Search results for hydrosphere

Earth Sciences Oct 11, 2009

Banded rocks reveal early Earth conditions, changes

(PhysOrg.com) -- The strikingly banded rocks scattered across the upper Midwest and elsewhere throughout the world are actually ambassadors from the past, offering clues to the environment of the early Earth more than 2 billion ...

Earth Sciences Jul 01, 2019

Why is the Earth's F/Cl ratio not chondritic?

Primitive chondrites, un-molten stony meteorites, are believed to be the building blocks of the Earth. Because terrestrial planets have experienced chemical differentiation in the core, mantle, and hydrosphere, the elemental ...

Earth Sciences Apr 01, 2008

Continents loss to oceans boosts staying power

New research in the Proceedings of the National Academy of Science finds that the geological staying power of continents comes partly from their losing battle with the Earth's oceans over magnesium. Continents lose more than ...

Earth Sciences Jan 23, 2019

Planetary collision that formed the moon made life possible on Earth

Most of Earth's essential elements for life—including most of the carbon and nitrogen in you—probably came from another planet.

Space Exploration Feb 06, 2018

New study sheds light on Moon's slow retreat from frozen Earth

A study led by University of Colorado Boulder researchers provides new insight into the Moon's excessive equatorial bulge, a feature that solidified in place over four billion years ago as the Moon gradually distanced itself ...

Earth Sciences Nov 02, 2017

Minerals in volcanic rock offer new insights into the first 1.5 billion years of Earth's evolution

The first 1.5 billion years of Earth's evolution is subject to considerable uncertainty due to the lack of any significant rock record prior to four billion years ago and a very limited record until about three billion years ...

Earth Sciences Jul 26, 2017

Conductivity key to mapping water inside Earth

Hydrogen at elevated temperature creates high electrical conductivity in the Earth's mantle.

Space Exploration Aug 27, 2014

Scientist uncovers red planet's climate history in unique meteorite

Was Mars—now a cold, dry place—once a warm, wet planet that sustained life? And if so, how long has it been cold and dry?

Earth Sciences Feb 23, 2014

Oldest bit of crust firms up idea of a cool early Earth

With the help of a tiny fragment of zircon extracted from a remote rock outcrop in Australia, the picture of how our planet became habitable to life about 4.4 billion years ago is coming into sharper focus.

Earth Sciences Jun 13, 2010

New study indicates an ancient ocean may have covered one-third of Mars

A vast ocean likely covered one-third of the surface of Mars some 3.5 billion years ago, according to a new study conducted by University of Colorado at Boulder scientists.

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