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Chondrule

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chondrule [′kän‚drül]
(geology)
A spherically shaped body consisting chiefly of pyroxene or olivine minerals embedded in the matrix of certain stony meteorites.
Chondrule 

a circular formation averaging 0.5–1.0 mm in diameter that is the primary structural element of meteorites—chondrites (see). Three principal types are distinguished on the basis of texture: exocentric fan, grated, and porphyritic. Chondrules are rapidly cooled drops of molten silicate matter.
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With their high precision measurements, they are able to date formation times for chondrules very precisely," he said.
Scientists find 'stopwatch for the solar system' by Asian News International
This meteorite contains both chondrules and metal flaking and is an L4 type chondrite with a terrestrial age of between 15,000 and 20,000 years old.
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But, calculations on the retention of sodium by the chondrules suggest they formed in dense swarms.
Asteroid-sized balls of magma may have formed Earth and its rocky ... by Asian News International
 
 
 
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