14066 (33) Crystalline breccia
We would like to thank the following for the use of this sample:
14066 is moderately friable with 15 to 20 % of subangular dark clasts and a few light clasts in a fine-grained light matrix. The matrix has interlocking grains of 5-20 micron plagioclase and pyroxene with 5 micron ilmenite. The matrix makes up 60-70 percent of the rock. The sample has many fractures, some penetrating. In reflected light both troilite and metallic iron can be seen.
The sample weighed 509.8 grams before analysis and is 4.06±0.14 billion years old (Rb/Sr).
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:
- metallic iron