15651 (7) Pigeonite Basalt
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Fact sheet
Description: 

15651 is a medium-grained olivine-bearing mare basalt with microgabbroic texture. In places the texture has been somewhat cataclasized by shock. Plagioclase feldspar and pyroxene make up 90% of the sample with olivine only occurring as a minor constituent (3%). Pyroxene and olivine are weakly chemically zoned and similar to that of olivine-normative basalts. Opaque minerals occur in clumps. The thin section is slightly too thin (<30 microns) and tapered.

The sample weighed 1.6 grams before analysis and has not been dated.

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

In Place
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Timescale:
Not known
Ma = Millions of years ago
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Type: 
igneous
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