Latest Mantle Stories

Melting Mantle Linked To Great Oxygenation Event 2.5 Billion Years Ago
2012-05-25 04:38:16

Brett Smith for RedOrbit.com Oxygen-based life evolved on Earth because of geological events that occurred over 2.5 million years ago, according to Princeton University researchers who published a report this week in the online journal Nature. Based on geological evidence, scientists know that roughly 2.5 billion years ago, oxygen levels in the atmosphere exploded and eventually gave birth to our present atmosphere. This time period, dubbed the Great Oxygenation Event (GOE), appears to...

Scientists Study Deep Rocks Under Pacific Ocean
2012-03-23 07:12:56

Scientists interested in the construction of the rock layers immediately under the Earth´s crust, the lithosphere and asthenosphere, have new tools to help analyze these layers and further understand plate tectonics. The researchers have been using seismic waves to study the lithosphere-asthenosphere boundary, or LAB. This boundary is where the hot, convecting mantle asthenosphere and the overlying cold and rigid lithosphere meet. It has been found that seismic waves move faster...

2012-03-13 16:17:36

The ESA´s GOCE satellite has produced the first global high-resolution map of the boundary between the Earth´s mantle and its crust, according to an ESA press release. Understanding the mantle-or MoHo-could provide us with clues about the Earth´s interior. The Earth´s crust makes up only 1% total volume of our planet and is just the outermost shell. However, this 1% is very important to the overall makeup of the Earth. Geological resources such as oil and minerals...

Mapping The Moho With GOCE
2012-03-11 06:35:30

The first global high-resolution map of the boundary between Earth´s crust and mantle — the Moho — has been produced based on data from ESA´s GOCE gravity satellite. Understanding the Moho will offer new clues into the dynamics of Earth´s interior. Earth´s crust is the outermost solid shell of our planet. Even though it makes up less than 1% of the volume of the planet, the crust is exceptionally important not just because we live on it, but because is the...

2012-02-27 05:50:54

Seawater circulation pumps hydrogen and boron into the oceanic plates that make up the seafloor, and some of this seawater remains trapped as the plates descend into the mantle at areas called subduction zones. By analyzing samples of submarine volcanic glass near one of these areas, scientists found unexpected changes in isotopes of hydrogen and boron from the deep mantle. They expected to see the isotope "fingerprint" of seawater. But in volcanoes from the Manus Basin they also discovered...

Image 1 - Building Blocks Of Early Earth Survived Collision That Created Moon
2012-02-18 06:32:01

Unexpected new findings by a University of Maryland team of geochemists show that some portions of the Earth's mantle (the rocky layer between Earth's metallic core and crust) formed when the planet was much smaller than it is now, and that some of this early-formed mantle survived Earth's turbulent formation, including a collision with another planet-sized body that many scientists believe led to the creation of the Moon. "It is believed that Earth grew to its current size by collisions...

A New Kind Of Metal In The Deep Earth
2011-12-20 03:45:43

The crushing pressures and intense temperatures in Earth's deep interior squeeze atoms and electrons so closely together that they interact very differently. With depth materials change. New experiments and supercomputer computations discovered that iron oxide undergoes a new kind of transition under deep Earth conditions. Iron oxide, FeO, is a component of the second most abundant mineral at Earth's lower mantle, ferropericlase. The finding, published in an upcoming issue of Physical Review...

Researchers Complete Mollusk Evolutionary Tree
2011-10-27 04:47:06

Mollusks have been around for so long (at least 500 million years), are so prevalent on land and in water (from backyard gardens to the deep ocean), and are so valuable to people (clam chowder, oysters on the half shell) that one might assume scientists had learned everything about them. “Here´s this big, diverse group of animals, and we don´t know how they were related to each other,” said Casey Dunn, an evolutionary biologist at Brown University who specializes in...

Diamonds Show Carbon Cycle May Reach Earth's Lower Mantle
2011-09-16 10:41:51

  By studying the chemistry of an unorthodox set of Brazilian diamonds, a team of researchers have discovered startling new information about the carbon cycle and the theory of plate tectonics. Researchers from the University of Bristol, Universidade de Brasilia, and the Carnegie Institution for Science studied what are known as "superdeep" diamonds, some of which originated from depths of 435 miles (700km) or more before erupting to the surface as volcanic rocks. Most diamonds...

2011-05-20 12:25:00

The inner core of the Earth is simultaneously melting and freezing due to circulation of heat in the overlying rocky mantle, according to new research from the University of Leeds, UC San Diego and the Indian Institute of Technology.The findings, published tomorrow in Nature, could help us understand how the inner core formed and how the outer core acts as a 'geodynamo', which generates the planet's magnetic field."The origins of Earth's magnetic field remain a mystery to scientists," said...

Latest Mantle Reference Libraries

Kelp Scallop, Leptopecten latiauratus
2013-04-16 20:25:12

Leptopecten latiauratus, the common name being the kelp scallop, is a small saltwater clam, a bivalve mollusk belonging to the family Pectinidae. It resides in water up to 850 feet deep. Similar to other scallops, it has many small primitive eyes around the rim of its mantle and escapes its predators by jet propulsion. The shell can be anywhere between 3 to 5 centimeters in size. It is mostly circular with two flat auricles or ears that extend off of the hinge. It usually has ridges that...

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
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'