Geology and Earth Science News and Information


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Diamonds
Earthquakes
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Rocks
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Teacher Resources
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Rhyolite
Rhyolite
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
Rocks on Mars
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Rocks
Rocks
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Gifts That Rock
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Google Earth - Free
Download Google Earth Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Cave of the Hands
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Green River Fossils
Green River Fossils
The Green River Formation is one of the most famous rock units in the world for its fossils.
Plate Tectonics
Plate Tectonics
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
Chalcopyrite
Chalcopyrite
Chalcopyrite - The most important ore of copper for over five thousand years.
Ilmenite
Ilmenite
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Gemstones
Gemstones
Gemstones - Colorful images and articles about diamonds and colored stones.
Meteorites
Meteorites
Meteorites - Rocks that were once parts of planets or large asteroids.
Diamonds
Diamonds
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Types Of Eruptions
Types Of Eruptions
Types of Volcanic Eruptions - A description of the most common eruption types.
The Brewery Rock ?
diatomite
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
Rock and Mineral Kits
Rock Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Quartzite
quartzite
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
Fire Opal
Fire Opal
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Copper
Copper
Copper is a metal used in coins, electronics, pipes, wiring, motors, alloys and many other products.
Volcanoes
Volcanoes
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
Spatter Cones
Spatter Cones
Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.
Debris Flows
Debris Flows
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Uses of Marble
Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Andalusite
Andalusite
Andalusite is a metamorphic mineral and a strongly pleochroic gem material.
Crater of Diamonds
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Rare Earth Elements
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Gems from Space
Gems from Space
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
Minerals
Minerals
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Obsidian
Obsidian
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
Bear Attacks
Bear Attacks
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Hardness Picks
hardness picks
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Types of Maps
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
Canary Islands
Canary Islands
Where Are the Canary Islands? Off the northwest coast of Africa, 60 miles west of Morocco.
Helium
Helium
Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Wall Maps
Wall Maps
Wall Maps - Wall maps of the world, continents, states and the USA.
Mineral Luster
luster
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Fool*s Gold
Fool*s Gold
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Pyroxene Minerals
Pyroxene Minerals
Pyroxene Minerals are a group of chain silicate minerals found in igneous and metamorphic rocks.
Phytoplankton Blooms
Phytoplankton Blooms
Phytoplankton Blooms are caused by an explosive growth rate of plankton in surface waters.
Crystal Habit
Crystal Habit
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Sand
Sand
Sand is a diverse material. This gallery includes photos of sand from around the world.
Mineral Hardness
Mohs Hardness Test
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Opals
Opal
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Zircon
Zircon
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Ruby and Sapphire
ruby and sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Blue Flames
Blue Flames
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Largest Hurricanes
Largest Hurricanes
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Map of the Oceans
Map of the Oceans
Map of the Oceans - showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
Granite
Granite
Granite - The intrusive igneous rock that underlies continents and countertops.
Teacher Resources
Teacher Resources
Teacher Resources - K-12 resources for teaching about earth science.
Rock Tumblers
Rock Tumblers
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Cinnabar
Cinnabar
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Record Lightning
Lake Maracaibo Lightning
World Record Lightning - this lake has more lightning than any other place in the world.
Birthstones
Birthstones
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Tallest Tsunami
Tallest Tsunami
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
San Andreas Fault
What is the San Andreas Fault?
What is the San Andreas Fault? Map, photos and description of the fault.
Hand Lens
Hand Lens
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Mineraloids
Mineraloids
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
The Acid Test
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Coquina
Coquina
Coquina - A porous limestone composed almost entirely of fossil debris.
Largest Earthquake
Largest Earthquake
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
Labradorite
Labradorite
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Colored Diamonds
Colored Diamonds
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Volcanic Explosivity
Volcanic Explosivity
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
DeLorme Atlas
DeLorme Atlas
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Geology Tools
Geology Tools
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Ethiopian Opal
Ethiopian opal
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
UV Mineral Lamp
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Lapis Lazuli
Lapis Lazuli
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
E.T. Volcanoes
Solar System Volcanoes
Solar System Volcanoes - Earth is not the only location of volcanic activity.
