72558 (5) Micropoikilitic Impact Melt Breccia
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Fact sheet
Description: 

72558 is a clast-bearing impact melt breccia with high trace element content. It has a crystalline matrix with microgranular-micropoikilitic texture. Mineral and lithic clasts occur in equal abundances. Pink spinel is noted in this sample but does not appear to be present in our thin section. Rotation 1 shows mineral and lithic clasts and rotation 2 shows clasts of olivine, pyroxene and plagioclase feldspar.

The sample weighed 5.71 grams before analysis. A dating attempt was unsuccessful.

Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/

In Place
In Time
Accuracy:
Timescale:
Not known
Ma = Millions of years ago
In Focus
Collection:
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Type:
Type: 
metamorphic
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