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8f38d93927aca374b6d4e074788efe451
2009-07-31 08:55:00

A research program aimed at using platinum as an exploration guide for nickel has for the first time been able to put a time scale on the planet's large-scale convection processes.The research is reported in a Nature paper titled "Progressive mixing of meteoritic veneer into the early Earth's deep mantle".Report author CSIRO Minerals Down Under Flagship researcher Dr Stephen Barnes said the study group collected a large body of data on the platinum content of lava flows called komatiites,...

8f258e0d137df2a633f5c73322d8ffab1
2009-07-14 06:10:00

Venus Express has charted the first map of Venus's southern hemisphere at infrared wavelengths. The new map hints that our neighboring world may once have been more Earth-like, with both, a plate tectonics system and an ocean of water. The map comprises over a thousand individual images, recorded between May 2006 and December 2007. Because Venus is covered in clouds, normal cameras cannot see the surface, but Venus Express used a particular infrared wavelength that can see through them....

2009-06-22 11:50:00

The Earth's mantle, situated under the Earth's crust, is very much the spot for studying interesting geological processes. Although we do not realise it, right under our feet there is a sultry world of circulating Earth layers. We only come into contact with these hot Earth layers in the event of earthquakes and volcanic eruptions. It is therefore important to learn more about the characteristics of the Earth's mantle. These characteristics can be portrayed using seismic waves. However, the...

2009-06-18 08:29:58

For the first time scientists have discovered the presence of a natural deep earth pump that is a crucial element in the formation of ore deposits and earthquakes.The process, called creep cavitation, involves fluid being pumped through pores in deformed rock in mid-crustal sheer zones, which are approximately 15 km below the Earth's surface.The fluid transfer through the middle crust also plays a key role in tectonic plate movement and mantle degassing.The discovery was made by examining one...

2ec90e91bdd6b5e7b9ab18d3ea5ecfbc1
2009-06-15 14:40:00

UC Davis team calculates distribution of iron isotopes in Earth's mantle 4.5 billion years ago, opening door to new studies of planet's geologic historyBy using a super-computer to virtually squeeze and heat iron-bearing minerals under conditions that would have existed when the Earth crystallized from an ocean of magma to its solid form 4.5 billion years ago, two UC Davis geochemists have produced the first picture of how different isotopes of iron were initially distributed in the solid...

2009-06-08 09:29:41

For decades, geologists have been puzzled by the mechanisms that give rise to the kind of volcanoes that form the so-called "ring of fire" around the Pacific Ocean. These arc volcanoes, which account for about 10 to 25 percent of all volcanoes, are produced when one of the plates that make up Earth's crust plunges beneath another plate, a process called subduction.What was unclear was what factors controlled when, how and at what depth fluids and molten rock from these subducting plates are...

2009-06-01 08:18:00

California Raisin Category Winners Announced at the American Pie Council's Crisco National Pie Championships FRESNO, Calif., June 1 /PRNewswire/ -- The California Raisin Marketing Board (CRMB) is proud to announce the winners of the second annual California Raisin category in the amateur division at the 2009 Crisco(R) National Pie Championships, hosted by the American Pie Council (APC) last month in Celebration, Florida. To qualify, pies entered in the category needed to include at least...

2009-05-28 11:07:43

 A new analysis of the processes that constantly stir the Earth's deep mantle is helping to explain how the mantle holds onto a portion of ancient noble gases that were trapped during the Earth's formation.The research, which appears this week in the journal Nature, takes aim at a question that has vexed geoscientists for years: how to reconcile leading theories about the convection of Earth's mantle with observations of ancient noble gases in volcanic rocks. Researchers at Rice...

2009-05-27 15:56:08

Arizona State University researchers say they have discovered a large cylindrical blob of cold material far below the surface of central Nevada. Led by geologist John West, the scientists determined the blob was formed when portions of the lithosphere -- the Earth's crust and uppermost mantle -- had sunk into the more fluid upper mantle beneath the U.S. Western Great Basin. West said it was an extremely unexpected finding in a location that showed no corresponding changes in surface...

856c6c2a81f87c41a07aaa9ec3b685941
2009-05-26 15:30:00

There are very few places in the world where dynamic activity taking place beneath Earth's surface goes undetected. Volcanoes, earthquakes, and even the sudden uplifting or sinking of the ground are all visible results of restlessness far below, but according to research by Arizona State University (ASU) seismologists, dynamic activity deep beneath us isn't always expressed on the surface. The Great Basin in the western United States is a desert region largely devoid of major surface changes....


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
bodacious
  • Remarkable; prodigious.
  • Audacious; gutsy.
  • Completely; extremely.
  • Audaciously; boldly.
  • Impressively great in size; enormous; extraordinary.
This word is probably from the dialectal 'boldacious,' a blend of 'bold' and 'audacious.'
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