Meteorites

Essay specific features

 

Issue:

Science

 

Written by:

Sarah C

 

Date added:

May 26, 2013

 

Level:

University

 

Grade:

A

 

No of pages / words:

3 / 797

 

Was viewed:

5758 times

 

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Essay content:

Chondrites are balls of mafic minerals with small grain size indicative of rapid cooling. In most chondrites small spherules, called chondrules, can be found. Chondrites are typically about 4.6 billion years old and are thought to represent material from the asteroid belt. It is unknown how they formed...
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It is unknown how they formed. Carbonaceous chondrites, thought to be unaltered solar nebula material, constitute about five percent of meteorites and contain small amounts of organic materials, including amino acids. Also, presolar grains are identified in carbonaceous chondrites. About six percent of meteorites are iron meteorites with intergrowths of iron-nickel alloys, such as kamacite...
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