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News and Information About Geology and Earth Science

Volcanic ExplosivityVolcanic Explosivity Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected. RhodoniteRhodonite Rhodonite - a manganese silicate used as a minor ore of manganese and as a gemstone. Identifying MeteoritesMeteorite Identification Meteorite Identification Step one in identifying a possible meteorite is the magnet test. Lapis LazuliLapis Lazuli Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
RocksRocks Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions. Geology.com NewsGeology News Geology.com News is updated several times each week. Read it here or receive email updates. Crushed StoneCrushed Stone Crushed Stone - About four tons per person is used each year in the United States. Bear AttacksBear Attacks Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Sea Level Rise MapsSea Level Rise Maps Sea Level Rise Maps - See what will be flooded as sea level rises. Fluorescent MineralsFluorescent Minerals Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light. MineralsMinerals Minerals - Descriptions, photos, articles, properties and uses for common minerals. Watch out for Ticks!ticks Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Limonitelimonite Limonite - an amorphous iron oxide. Used as an ore of iron and as a pigment since prehistory. Methane HydrateMethane Hydrate Methane Hydrate deposits contain more fuel value than all other fossil fuels combined. Homeowners InsuranceHomeowners Insurance Homeowners Insurance usually does not cover the most common geologic hazards. DiamondsDiamonds Diamonds - Learn about the properties of diamond, its many uses and diamond discoveries.
OpalsOpal Pictures of Opal - A collection of different types of opal from all around the world and Mars too! Dowsingdowsing Dowsing is a method used to find underground water that is rejected by most geologists. Find Minerals & GemsFee Mining Find Minerals and Gems - Dozens of sites where you can dig and keep what you find. GemstonesGemstones Gemstones - Colorful images and articles about diamonds and colored stones.
Plate TectonicsPlate Tectonics Plate Tectonics - Articles, maps, information about plate tectonics and the interior of Earth. Titan SubmarineTitan Submarine Exploring a Hydrocarbon Sea on Titan with a submarine is a potential NASA mission. The Brewery Rock ?diatomite The Rock Used to Make Beer - Geologists are beer experts and should know about this rock. Oil and GasOil and Gas Oil and Gas - Articles about oil and natural gas in the US and around the world.
Chatoyant GemsChatoyant Gems Chatoyant Gems look like the eye of a cat. A line of light moves across the surface of the stone. VolcanoesVolcanoes Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present. ObsidianObsidian Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass. Huge Diamond DepositPopigai Diamonds The Largest Diamond Deposit in the world could be under Popigai Crater in Russia.
Sliding RocksSliding Rocks Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley? Mineral HardnessMohs Hardness Test Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing. Asteroid Impact MapAsteroid Impact Map Asteroid Impact Map - Explore fifty of the most obvious asteroid impact craters on Earth. Geologist Toolsgeologist tools Geologist Tools - Visit our store for a large selection of field and laboratory tools.
100+ Gemstonescolored stones 100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure. AmmoliteAmmolite Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites. HematiteHematite on Mars Hematite - The most important ore of iron. A source of mineral pigment since prehistory. Gems from SpaceGems from Space Extraterrestrial Gems - A number of materials from space are used as attractive gems.
Land Below Sea LevelLand Below Sea Level Land Below Sea Level - Did you know that dozens of land locations are below sea level? EmeraldEmerald Emerald is the most popular green gemstone in the United States and most of the world. Google Earth - FreeDownload Google Earth Free Free Google Earth software allows you to browse seamless world satellite images. Free. SnowflakesHow Do Snowflakes Form? How Do Snowflakes Form? They start as tiny crystals and change as they fall to Earth.
ShaleShale Shale - The rock that has quickly transformed the oil and gas industry. Crater of DiamondsCrater of Diamonds Crater of Diamonds - The only diamond mine in the world where you can be the miner. FossilsFossils Fossils - Learn about fossils and discoveries around the world. TurquoiseTurquoise Turquoise - A bluish-green gem material that has been used for over 6000 years.
LabradoriteLabradorite Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-colors Rock GlaciersRock Glaciers Rock Glaciers - Masses of rock, ice, snow, mud and water that slowly flow down slope. Teacher ResourcesTeacher Resources Teacher Resources - K-12 resources for teaching about earth science. San Andreas FaultSan Andreas Fault The San Andreas Fault - A feature that separates the Pacific and North American Plates.
