15116 (10) Pyroxene Basalt
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Fact sheet
Description: 

15116 is a coarse-grained mare basalt which was collected as a small fragment in a rake sample. Pyroxene forms chemically-zoned, bladed crystals intergrown with laths of plagioclase feldspar. Many plagioclase crystals have hollow cores. Pyroxene and plagioclase compose nearly 90% of the rock. The sample contains no olivine and is silica-rich. Rotation 1 shows a few troilite laths and in rotation 2 two irregular crystals of cristobalite are present. Other accessories include ilmenite, metallic iron and troilite. 

The sample weighed 7.2 grams before analysis. It has not been dated.

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

The mounting resin of this thin section has deteriorated over time and now contains clusters of colourful dendrites around the thin section. The section is also slightly thick (>30 microns).

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Not known
Ma = Millions of years ago
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igneous
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