chondrites

Recently spacecraft aimed directly at the asteroids, such as NASA's Galileo and probes, helped shed light on this mystery, suggesting that stony meteorites known as chondrites come from similarly rocky,

Yahoo! News: Top Stories 2010

Many researchers have assumed that before continental crust formed the mantle's chemistry was similar to that of meteorites called chondrites, but that the formation of continents altered its chemistry, causing it to become depleted in the elements, called incompatible elements, that are extracted with the magma when melting occurs in the mantle.

PhysOrg.com - latest science and technology news stories 2010

Many researchers have assumed that before continental crust formed the mantle's chemistry was similar to that of meteorites called chondrites, but that the formation of continents altered its chemistry, causing it to become depleted in the elements, called incompatible elements, that are extracted with the magma when melting occurs in the mantle.

PhysOrg.com - latest science and technology news stories 2010

Dr Schmidt's study shows that the abundance ratios of HSE in the Earth's crust are much higher than those found in stony meteorites, known as chondrites, which represent the pristine material from the early Solar System.

YubaNet.com 2008

To date, about 20 iron meteorites and about 20 stony meteorites, called chondrites, have been identified as projectiles of the 175 known impact craters on Earth.

YubaNet.com 2008

Using primitive meteorites called chondrites as their models, earth and planetary scientists at Washington University in St. Louis have performed outgassing calculations and shown that the early Earth’s atmosphere was a reducing one, chock full of methane, ammonia, hydrogen and water vapor.

New Trouble for Wells's "Icon of Anti-Evolution #1"... - The Panda's Thumb 2005

Abundant tiny particles of diamond dust exist in sediments dating to 12,900 years ago at six North American sites, adding strong evidence for Earth's impact with a rare swarm of carbon-and-water-rich comets or carbonaceous chondrites, reports a nine-member scientific team.

Monday! rintrahroars 2009

“Organic particles embedded in minerals in the Orgueil and Ivuna carbonaceous chondrites.”

First Contact Marc Kaufman 2011

“Organic particles embedded in minerals in the Orgueil and Ivuna carbonaceous chondrites.”

First Contact Marc Kaufman 2011

For example, the asteroid Apophis likely one of those LL chondrites contains enough materials to construct about 125 five-gigawatt solar power satellites at 25,000 tons of steel each, plus Kalpana One style habitats for 100,000 people.

Asteroid Capture into Earth Orbit Stephen D. Covey 2010