GraniteGranite Granite - The intrusive igneous rock that underlies continents and countertops. Petrified WoodPetrified Wood Petrified Wood is a fossil that forms when dissolved material preciptates and replaces wood. What is Geology?What is Geology? What is Geology? - The study of Earth materials, structures, processes and life over time. Tallest TsunamiTallest Tsunami Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
MisconceptionDiamonds from Coal Diamond Misconception - Lots of people think that diamonds form from coal. Not True! Ruby and Sapphireruby and sapphire Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States. Geologic Time ScaleGeologic Time Scale Divisions of Geologic Time - USGS time scale with unit names and age estimates. US Diamond MinesUS Diamond Mines US Diamond Mines - Did you know that diamonds have been found in the United States?
What Is The Moho?What Is The Moho? What Is The Moho? Learn about the Mohorovicic Discontinuity - the mantle/crust boundary. MeteoritesMeteorites Meteorites - Rocks that were once parts of planets or large asteroids. Rare Earth ElementsRare Earth Elements Rare Earths - Special materials used in electronics, defense, medical & many other products. BasaltBasalt Basalt - Most of the ocean basin and part of the continents are underlain by basalt.
AstronomyAstronomy Astronomy - Fantastic images and articles about solar system and deep-space astronomy. Cave of the HandsCave of the Hands Cave of the Hands is a cave where ancient people painted hands about 9000 years ago. CorundumCorundum Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire. USA Landslide MapLandslides Landslide Incidence Map - A USGS map showing landslide incidence in the United States.
Largest EarthquakeLargest Earthquake Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960. PeridotiteKimberlite The Host Rock of Diamonds - Diamonds are found in Kimberlite, a variety of peridotite. Salt DomesSalt Domes Salt Domes - Columns of salt that move upwards because of their low specific gravity. Horizontal DrillingHorizontal Drilling Horizontal Drilling has opened new resources and significantly improved productivity.
Great Rift ValleyGreat Rift Valley The East Africa Rift System - The extensive fault system that is tearing Africa apart. What Is Earth Science?What Is Earth Science? What Is Earth Science? The study of Earth and its neighbors in space. Learn more! Volcanoes in SpaceExtraterrestrial Volcanoes Extraterrestrial Volcanoes - Earth is not the only solar system body with volcanoes. Largest DesertLargest Desert Largest Desert - The Sahara is huge but two polar deserts are larger.
Uses of GoldUses of Gold The Many Uses of Gold - Unique properties make gold one of the most useful metals. GarnetGarnet Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses. MineraloidsMineraloids Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity. AmetrineAmetrine Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
SandSand Sand is a diverse material. This gallery includes photos of sand from around the world. Tanzanitetanzanite Tanzanite was unknown until a few decades ago but it has erupted into wide popularity. Rock ArtRock Art Rock Art - People have been marking on rocks for thousands of years. SoapstoneSoapstone Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Facts About CopperCopper Facts About Copper - Information about copper uses, production, resources and more. The Acid TestThe Acid Test The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals. Oil SandsOil Sands Oil Sands contain oil in the form of bitumen. A major oil resource that can be difficult to produce. Largest VolcanoesLargest Volcanoes Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Tallest MountainTallest Mountain Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth. Types Of EruptionsTypes Of Eruptions Types of Volcanic Eruptions - A description of the most common eruption types. Coal Close UpCoal through a microscope 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 of Geysers from around the world with information about height, eruption interval, more.
Mount EtnaMount Etna Mount Etna - The most active volcano in Europe continues an eruption that started in 2001. What is LNG?What is LNG? What is LNG? The use of LNG as an energy source is growing rapidly. Learn more about LNG. Frac SandFrac Sand Frac Sand - The amount of frac sand produced in the USA is up by over 300% since 2009. Rocks on MarsRocks on Mars Rocks on Mars - Many of the rocks found on Mars are not very different from Earth rocks.
IoliteIolite Iolite is the gem variety of the mineral cordierite. An alternative to sapphire and tanzanite. SunstoneSunstone Sunstone is a gem feldspar with aventurescence caused by light reflecting from platy inclusions. Pavlof VolcanoPavlof Volcano Pavlof Volcano is one of the most active volcanoes in North America and a threat to air traffic. Uses of MarbleUses of Marble The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Cell Phone PhotosTake Great Cell Phone Photos Take Great Cell Phone Photos - Low-cost, easy-to-use lenses will improve your photos. Hydraulic FracturingHydraulic Fracturing Hydraulic Fracturing - Increases well yield by fracturing the reservoir rock with fluid injection. Mount VesuviusMount Vesuvius Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions. MetalsMetals Metals are important mineral products used in manufacturing and construction projects.
       

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