Latest Inner core Stories

2010-09-02 11:24:30

Using a diamond-anvil cell to recreate the high pressures deep within the earth, researchers at the California Institute of Technology (Caltech) have found unusual properties in an iron-rich magnesium- and iron-oxide mineral that may explain the existence of several ultra-low velocity zones (ULVZs) at the core"“mantle boundary. A paper about their findings was published in a recent issue of Geophysical Research Letters (GRL). ULVZs"”which were first discovered in the early 1990s...

2009-12-23 06:49:54

"Terra firma." It's Latin for "solid Earth." Most of the time, at least from our perspective here on the ground, Earth seems to be just that: solid. Yet the Earth beneath our feet is actually in constant motion. It moves through time and space, of course, along with the other objects in the universe, but it moves internally as well. The powerful forces of wind, water and ice constantly erode its surface, redistributing Earth's mass in the process. Within Earth's solid crust, faulting...

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...

2008-03-10 16:30:00

Geologists at the University of Illinois have confirmed the discovery of Earth's inner, innermost core, and have created a three-dimensional model that describes the seismic anisotropy and texturing of iron crystals within the inner core. "For many years, we have been like blind men touching different parts of an elephant," said U. of I. geologist Xiaodong Song. "Now, for the fist time, we have a sense of the entire elephant, and see what the inner core of Earth really looks like." Using both...

2005-08-25 16:51:37

WASHINGTON -- The giant iron ball at the center of the Earth appears to be spinning a bit faster than the rest of the planet. The solid core that measures about 1,500 miles in diameter is spinning about one-quarter to one-half degree faster, per year, than the rest of the world, scientists from Columbia University's Lamont-Doherty Earth Observatory and the University of Illinois at Urbana-Champaign report in Friday's issue of the journal Science. The spin of the Earth's core is an important...

2005-06-01 15:11:04

TEMPE, Ariz. - Deep within Earth, researchers are finding hints of exotic materials and behaviors unrivaled anywhere else on the planet. Now a team of researchers is making connections between the dynamic activities deep inside Earth and geologic features at its surface. The researchers, which include two seismologists from Arizona State University, have detected a relatively small and isolated patch of exotic material, called an ultra low velocity zone (ULVZ), that may in fact be a "root"...

Word of the Day
  • A Roman unit of weight, 1⁄1728 of a pound.
  • A weight of four grains used in weighing gold and precious stones; a carat.
  • In anatomy, a formation suggesting a husk or pod.
  • The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
  • A coin of base silver of the Gothic and Lombard kings of Italy.
'Siliqua' comes from a Latin word meaning 'a pod.'