14318 (47) Ancient Regolith Breccia
We would like to thank the following for the use of this sample:
14318 is a vitric matrix breccia. Most notable is the abundance of chondrule-like clasts, some with basaltic texture. It is a complex clast-rich, matrix-poor breccia composed of lithic fragments, chondrules, glass spherules, glass and mineral fragments set in a fine-grained, partly glassy matrix. The lithic fragments, chondrules, glasses etc. are welded to the matrix and partly recrystallised, indicating formation at a relatively high temperature. 14318 differs from most regolith breccias by the high proportion of lithic clasts and significantly less abundance of brown matrix glass. It may have formed from an immature soil.
14318 weighed 600.2 grams before analysis. It has not been dated.
Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/
Ma = Millions of years ago
Rock forming mineral:
- metallic iron