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Geotimes
September 2003
Sara Pratt
Zircons reveal mantle evolution A team of Finnish geologists has discovered 3.1 billion-year-old zircons in the Jormua ophiolite of eastern Finland. Although not the oldest zircons on Earth, the Jormua zircons are the oldest yet found in mantle rocks. Their discovery has given scientists a brief glimpse into the history of early plate tectonics. mark for My Articles similar articles
Geotimes
November 2003
Naomi Lubick
Turkish tectonics Researchers recently published preliminary results of the first data collected with modern techniques documenting the tectonic and seismic regimes of eastern Turkey. Their work may overturn conceptions of the tectonic setting of the region. mark for My Articles similar articles
Chemistry World
May 28, 2014
Ian Randall
Earth's earliest continent formed like Iceland The Earth's first continents may have formed in a geological setting similar to modern-day Iceland, according to the geochemical analysis of a newly discovered rock unit from Canada. mark for My Articles similar articles
Geotimes
September 2007
Nicole Branan
Understanding the Crust Beneath Iran The most recent continent-continent collision on Earth began about 10 to 20 million years ago when the Arabian Plate slammed into Eurasia in what is modern-day Iran. An international team of researchers has brought to light an important piece of this ancient history. mark for My Articles similar articles
Geotimes
October 2004
California's Moho The southern Sierra Nevada mountain range in California has an anomalously thin crust and using seismic imaging, geologists have observed that something is missing. mark for My Articles similar articles
Geotimes
May 2007
Kathryn Hansen
Deep Earth May Hold an Ocean Earth's deep interior, more than 1,000 kilometers below the surface in the mantle, could prove to be a watery place. That's the conclusion researchers drew from an anomaly uncovered by the first global map of Earth's lower mantle, using a new type of seismic analysis. mark for My Articles similar articles
Geotimes
February 2005
Joshua Zaffos
Mid-Ocean Ridge Spread or Jam? Different spreading geologic ridges move at different rates, and new research may explain how changes in spreading rates affect heat distribution and crust development at the ridges, particularly the slow ones. mark for My Articles similar articles
Geotimes
July 2004
Jay Chapman
Squishy plates Using groundbreaking satellite techniques, new research suggests continental crust reacts to strain more like toothpaste than rigid blocks of rock. mark for My Articles similar articles
Chemistry World
July 22, 2011
David Bradley
Cracking diamonds reveals continental origins An analysis of the mineral inclusions in diamonds dredged up by eruptions from deep within the Earth has allowed scientists to get a handle on when the process of plate tectonics began. mark for My Articles similar articles
Geotimes
June 2005
Naomi Lubick
Double-Crossing the Core A team of scientists has taken the properties of a mineral from the Earth's lower mantle, together with seismic observations of the core-mantle boundary, to propose a new model that could elucidate the heat engine that drives Earth. mark for My Articles similar articles
Geotimes
July 2006
Carolyn Gramling
Afar From Close-up Powerful stresses in the crust lead to frequent earthquakes and volcanism in the Afar Depression of northeastern Ethiopia. Researchers now say that the source of this activity reveals a possible new connection in Earth's interior. mark for My Articles similar articles
Geotimes
November 2007
Carolyn Gramling
How Does Your Continent Grow? Data from ancient mantle rocks are helping to shore up the hypothesis that the continental crust was extracted in pulses, during periodic large melting events in the mantle. mark for My Articles similar articles
Geotimes
October 2006
Carolyn Gramling
Flexing Plates Produce Volcanoes There's a new kind of volcano in town, according to a new study. mark for My Articles similar articles
Geotimes
April 2007
Nicole Branan
Found: Tibet's Missing Anchor Through new seismic work, researchers may have found a clue to why the Tibetan Plateau is as high as it is. A chunk of upper mantle that's been "missing" for some 15 million years may have contributed to the region's uplift, they say. mark for My Articles similar articles
Geotimes
July 2004
Sara Pratt
Core Compositions Scientists are working to explain the differences in composition between Earth and Mars. mark for My Articles similar articles
Chemistry World
May 11, 2006
Jon Evans
Sea Water Assumes the Xenon Mantle Geochemists have uncovered evidence that sea water incorporates noble gases into the Earth's mantle, overturning current theories of how noble gases are transported beneath the crust. mark for My Articles similar articles
Geotimes
September 2006
Lisa Rossbacher
Big Lonesome Mountain What makes Gros Morne National Park so special is that its stories match the experience each visitor brings. The more geology you know, the more you will see and the richer the visit will be, but the geology meets all visitors at their own level. mark for My Articles similar articles
Geotimes
September 2006
Carolyn Gramling
Donald Forsyth: At Play in the Field Forsyth emphasizes that collaborating with students and other researchers is not only important to solving tough geological puzzles, but also is much of the fun. mark for My Articles similar articles
Geotimes
January 2007
Nicole Branan
Heat Flow Causes Magnetic Reversals Earth's magnetic field has done hundreds of somersaults over the last few billion years. A new study sheds some light on what causes the geomagnetic field to flip. mark for My Articles similar articles
Geotimes
June 2007
Hansen & Gramling
Are Volcanoes Picky Eaters? New measurements of the concentrations of elements within magma suggest a volcano's food may be a complex recipe -- and that what kind of magma a volcano prefers may affect its physical features, including the size to which it can grow, according to new research mark for My Articles similar articles
Chemistry World
December 4, 2013
James Urquhart
Diamonds' redox reaction origins revealed Subduction zones -- boundaries between tectonic plates where the Earth's crust sinks into the hot mantle -- could be breeding grounds for diamond formation, according to Russian researchers. mark for My Articles similar articles
Geotimes
July 2007
Carolyn Gramling
X-ray Eyes in the Sky Scientists are working on the next generation of low-orbiting satellites that they hope will see far past the Earth's surface and into its interior, to better understand the structure and composition of Earth's crust, mantle and core. mark for My Articles similar articles
Geotimes
September 2005
Sara Pratt
Sourcing Ultradeep Diamonds Mineral impurities in a diamond may decrease the gem's value for jewelers, but for geologists they can prove to be priceless: South African diamonds containing garnet have recently provided evidence that very deep diamonds can form from surface materials. mark for My Articles similar articles
National Defense
September 2010
Grace V. Jean
Scientists Say They Are Closer Than Ever to Predicting Earthquakes Researchers have discovered that there are warning signs that can be detected in the weeks and hours prior to temblors. mark for My Articles similar articles
Geotimes
November 2005
Sara Pratt
Super-Rotation for Earth's Core A new earthquake study supports the 1996 finding that Earth's inner core is spinning faster than the planet's mantle and crust -- at a rate detectable on human timescales, but about one-third of the rate first suggested. mark for My Articles similar articles
Scientific American
March 2005
Madhusree Mukerjee
The Scarred Earth Tsunami-spawning quake leaves geophysical changes. mark for My Articles similar articles
Geotimes
February 2004
Naomi Lubick
Pursuing plumes Geophysicists recently presented improved methods for imaging mantle plumes, providing the strongest evidence yet that some plumes extend all the way down to the coremantle boundary. mark for My Articles similar articles
Chemistry World
February 26, 2014
Emma Stoye
Yellowstone spews out ancient helium Researchers have found that huge amounts of helium are being released through steam plumes in the US's Yellowstone National Park, having been stored in the Earth's crust for billions of years. mark for My Articles similar articles
Geotimes
July 2006
Carolyn Gramling
Earth Soaks up Seawater Geologists have long thought that seawater does not travel very far through Earth's interior A new geochemical study, however, is challenging that notion, saying that traces of seawater exist deep inside the planet. mark for My Articles similar articles