Historical Meteorites


Allende, Carbonaceous Chondrite (CV3)
Fell February 12, 1969,
Allende, Mexico
 


A 47 gram partslice of Allende.  A large
CAI can be seen to the right of center.

Allende is a rare type of meteorite called carbonaceous chondrite, so called because it is rich in carbon. It was the first material to be analyzed by the then new Lunar Receiving Laboratory (LRL) 1969 in preparation for the moon rocks brought back by the Apollo astronauts. Allende contains white, irregular shaped intersteller grains, called calcium-aluminum inclusions (CAIs), that are thought to be the remains of an exploded star that pre-dates the solar system.  In addition, Allende has many well defined chondrules of varying sizes and numerous inclusions that are still being identified. Allende is one of the most studied of meteorites and forms the cornerstone of a meteorite collection.  

Return to the Main Page