Fluorescent Minerals
Fluorescent Minerals
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Geology Books
Geology Books
Geology Books - A variety of books for reference, field trips, reading and more.
June 6th 1912
Novarupta
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
Field Courses
Field Camps
Field Courses - Over 80 field courses for undergraduate geology students.
Utica Shale
Utica Shale
Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
Mount Etna
Mount Etna
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
Gold Pans
Gold Pans
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.
What is Geology?
What is Geology?
What is Geology? The study of Earth materials, structures, processes and life over time.
Rhodochrosite
Rhodochrosite
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
Sliding Rocks
Sliding Rocks
Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
Soapstone
Soapstone
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Hematite
Hematite on Mars
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
Spinel
Spinel
10 Gemmy Facts About Spinel - Is spinel the world*s most overlooked gem?
Mars Meteorites
Mars Meteorites
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
Emerald
Emerald
Emerald is the most popular green gemstone in the United States and most of the world.
Shale
Shale
Shale - The rock that has quickly transformed the oil and gas industry.
Lightning Strikes Map
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Rock Art
Rock Art
Rock Art - People have been marking on rocks for thousands of years.
Corundum
Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Don*t Go To Jail
Don't Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Tallest Mountain
Tallest Mountain
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
Watch out for Ticks!
Ticks
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Storm Surge
Storm Surge
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Morganite
Morganite
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Olivine
Olivine
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
US Diamond Mines
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Fireworks & Minerals
Minerals and Fireworks
The Science of Fireworks Learn how the colors and shapes are created.
American Gemstones
U.S. Gemstones
Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.
Bear Map
Bear Map
Range of Bear Species - Where you might encounter different types of bears.
Citrine
Citrine
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
Rock Salt
Rock Salt
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Expansive Soil
Expansive Soil
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
Waterproof Paper
Waterproof Paper
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Gem Silica
Gem Silica
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Underwater Volcano
Lo'ihi Seamount
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
Petrified Wood
Petrified Wood
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
100+ Gemstones
colored stones
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
What Is Earth Science?
What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
Misconception
Diamonds from Coal
Diamond Misconception - Many people think that diamonds form from coal. Not True!
Tallest Waterfall
Tallest Waterfall
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
Mineral Rights
Mineral Rights
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Coal Close Up
Coal Through a Microscope
Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.
Great Rift Valley
Great Rift Valley
The East Africa Rift System - The extensive fault system that is tearing Africa apart.
Uses of Gold
Uses of Gold
The Many Uses of Gold - Unique properties make gold one of the most useful metals.
What is a Geyser?
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Ant Hill Garnets
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Grape Agate
Grape Agate
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Turquoise
Turquoise
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Uses of Talc
uses of talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
What Is The Moho?
What Is The Moho?
What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.
The British Isles
British Isles
Names Used for Great Britain, British Isles, United Kingdom, and Ireland. What they mean.
Largest Diamonds
world's largest diamonds
World*s Largest Diamonds Records for the largest rough, faceted and carbonado diamond.
Azurite
Azurite
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Hurricane Names
Hurricane Names
How Are Hurricanes Named? There is a plan for naming tropical storms.
Hawaiian Hot Spot
Hawaiian Hot Spot
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
Tourmaline
Tourmaline
Tourmaline - an extremely colorful mineral and gem material.
Geodes
Geodes
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Peridotite
Peridotite
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
What is a Maar?
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Earthquake Maps
California Earthquake Maps
California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
Charoite
Charoite
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
Herkimer Diamonds
Herkimer Diamonds
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Crushed Stone
Crushed Stone
The Unsung Mineral Hero - and the commodity upon which almost everything is built.
Homeowners Insurance
Homeowners Insurance
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Largest Volcanoes
Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Tanzanite
tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Mount Vesuvius
Mount Vesuvius
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
Greatest Ocean Depth
Deepest Point in the Ocean
Deepest Point in the Ocean The deepest point in the ocean is in the Mariana Trench.
Cinder Cones
Cinder Cones
Cinder Cones are the smallest, simplest, and most common type of volcano.
Chalk
chalk
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.