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Latest Crust Stories

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2008-05-14 10:00:41

Scientists from Durham University will use robots to explore the depths of the Atlantic Ocean to study the growth of underwater volcanoes that build the Earth's crust.The Durham experts will lead an international team of 12 scientists aboard Britain's Royal Research Ship James Cook which will set sail from Ponta Delgada, San Miguel, in the Azores on Friday, May 23.During the five-week expedition they will use explorer robots to map individual volcanoes on the Mid-Atlantic Ridge tectonic plate...

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2008-05-13 10:35:00

A new study of possible links between climate and geophysics on Earth and similar planets finds that prolonged heating of the atmosphere can shut down plate tectonics and cause a planet's crust to become locked in place."The heat required goes far beyond anything we expect from human-induced climate change, but things like volcanic activity and changes in the sun's luminosity could lead to this level of heating," said lead author Adrian Lenardic, associate professor of Earth science at Rice...

2008-05-06 17:28:49

You know Earth's schematic: core, mantle, crust, right? Sorry, not so simple. Like the gooey center of a chocolate morsel harboring peanut butter and honey, inner Earth is far more nuanced than outward appearances would suggest. A new model is proposed in the May 2 issue of the journal Science. Earth is made up of several layers, once thought to be pretty distinct. The skin, or crust, goes down about 25 miles (40 km). Below that is the mantle area, which extends about...

cc9e2d6bed1a481d55f8e5f79abec256
2008-05-01 13:25:59

The Earth's crust is, on global average around 40 kilometers deep. In relation to the total diameter of the Earth with approx. 12800 kilometers this appears to be rather shallow, but precisely these upper kilometers of the crust, the human habitat, is of special interest for us. Europe's crust shows an astonishing diversity: for example the crust under Finland is as deep as one only expects for crust under a mountain range such as the Alps. It is also amazing that the crust under Iceland and...

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2008-05-01 12:30:00

TALLAHASSEE, Fla. -- Working with colleagues from NASA, a Florida State University researcher has published a paper that calls into question three decades of conventional wisdom regarding some of the physical processes that helped shape the Earth as we know it today. Munir Humayun, an associate professor in FSU's Department of Geological Sciences and a researcher at the National High Magnetic Field Laboratory, co-authored a paper, "Partitioning of Palladium at High Pressures and Temperatures...

3084e64afc14493d22db339797ba6d101
2008-04-11 08:35:00

Uncovering a rare, two-billion-year-old window into the Earth's mantle, a University of Houston professor and his team have found our planet's geological history is more complex than previously thought. Jonathan Snow, assistant professor of geosciences at UH, led a team of researchers in a North Pole expedition, resulting in a discovery that could shed new light on the mantle, the vast layer that lies beneath the planet's outer crust. These findings are described in a paper titled "Ancient,...

5976f9a2e3e0d4108719c7b60ee84acb
2008-04-01 16:20:00

Study measures effects of chemical weathering on the composition of continentsNew research suggests that the geological staying power of continents comes partly from their losing battle with the Earth's oceans over magnesium. The research finds continents lose more than 20 percent of their initial mass via chemical reactions involving the Earth's crust, water and atmosphere. Because much of the lost mass is dominated by magnesium and calcium, continents ultimately gain because the lighter,...

a2bb0a36498559697e02b91749bc0d7f1
2008-03-17 15:00:00

Patterns of scalloped-edged cliffs or lobate scarps on Mercury's surface are thrust faults that are consistent with the planet shrinking and cooling with time. However, compression occurred in the planet's early history and Mariner 10 images revealed decades ago that lobate scarps are among the youngest' features on Mercury. Why don't we find more evidence of older compressive features?Scott D. King, professor of geosciences at Virginia Tech, reports in Nature Geoscience this week that mantle...

2008-03-05 14:26:56

Earth scientists are in the business of backing into history -- extrapolating what happened millions of years ago based on what they can observe now. Using this method, a team of Cornell researchers has created a mathematical computer model of the formation of granulite, a fine-grained metamorphic rock, in the Earth's crust. By studying what were once pockets of hot, melted rock 13 kilometers (about 8 miles) deep in the Earth's crust 55 million years ago and calculating the period of...

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2008-02-21 13:43:35

The first direct evidence of how and when tectonic plates move into the deepest reaches of the Earth is published in Nature today. Scientists hope their description of how plates collide with one sliding below the other into the rocky mantle could potentially improve their ability to assess earthquake risks. The UK and Swiss team found that, contrary to common scientific predictions, dense plates tend to be held in the upper mantle, while younger and lighter plates sink more readily into the...


Latest Crust Reference Libraries

4_33609f8ebef994f54be143abe0bef9f42
2004-10-19 04:45:40

Earth -- in geology and astronomy, fifth largest planet of the solar system and the only planet definitely known to support life. Gravitational forces have molded the earth, like all celestial bodies, into a spherical shape. However, the earth is not an exact sphere, being slightly flattened at the poles and bulging at the equator. The equatorial diameter is c.7,926 mi (12,760 km) and the polar diameter 7,900 mi (12,720 km); the circumference at the equator is c.24,830 mi (40,000 km)....

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Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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