14042 (26) Regolith breccia
We would like to thank the following for the use of this sample:
Samples 14041–14046 are fragments from a fractured clod that broke apart when it was collected. 14042 is the most like an Apollo 14 soil with a relatively high percentage of recognisable agglutinate fragments and a high carbon content. is a very friable, medium grey regolith breccia with very few clasts. The matrix contains glass and has a seriate grain size distribution of mineral clasts. The matrix is porous (about 35%) containing glass filaments and many tiny grains. The sample contains many spherical glass globules and irregularly-shaped glass of variable colour and composition. The sample has been classified as a vitric matrix breccia.
The sample weighed 103.2 grams before analysis. It has not been dated.
Our thin section is slightly thick and in places displays plagioclase feldspar as pale yellow crystals (in XPL). Rotation 1 shows fragments of breccia in breccia and rotation 2 shows a region containing small fragments of plagioclase-rich anorthositic material.
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