Tag: Department of Earth and Environmental Sciences
To probe the origin of Earth’s magnetism, a team led by John Tarduno retrieved rock samples from the Jack Hills in Western Australia – home to some of the oldest rocks on the planet.
The Earth’s magnetic field, which shields the atmosphere from harmful radiation, is at least four billion years old, according to scientists.
Since 2010, the best estimate of the age of Earth’s magnetic field has been 3.45 billion years. But now the Rochester researcher responsible for that finding has new data showing the magnetic field is far older.
Combined with the current weakening of Earth’s magnetic field, the data suggest that the region of Earth’s core beneath southern Africa may play a special role in reversals of the planet’s magnetic poles.
Patches of ground where huts were burned down in southern Africa contain a key mineral that recorded the magnetic field at the time of each ritual burning.
A new study demonstrates for the first time how elemental carbon became an important construction material of some forms of ocean life after one of the greatest mass extinctions in the history of Earth more than 252 million years ago.
Rochester researchers now know what causes the bend in the otherwise straight line of the Appalachian Mountains, and this new understanding of the region’s underlying structures could inform debates over the practice of hyrdrofracking.
Home to some of the most active volcanoes in the world, researchers now have a better picture of the subterranean plumbing system that feeds the Galápagos volcanoes.