The Saidmarreh Landslide in Iran is 10,000 years old and involved 5 cubic miles of debris.
Pumice is a rock formed during explosive volcanic eruptions. It has a wide variety of uses.
||Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
||What is Peanut Wood?
Peanut Wood? It is a type of fossil wood found in Australia. Do you know how it forms?
Geology.com News is updated several times each week. Read it here or receive email updates.
Petrified Wood is a fossil that forms when dissolved material preciptates and replaces wood.
Rocks: Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Minerals: Descriptions, photos, articles, properties and uses for common minerals.
Bear Attacks: Knowing how to react to a bear encounter or attack could save your life.
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-colors
||What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
||Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Pavlof Volcano is one of the most active volcanoes in North America and a threat to air traffic.
Salt Glaciers are masses of salt that flow downslope under their own weight.
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Plate Tectonics: Articles, maps, information about plate tectonics and the interior of Earth.
Sunstone: a gem feldspar with aventurescence caused by light reflecting from platy inclusions.
||San Andreas Fault
The San Andreas Fault: A feature that separates the Pacific and North American Plates.
Salt Domes are columns of salt that move upwards because of the salt\'s low specific gravity.
Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.
Chromite is the only economic ore of chromium metal. It is usually found in ultrabasic rocks.
||USA Landslide Map
Landslide Incidence Map: A USGS map showing landslide incidence in the United States.
Gemstones: Fantastic images and articles about diamonds and colored stones.
Rock Art: People have been marking on rocks for thousands of years.
|Rocks on Mars
Rocks on Mars: Many of the rocks found on Mars are not very different from Earth rocks.
Volcanoes: Articles about volcanoes, volcanic hazards and eruptions past and present.
||Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
||Find Minerals & Gems
Find Minerals and Gems: Dozens of sites where you can dig and keep what you find.
Diamonds: Learn about the properties of diamond, its many uses and diamond discoveries.
||Oil and Gas
Oil and Gas: Articles about oil and natural gas in the US and around the world.
Fluorite is an industrial mineral used in many chemical, ceramic and metallurgical processes.
Largest Landslides: Heart Mountain and Storegga are the largest known landslides.
Sliding Rocks Mystery: What causes these rocks to slide across a playa in Death Valley?
||A Close Look at Coal
Coal Through a Microscope: Coal is more than a black rock. It is THE most interesting rock.
||Asteroid Impact Map
Asteroid Impact Map: Explore fifty of the most obvious asteroid impact craters on Earth.
Fluorescent Minerals glow with spectacular colors under ultraviolet light.
Historical Geology: Articles about the history of the Earth and the events that have shaped it.
Wrong Volcano! The most powerful eruption of the 20th century was misidentified?
Fossils: Learn about fossils and fossil discoveries around the world.
||Uses of Gold
The Many Uses of Gold: Unique properties make gold one of the most useful metals.
|What is LNG?
What is LNG? The use of Liquified Natural Gas as an energy source is growing rapidly.
Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.
Geologist Tools: Visit our store for a large selection of field and laboratory tools.
||Flaring from Space
Flaring from Space at Night: Views of Earth show oil field illumination and gas flaring.
Diamond Misconception: Lots of people think that diamonds form from coal. Not True!
||Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Earthquakes: Learn about earthquakes and how they have affected cities and people.
||Land Below Sea Level
Land Below Sea Level: Did you know that dozens of land locations are below sea level?
Astronomy: Fantastic images and articles about solar system and deep-space astronomy.
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
Strange Volcanic Landscape! Photos of Dallol Volcano - an explosion crater in Ethiopia.
Olivine is a rock-forming mineral found in Earth\'s crust and mantle, and in some meteorites.
Impact Events: Articles and images about impact events on Earth, moons and planets.
||Facts About Copper
Facts About Copper: Information about copper uses, production, resources and more.
||What City is This?
What City is This? Can you recognize United States cities from satellite images?
||Rare Earth Elements
Rare Earths: Special materials used in electronics, defense, medical & many other products.
|Earth Science Records
Earth Science Records: Highest mountain, deepest lake, biggest tsunami and more.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Water Articles, press releases and teaching resources for surface and ground water.
Climate Change: A collection of articles on climate change and it\\\'s diverse impacts.
Tsunamis: Articles and press releases about tsunamis and earthquakes that trigger them.
Mount Etna: The most active volcano in Europe continues an eruption that started in 2001.
Chrysoberyl: a very hard gem mineral with dispersion, chatoyance and color-change.
Largest Volcano: That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Oceanography: Articles, press releases and teaching materials related to oceanography.
||Eagle Ford Shale
Eagle Ford Shale: One of the most prolific producers of oil and gas in the United States.
Subsidence: Articles, maps and news about mine, cavern and fluid-production subsidence.
Frac Sand: The amount of frac sand produced in the USA is up by over 300% since 2009.
Homeowners Insurance usually does not cover the most common geologic hazards.
Sand is a diverse material. This gallery includes photos of sand from around the world.
Volcanic Explosivity: Rating volcanic eruptions based upon the volume of tephra ejected.
Scoria is a dark-colored, extrusive igneous rock with abundant vesicles.
|The Acid Test
The Acid Test: Geologists use dilute hydrochloric acid to identify carbonate minerals.
Hydraulic Fracturing: Increases well yield by fracturing the reservoir rock with fluid injection.
Horizontal Drilling has opened new resources and significantly improved productivity.
Turritella Agate is a brown agate containing snail fossils from the Green River Formation.