14313 (42) Regolith Breccia
We would like to thank the following for the use of this sample:
14313 is a fine-grained regolith breccia with seriate grain size distribution. It has few large clasts and is mostly matrix. 14313 is a coherent polymict breccia that has had a complex history of “comminution and re-agglomeration”. The matrix is composed primarily of fine particles of brown glass. Clasts include (1) noritic rock fragments, (2) monomineralic fragments, (3) microbreccia clasts, (4) glassy fragments including chondrules and rare mare basalt clasts. There is evidence of breccia-in-breccia relations indicating multiple generations of breccia formation.
14313 weighed 144 grams before analysis. It has not been dated precisely, but is thought to be 3.7 billion years old.
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