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Latest Structure of the Earth Stories

eca97d86d0613e4aa3f09e8f9e03ef4b1
2009-03-19 08:28:14

MU researchers found that strain heating can play an important role in crustal melting A University of Missouri study published in Nature this week has found that the Earth's crust melts easier than previously thought. In the study, researchers measured how well rocks conduct heat at different temperatures and found that as rocks get hotter in the Earth's crust, they become better insulators and poorer conductors. This finding provides insight into how magmas are formed and will lead to...

2009-03-18 14:39:08

NASA says it has produced a unique movie about Earth's changing ice and snow cover to be shown at U.S. science centers and museums. The National Aeronautics and Space Administration says the Goddard Space Flight Center in Greenbelt, Md., produced the film for its Science on a Sphere projection system -- a fully spherical video technology. The six-foot spheres are installed in more than 30 locations around the world. The space agency said Frozen uses satellite data to investigate all parts of...

2009-01-28 13:11:02

The Dead Sea lies in a basin structure situated below the sea level. This deep subsidence is a result of a tectonic concurrence between processes in the upper lithosphere that led to subsiding and a compensating upward flow of rocks in the deeper layers of the lithosphere. This is a result presented by A. Petrunin and A. Sobolev from the GFZ - German Research Centre for Geosciences in the current issue of "PHYSICS OF THE EARTH AND PLANETARY INTERIORS" (Vol. 171, S. 387 - 399). In a series of...

3ddc809a92669f6a313d17442f617b3b1
2009-01-22 14:14:03

Drifting of the large tectonic plates and the superimposed continents is not only powered by the heat-driven convection processes in the Earth's mantle, but rather retroacts on this internal driving processes. In doing so, the continents function as a thermal blanket, which leads to an accumulation of heat underneath, and which in turn can cause the break-up of the super-continents. These results of numerical modeling have been published by scientists from the GFZ German Research Centre for...

ee5a953468fdaf9fac80c6d2b54cc9651
2009-01-08 12:35:00

Two rare meteorites found in Antarctica two years ago are from a previously unknown, ancient asteroid with an outer layer or crust similar in composition to the crust of Earth's continents, reports a research team primarily composed of geochemists from the University of Maryland.Published in the January 8 issue of the journal Nature, this is the first ever finding of material from an asteroid with a crust like Earth's. The discovery also represents the oldest example of rock with this...

210b38b062d3154466d1964660889eb61
2008-12-16 09:30:25

Two giant plumes of hot rock deep within the earth are linked to the plate motions that shape the continents, researchers have found. The two superplumes, one beneath Hawaii and the other beneath Africa, have likely existed for at least 200 million years, explained Wendy Panero, assistant professor of earth sciences at Ohio State University. The giant plumes -- or "superpiles" as Panero calls them -- rise from the bottom of Earth's mantle, just above our planet's core. Each is larger than the...

2008-12-10 13:07:08

A U.S.-led international team of scientists says it has, for the first time, recorded a geological event that is considered key in shaping the Earth's crust. Led by Purdue University Professor Eric Calais, the researchers said they measured ground displacements as two African tectonic plates moved apart and molten rock pushed its way toward the surface during the first so-called dyking event ever recorded within the planet's continental crust. Calais said the event left a wall of magma 6...

eb166c5457a8af5d2504405d89344ef11
2008-11-27 09:44:55

Analysis of minerals in ancient magmas paints new picture of early Earth A new picture of the early Earth is emerging, including the surprising finding that plate tectonics may have started more than 4 billion years ago "” much earlier than scientists had believed, according to new research by UCLA geochemists reported Nov. 27 in the journal Nature. "We are proposing that there was plate-tectonic activity in the first 500 million years of Earth's history," said geochemistry professor...

01c2d2d9240642ecfc8665f2a2b365bc1
2008-10-17 09:20:00

A new technique using X-rays has enabled scientists to play 'detective' and solve the debate about the origins of a three billion year old rock fragment. In the study, published today in the journal Nature, a scientist describes the new technique and shows how it can be used to analyze tiny samples of molten rock called magma, yielding important clues about the Earth's early history. Working in conjunction with Australian and US scientists, an Imperial College London researcher analyzed a...

fca8e488602bee743bafc47c4c0e60b51
2008-09-28 10:25:00

A strip of bedrock located in the eastern area of Canada's Hudson Bay was discovered to have the oldest rocks on Earth, said scientists on Thursday. The rocks were formed about 4.28 billion years ago, shortly after the planet was created. It might even contain evidence of movement by ancient creatures. If these findings are indeed correct, this would definitely be the first proof of life on Earth. However, co-author of the article, Don Francis, warned that this had not been verified as of...


Latest Structure of the Earth Reference Libraries

Seismology
2014-01-12 00:00:00

Seismology is the scientific study of earthquakes and the spread of elastic waves through the Earth or through other planet-like bodies. The field includes studies of earthquake effects, such as tsunamis in addition to diverse seismic sources such as tectonic, volcanic, oceanic, atmospheric, and artificial processes. A related field that utilizes geology to infer information regarding past earthquakes is paleoseismology. A recording of earth motion as a function of time is a seismogram. A...

0_a4a5653b4a287158357a3d5b37b58d01
2014-01-12 00:00:00

Earth science (or geoscience) is the science of the planet Earth. Earth science can be broken down into four major disciplines, which are: geography, geology, geophysics, and geodesy. These disciplines use physics, chemistry, biology, chronology and mathematics to arrive to a greater understanding of the principal areas of the Earth system. Since Earth is the only known life-bearing planet, Earth science is solely dedicated to the geophysical makeup of our own planet. One discipline,...

6_914a7fcc557496313161b2da1b718dea2
2004-10-19 04:45:41

Meteorite -- A meteorite is a relatively small extraterrestrial material body that reaches the Earth's surface. While in space these bodies are called meteoroids. Upon entering the atmosphere air drag and friction will cause the body to heat up, emitting light, thus forming a meteor, fireball, or shooting star. Most meteors disintegrate in the air, making impact events (Earth impacts) on the surface of Earth uncommon. About 500 baseball sized rocks a year reach the surface. Large...

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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