and natural gas in the US and around the world.
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Fossils - Learn about fossils and discoveries around the world.
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
Fee Mining Sites
Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.