Geology and Earth Science News and Information
Oil and Gas
Hawaii Topo Maps
Hawaii Delorme Atlas - Get detailed topo maps in the new Second Edition (2023).
The Brewery Rock ?
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
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?
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Solar System Volcanoes - Earth is not the only location of volcanic activity.
Geology News including: Earth science, mining, gemology, maps, metals, archaeology, and more.
Coquina - A porous limestone composed almost entirely of fossil debris.
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
What is Geology?
What is Geology? The study of Earth materials, structures, processes and life over time.
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.
Teacher Resources - K-12 resources for teaching about earth science.
13 Gemmy Facts About Spinel - Is spinel the world*s most overlooked gem?
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Sand Photo Collection
Sand from Around the World . A photo gallery showing the diversity of the material we call "sand".
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
World Record Lightning - this lake has more lightning than any other place in the world.
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
June 6th 1912
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
What Is The Moho?
What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.
Greatest Ocean Depth
Deepest Point in the Ocean The deepest point in the ocean is in the Mariana Trench.
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
Great Lakes : Map of the Great Lakes with surrounding states and provinces.
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
How Are Hurricanes Named? There is a plan for naming tropical storms.
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
Geology Books - A variety of books for reference, field trips, reading and more.
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
Wall Maps - Wall maps of the world, continents, states and the USA.
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Range of Bear Species - Where you might encounter different types of bears.
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Dig for Gems at dozens of sites across the United States. Keep what you find at most locations.
Meteorites - Rocks that were once parts of planets or large asteroids.
Fossils are remains, traces or imprints of ancient life. They reveal Earth's biological history.
Strawberry Quartz is a red to pink quartz with inclusions that look like strawberry seeds.
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Granite - The intrusive igneous rock that underlies continents and countertops.
Uses of Gold
The Many Uses of Gold - Unique properties make gold one of the most useful metals.
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Diamond Misconception - Many people think that diamonds form from coal. Not True!
Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Great Rift Valley
The East Africa Rift System - The extensive fault system that is tearing Africa apart.
The British Isles
Names Used for Great Britain, British Isles, United Kingdom, and Ireland. What they mean.
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Gems from Space
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Darvaza Gas Crater
The Doorway to Hell is a flaming sinkhole seeping natural gas that has been burning for decades.
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
World*s Largest Diamonds Records for the largest rough, faceted and carbonado diamond.
Chalcopyrite - The most important ore of copper for over five thousand years.
Horizontal Drilling has opened new resources and significantly improved productivity.
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Copper is a metal used in coins, electronics, pipes, wiring, motors, alloys and many other products.
Rock Art - People have been marking on rocks for thousands of years.
Shale - The rock that has quickly transformed the oil and gas industry.
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
San Andreas Fault
What is the San Andreas Fault? Map, photos and description of the fault.
Don*t Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Emerald is the most popular green gemstone in the United States and most of the world.
Fireworks & Minerals
The Science of Fireworks Learn how the colors and shapes are created.
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
Tourmaline - an extremely colorful mineral and gem material.
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Gemstones - Colorful images and articles about diamonds and colored stones.
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Cinder Cones are the smallest, simplest, and most common type of volcano.
Green River Fossils
The Green River Formation is one of the most famous rock units in the world for its fossils.
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
The Unsung Mineral Hero - and the commodity upon which almost everything is built.
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Types Of Eruptions
Types of Volcanic Eruptions - A description of the most common eruption types.
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Coal Close Up
Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.
Hawaiian Hot Spot
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Life on Europa?
Life on Europa (a moon of Jupiter) could exist in a salty ocean below its frozen surface.
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Lab-Grown Diamonds? What are they? Can people really make diamonds? Are they real?
Pele's Hair and Pele's Tears are two unusual types of lava found at Kilauea and Mauna Loa.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Canadian Diamond Mines produce some of the largest and highest quality diamonds!
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
Field Courses - Over 80 field courses for undergraduate geology students.
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.
Andalusite is a metamorphic mineral and a strongly pleochroic gem material.
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Map of the Oceans
Map of the Oceans - showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
Storm Surge can be the most damaging and deadly aspect of a hurricane.
What is LNG?
What is LNG? Liquefied Natural Gas. The gas is condensed into a liquid for efficient transport.