Geology and Earth Science News and Information

Geology Dictionary - contains thousands of geological terms with their definitions.

Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.

Debris Flows are moving masses of loose mud, sand, soil, rock and water.

Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.

Minerals - Descriptions, photos, articles, properties and uses for common minerals.

Geology.com News contains news about geology and earth science from around the world.

Hardness Picks - Mohs hardness testing with precise and easy-to-use hardness picks.

How Are Hurricanes Named? There is a plan for naming tropical storms.

The Many Uses of Gold - Unique properties make gold one of the most useful metals.

Wall Maps - Wall maps of the world, continents, states and the USA.

Ethiopian Opal - The new opal heavyweight that might give Australia a run.

Storm Surge can be the most damaging and deadly aspect of a hurricane.

Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!

Helium is a byproduct of the natural gas industry. Its most important use is in MRI.

Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.

Spectacular Diamonds have an exceptional size, color, clarity, crystal form or other property.

Kilauea Eruption - photos of the 2018 eruption in the East Rift Zone of Kilauea Volcano.

100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.

Crater of Diamonds - The only diamond mine in the world where you can be the miner.

Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.

Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.

Free Google Earth software allows you to browse seamless world satellite images. Free.

The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.

What Is Earth Science? The study of Earth and its neighbors in space. Learn more!

What are Glaciers? Learn how glaciers form, flow, advance, retreat, and change over time.

Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.

Know the Rules before removing rocks, fossils or minerals from public or private property.

Homeowners Insurance might not cover the types of damage that you think it should.

Geology Tools Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.

Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.

Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.

Gemstones - Colorful images and articles about diamonds and colored stones.

United States Gemstones Small mines in the U.S. produce a diversity of gemstones.

What is Geology? The study of Earth materials, structures, processes and life over time.

Geodes look like ordinary rocks on the outside but can be spectacular inside!

Meteorites - Rocks that were once parts of planets or large asteroids.

Geology Books - A variety of books for reference, field trips, reading and more.

Sunstone - A gem feldspar with aventurescence caused by light reflecting from platy inclusions.

Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.

Green Diamonds - one of rarest and most valuable diamond colors.

Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.

Types of Volcanic Eruptions - A description of the most common eruption types.

Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.

Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.

Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?

Teacher Resources - K-12 resources for teaching about earth science.

June 6, 1912 - The most powerful volcanic eruption of the 20th century.

Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.

The East Africa Rift System - The extensive fault system that is tearing Africa apart.

Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.

Granite - The intrusive igneous rock that underlies continents and countertops.

Rock Art - People have been marking on rocks for thousands of years.

Azurite Granite ? A white granite with blue orbs of azurite. A new material from Pakistan.

Emerald is the most popular green gemstone in the United States and most of the world.

Dowsing is a method used to find underground water that is rejected by most geologists.

How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.

Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.

Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.

Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.

Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.

What is a Geyser? Photos and information about geysers in many parts of the world.

Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.

Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.

What is LNG? The use of LNG as an energy source is growing rapidly. Learn more about LNG.

Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.

Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?

The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.

Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.

Field Courses - Over 80 field courses for undergraduate geology students.

Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.

World Record Lightning - this lake has more lightning than any other place in the world.

Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.

Diamond Misconception - Many people think that diamonds form from coal. Not True!

Pavlof Volcano - one of the most active volcanoes in North America and a threat to air traffic.

Moldavite is a gem material born about 15 million years ago when a pair of asteroids struck Europe.

Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.

Variscite is a yellowish green to bluish green mineral. It is similar to turquoise and cut as a gem.

Facts About Copper - Information about copper uses, production, resources and more.

Steamboat Geyser - The world*s tallest geyser has erupted three times this year.

The Next Hawaiian Island could be growing in the Pacific Ocean right now. Its name is Lo'ihi.

Extraterrestrial Gems - A number of materials from space are used as attractive gems.

Canadian Diamond Mines produce some of the largest and highest quality diamonds!

What is a Maar? The second most common volcanic landscape feature on Earth.

Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.

Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.

Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.

Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.

Rock-Forming Minerals - most of Earth*s crust is made-up of a small number of minerals.

Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.

California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.

Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.

Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!

Range of Bear Species - Where you might encounter different types of bears.

Rhodonite - a manganese silicate used as a minor ore of manganese and as a gemstone.

Ilmenite - The primary ore of titanium and source of most titanium dioxide.

Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.

Turquoise - A bluish-green gem material that has been used for over 6000 years.

Sand is a diverse material. This gallery includes photos of sand from around the world.

Abandoned Mine Accidents kill several people every year. Education can prevent deaths.

Zircon is the primary ore of zirconium and a gemstone that is available in many colors.

What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.

Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.

Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.

Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.

Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.

Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.

Kyanite is a metamorphic mineral used to make porcelain, abrasive products and gems.

Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.

Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.

Pele*s Hair and Pele*s Tears are two unusual types of lava found at Kilauea and other volcanoes.

Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.

Utica Shale is confirmed as a major source of oil, natural gas and natural gas liquids.

Landslides A USGS fact sheet about landslides and events that trigger them.

Oil Fields from Space - Night views of Earth show the distribution of oil field activity.

US Diamond Mines - Did you know that diamonds have been mined in the United States?

Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.

Arctic Ocean Seafloor Map - The ridges, basins, shelves and rifts defining the Arctic seafloor.

Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.

Crushed Stone - About four tons per person is used each year in the United States.

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.

Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.

Tourmaline - an extremely colorful mineral and gem material.

Eagle Ford Shale - One of the most prolific oil and gas producers in the United States.

The Richest Meteorite Field - More meteorites found here than anywhere else on Earth.

Shale - The rock that has quickly transformed the oil and gas industry.

Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.

Horizontal Drilling has opened new resources and significantly improved productivity.

Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.

Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.

Chalcopyrite - The most important ore of copper for over five thousand years.

Diamond Production leaders include: Botswana, Russia, Angola and Canada.

The Uses of Marble are numerous and diverse. You will be surprised by how it is used.

Salt Domes - Salt structures that are often associated with oil and natural gas accumulations.

Mineral Rights - Who owns the minerals under your land? Who wants to buy them?

Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.

Fossils - Learn about fossils and discoveries around the world.

Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.

Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.

Hydraulic Fracturing increases well yield by fracturing the reservoir rock with fluid injection.

Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.

Frac Sand - A specialty sand used to maintain porosity in hydraulic fracturing.

Hematite - The most important ore of iron. A source of mineral pigment since prehistory.

Pictures of Opal - A collection of different types of opal from all around the world and Mars too!

Oil and Gas - Articles about oil and natural gas in the US and around the world.