72736 (9) Micropoikilitic Impact Melt Breccia
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Fact sheet
Description: 

72736 was collected as a rake sample. It is an impact melt rock rather typical of others found at Apollo 17. It has a matrix with a micropoikilitic texture. The matrix makes up over 70% of this sample and includes numerous plagioclase feldspar and anorthosite clasts. Grains of pink spinel have reaction coronas (see rotation 2). Rotation 1 shows a partially maskelynised plagioclase feldspar clast.

The sample weighed 28.73 grams before analysis and has not been dated.

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

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Not known
Ma = Millions of years ago
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metamorphic
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