Latest Primitive mantle Stories
One of the more popular theories surrounding the formation of the planets involves the countless collisions of smaller objects in orbit around the sun 4.5 billion years ago. However, proponents of that theory are missing one thing: the Earth's chemical composition is distinctly different from the meteors that are currently striking the planet.
New research from Matthew Jackson and Richard Carlson proposes that the remnants of six of the largest volcanic events of the past 250 million years contain traces of the ancient Earth's primitive mantleâ€”which existed before the largely differentiated mantle of todayâ€”offering clues to the geochemical history of the planet.
Researchers discover evidence for the oldest Earth mantle reservoir on Baffin Island.
Working with colleagues from NASA, a Florida State University researcher has published a paper that calls into question three decades of conventional wisdom regarding some of the physical processes that helped shape the Earth as we know it today.
- A gift; a largess; a gratuity; a present; a dole.