| Land Below Sea Level |
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| Who Is Below Sea Level? Dozens of land areas are below current sea level. Explore them with a Google map. |
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What are Meteorites? Join meteorite hunter, Geoffrey Notkin, as he begins a series of monthly articles on the topic of meteorites. |
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Marcellus Shale: The most overlooked resource in the eastern United States! |
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Herkimer Diamonds: Learn how to find these doubly terminated quartz crystals at Herkimer, NY. |
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What is a Geyser? Photos of geysers from around the world. What causes them, how often do they erupt, how high, conditions that produce them, eruption statistics and lots more. |
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Two-Minute Survey: Please help us and our advertisers understand Geology.com visitors. No information that identifies you is requested. |
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| Impactites |
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| Impactites: A new article titled: "Impactites - Ghostly Footprints of Ancient Meteorites" by Geoffrey Notkin of Aerolite Meteorites. Learn about impact breccia, Libyan desert glass, moldavites, and shatter cones and more. |
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| Newest Articles & Content |
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Mount Vesuvius: An interesting article with photos and maps that describes the volcano's eruption history, geologic hazards, plate tectonics and more. By Jessica Ball. |
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Concealed Glaciers on Mars: They are covered by a layer of rocky debris that has now been penetrated by radar. Article by the University of Texas at Austin. |
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Identifying Meteorites: Geoffrey Notkin explains how to identify meteorites and tells you about meteor-wrongs. |
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Natural Gas Shales: An explosion of natural gas leasing and drilling activity is happening across the United States. This summary page features several gas plays. |
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Largest Impact Crater: NASA scientists have discovered evidence for what they believe is the largest impact crater in the solar system - on Mars. |
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Volcanoes! A page that links to all of our volcano articles and to the best volcano information that we could find. |
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Water on Mars: NASA scientists say that they have "touched and tasted" water on Mars. |
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Eruptions at Okmok Caldera: warning levels have recently been to RED. Seismicity, ash plumes, steam, and heavy sulfur dioxide emissions have been seen. |
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Chaitén Volcano Erupts:
Videos, pictures, maps, news, satellite images and facts for this volcano in southeastern Chile that is erupting for the first time in about 9000 years. |
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Geology of Mercury: New data from NASA reveals Mercury's volcanoes, impact craters, core, magnetic field and crustal processes. |
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The Tunguska Blast: One hundred years ago a meteoroid exploded above the surface of Siberia. A new look at this famous event. |
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Fayetteville Shale: Another huge natural gas field is discovered in northern Arkansas. Some think it might be 4th largest in the world. |
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Haynesville Shale: News, videos & information for this new shale gas resource in northern Louisiana and adjacent states. |
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"A Grain of Sand": A gallery of sand grains from around the world as photographed through a microscope by Dr. Gary Greenberg. |
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Volcanic Ash:The recent eruption of Chaitén blanketed large areas of Chile and Argentina with ash. |
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Bakken Formation Oil: A USGS assessment finds lots of undiscovered oil resources in Montana and North Dakota. |
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Daily news for geology and earth science. Delivered to you free by RSS or email. |
| Kids Science Books |
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| Earth Science Books For Kids: We just added 28 earth science books for students to our store. Rock, mineral, fossil and dinosaur books for ages 8 through 18. A great gift. |
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Geology Dictionary:
Look up definitions in our free geology dictionary. Hundreds of geology term definitions at your fingertips. |
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The Many Uses of Gold: Learn how the unique properties of gold make it extremely suited for a large number of industrial uses. |
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Uses of Granite: The rock used for everything from kitchen counters to street curbing to the facing stone of skyscrapers. |
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Homeowners Insurance: The typical homeowners policy does't cover natural hazards. It is simply a fire and liability policy. |
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Expansive Soil: Causes more damage than earthquakes, floods, hurricanes & tornadoes combined. |
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