14063 (51) Light matrix breccia
We would like to thank the following for the use of this sample:
14063 is a friable breccia having about 40% of sub-angular to sub-rounded clasts in a very light-grey matrix. Dark clasts are subordinate to light clasts, and there is some glass. It is a polymict breccia composed of a mixture of lithic and mineral clasts in a fine-grained matrix with seriate grain size distribution. Plagioclase is the dominant mineral, with subordinate pyroxene, olivine, ilmenite, spinel and metallic iron grains.
The sample weighed 135.45 grams before analysis and is 3.81-3.94±0.02 billion years old (Ar/Ar).
Rotation 1 shows a fractured black glass breccia clast containing a pink spinel crystal, whereas rotation 2 shows a polymict black glass clast.
The mounting resin of this thin section has deteriorated over time and now contains clusters of feathery crystallites around the margins of the thin section.
Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/
Ma = Millions of years ago
Rock forming mineral: